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product structure silicon monolithic integrated circuit it is not the radiation-pr oof design for this product. 1/23 tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 14 ? 001 36vhigh-performance, high-reliability withstand voltage stepping motor driver BD63720AEFV general description BD63720AEFV is a bipolar low-consumption driver that driven by pwm current. rated power supply voltage of the device is 36 v, and rated output current is 2.0 a. clk-in driving mode is adopted for input interface, and excitation mode is corresponding to full step mode, half step mode (2 types) and quarter step mode via a built-in dac. in terms of current decay, the fast decay/slow decay ratio may be set without any limitation, and all available modes may be controlled in the most appropriate way. in addition, the power supply may be driven by one single system, which simplifies the design. features rated output current dc 2.0a low on resistance dmos output clk-in drive mode pwm constant current (o ther oscillation) built-in spike noise cancel function (external noise filter is unnecessary) full-, half (two kinds)-, quarter-step functionality freely timing excitation mode switch current decay mode switch linearly variable fast/slow decay ratio normal rotation & reve rse rotation switching function power save function built-in logic input pull-down resistor power-on reset function thermal shutdown circuit (tsd) over-current protection circuit ocp under voltage lock out circuit (uvlo) over voltage lock out circuit (ovlo) ghost supply prevention (protects against malfunction when power supply is disconnected) adjacent pins short protection microminiature, ultra-thin and high heat-radiation (exposed metal type) package application ppc, multi-function printer, laser beam printer, and ink-jet printer monitoring camera and web camera sewing machine photo printer, fax, scanner and mini printer toy and robot major characteristics range of power supply voltage rated output current (continuous) rated output current (peak value) range of operating temperature output on resistance (total of upper and lower resistors) 19 28 [v] 2.0 [a] 2.5 [a] -25 +85 [ ] 0.65 [ ] (typ.) package w(typ.) x d(typ.)x h(max.) htssop-b28 9.70 mm x 6.40mm x 1.00mm basic application circuit figure.1 BD63720AEFV application circuit diagram 10 c r 12 mth 17 test 7 vcc1 2 out1b 5 out1a 3 rnf1 22 vcc2 24 out2a 1 gnd 27 out2b 26 rnf2 rnf1s 4 rnf2s 25 15 cl k 18 mode0 19 mode1 16 cw_ccw 20 enable vref 13 9 gnd 14 ps downloaded from: http:///
2/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 out2b rnf1s out1a vcc1 nc mth vref ps nc rnf2s gnd out1b rnf1 rnf2 out2a nc vcc2 mode1 mode0 test clk cw_ccw enable nc gnd cr nc nc terminals configuration diagram [top view] block diagram descriptions on terminals pin no. pin name function pin no. pin name function 1 gnd ground terminal 15 clk clock input terminal for advancing the electrical angle. 2 out1b h bridge output terminal 16 cw_cc w motor rotating direction setting terminal 3 rnf1 connection terminal of resistor for output current detection 17 test terminal for testing (used by connecting with gnd) 4 rnf1s input terminal of current limit comparator 18 mode0 motor excitation mode setting terminal 5 out1a h bridge output terminal 19 mode1 motor excitation mode setting terminal 6 nc non connection 20 enable output enable terminal 7 vcc1 power supply terminal 21 nc non connection 8 nc non connection 22 vcc2 power supply terminal 9 gnd ground terminal 23 nc non connection 10 cr connection terminal of cr for setting chopping frequency 24 out2a h bridge output terminal 11 nc non connection 25 rnf2s input terminal of current limit comparator 12 mth current decay mode setting terminal 26 rnf2 connection terminal of resistor for output current detection 13 vref output current value setting terminal 27 out2b h bridge output terminal 14 ps power save terminal 28 nc non connection 7 8 6 5 3 4 2 1 figure.2 terminals configuration diagram 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 mode0 mode1 enable predriver 7 vcc1 blank time pwm control translator 2bit dac tsd uvlo regulator reset 9 gnd 10 c r 12 mth 14 ps 15 cl k 18 19 16 20 vref 13 2 out1b 5 out1a 3 rnf1 22 vcc2 24 out2a 1 gnd 27 out2b 26 rnf2 17 test control logic mix decay control ocp osc rnf1s 4 rnf2s 25 ovlo rnf1srnf2s figure.3 BD63720AEFV block diagram cw_ccw downloaded from: http:///
3/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 absolute maximum rated values (ta=25 ) item symbol rated value unit supply voltage v cc1,2 -0.2 +36.0 v power dissipation pd 1.45 1 w 4.70 2 w input voltage for control pin v in -0.2 +5.5 v rnf maximum voltage v rnf 0.7 v maximum output current (dc) i out 2.0 3 a/phase maximum output current (peak) 4 i outpeak 2.5 3 a/phase operating temperature range t opr -25 +85 storage temperature range t stg -55 +150 1 70mm 70mm 1.6mm glass epoxy board. derating in done at 11.6mw/ for operating above ta=25 . 2 4-layer recommended board. derating in done at 37.6mw/ for operating above ta=25 . 3 do not, however exceed pd, aso and tjmax=150 . 4 pulse width tw Q 1ms, duty 20%. caution: operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. therefore, it is import ant to consider circuit protection measures, such as adding a f use, in case the ic is operated over the absolute maximum ratings. recommended operating range (ta= -25 +85 ) item symbol rated value unit supply voltage v cc1,2 19 28 v maximum output current (dc) i out 1.7 5 a/ phase *5 not exceeding pd aso or tj=150 downloaded from: http:///
4/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 electrical characteristics (unl ess otherwise specified ta=25 , v cc1,2 =24v) item symbol specification unit condition minimum standard maximum [whole] circuit current at standby i ccst - 0.8 2.0 ma ps=l circuit current i cc - 2.0 5.0 ma ps=h, vref=3v [control input] (clk) h-level input voltage v in1h 2.8 - - v l-level input voltage v in1l - - 0.6 v input hysteresis voltage v in1hys - 0.85 - v h-level input current i in1h 35 50 100 a v in1 =5v l-level input current i in1l -10 0 - a v in1 =0v [control input] h-level input voltage v in2h 2.0 - - v l-level input voltage v in2l - - 0.8 v h-level input current i in2h 35 50 100 a v in2 =5v l-level input current i in2l -10 0 - a v in2 =0v [output (out1a, out1b, out2a, out2b)] output on resistance r on - 0.65 0.85 i out = 1.0a (total of upper and lower resistors) output leak current i leak - - 10 a [current control] rnfxs input current i rnfs -2.0 -0.1 - a rnfxs=0v rnfx input current i rnf -80 -40 - a rnfx=0v vref input current i vref -2.0 -0.1 - a vref=0v vref input voltage range v vref 0 - 3.0 v mth input current i mth -2.0 -0.1 - a mth=0v mth input voltage range v mth 0 - 3.5 v minimum on time (blank time) t onmin 0.3 0.7 1.5 s c=1000pf, r=39k comparator threshold v cth 0.57 0.60 0.63 v vref=3v downloaded from: http:///
5/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 function explanation clk clock input terminal for advancing the electrical angle clk is reflected at rising edge. the electrical angle advances by one for each clk input. motors misstep will occur if noise is picked up at the clk terminal, so please design the pattern in such a way that there is no noise plunging mode0,mode1 motor excitation mode setting terminal set the motor excitation mode please refer to the p.12, 13 for the timing chart & motor torque vector of various excitation modes. unrelated to clk, change in setting is forcibly reflected (refer to p.15). cw_ccw terminal motor rotating direction setting set the motors rotating direction. change in setting is reflec ted at the clk rising edge immediately after the change in setting (refer to p.14) cw_ccw rotating direction l clockwise (ch2s current is outputted with a phase lag of 90 in regard to ch1s current) h counter clockwise(ch2s current is outputted with a phase lead of 90 in regard to ch1s current) enable terminal output enable terminal turn off forcibly all the output transistors (motor output is open). when enable=l, input to clk is blocked, and phase advance o peration of internal transl ator circuit is stopped. however, during excitation modes (mode0,mode1) switch within the interval of enable=l, as enable=l h is reset, the new mode upon switch will be applied for excitation (see p.15). enable motor output l open (electrical angle maintained) h active ps power save terminal ps can make circuit standby state and make motor output open. in standby state, translator circuit is reset (initialized) and electrical angle is initialized. please be careful because there is a delay of 40 s(max.) before it is returned from standby state to normal state and the motor output becomes ac tive (refer to p.11). ps status l standby state(reset) h active the electrical angle (initial electrical angle) of each excitation mode immediately after reset is as follows (refer to p.12, 13). excitation mode initial electrical angle full step 45 halfstep a 45 halfstep b 45 quarter step 45 mode0 mode1 excitation mode l l full step h l half step a l h half step b h h quarter step downloaded from: http:///
6/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 vcc1,vcc2 power supply terminal motors drive current is flowing in it, so please wire in such a way that the wire is thick & short and has low impedance. voltage vcc may have great fluctuation, so please arrange the bypass capacitor of about 100 ? 470 f as close to the terminal as possible and adjust in such a way that the volt age vcc is stable. please increase the capacity if needed especially when a large current is used or those motors that have great back electromotive force are used. in addition, for the purpose of reducing of power supplys impedance in wide frequency bandwidth, parallel connection of multi-layered ceramic capacitor of 0.01 ? 0.1 f etc is recommended. extreme care must be used to make sure that the voltage vcc does not exceed the rating even for a moment. vcc1 & vcc2 are shorted inside ic, so please be sure to short externally vcc1 & vcc2 when using. if used without shorting, malfuncti on or destruction may occur because of concentration of current routes etc., so please make sure t hat they are shorted when in use. still more , in the power supply terminal, there is built-in clamp component for preventing of electrostatic destruction. if steep pulse or voltage of surge more that maximum absolute rating is applied, this clamp comp onent operates, as a result there is t he danger of destruction, so please be sure that the maximum absolute rating must not be exceeded. it is effective to m ount a zener diode of about the maximum absolute rating. moreover, the diode for preventing of electrostatic destruction is inserted between vcc terminal and gnd terminal, as a result there is the danger of ic destruction if reverse voltage is applied between vcc terminal and gnd terminal, so plea se be careful. gnd ground terminal in order to reduce the noise caused by switching current and to stabilize the internal reference voltage of ic, please wire in such a way that the wiring impedance from this terminal is made as low as possible to achieve the lowest electrical potential no matter what operating state it may be. out1a,out1b,out2a,out2b h bridge output terminal motors drive current is flowing in it, so please wire in such a way that the wire is thick & short and has low impedance. it i s also effective to add a schottky diode if output has positive or negative great fluctuation when la rge current is used etc, for example, if counter electromotive voltage etc. is great. moreover, in the output te rminal, there is built-in clamp component for preventing of electrostatic destruction. if steep pulse or vo ltage of surge more than maximum absolute rating is applied, this clamp component operates, as a result there is the danger of even destructi on, so please be sure that the maximum absolute rating must not be exceeded. rnf1,rnf2 connection terminal of resistor for detecting of output current please connect the resistor of 0.1 ? 0.3 for current detection between this termina l and gnd. in view of the power consumption of the current-detecting resistor, please determine the resi stor in such a way that w=i out2 ? r[w] does not exceed the power dissipation of the resistor. in addition, plea se wire in such a way that it has a low impedance and does not have a impedance in common with other gnd patterns becau se motors drive current flows in the pattern through rnf terminal current-detecting resistor gnd. please do not exceed the rating becaus e there is the possibility of circuits malfunction etc. if rnf voltage has exceeded the maximum ra ting (0.7v). moreover, please be careful because if rnf terminal is shorted to gnd, large current flows without normal pwm constant current control, then there is the danger that ocp or tsd will operate. if rnf terminal is open, then there is the possibility of su ch malfunction as output current does not flow either, so please do not let it open. rnf1s,rnf2s input terminal of current limit comparator in this series, rnfs terminal, which is the input terminal of cu rrent limit comparator, is inde pendently arranged in order to decrease the lowering of current-detecti ng accuracy caused by the wire impedance inside the ic of rnf terminal. therefore, please be sure to connect rnf terminal and rnfs te rminal together when using in the case of pwm constant current control. in addition, because the wires from rnfs termi nal is connected near the current-detecting resistor in the case of interconnection, the lowering of current-detecting accuracy, which is c aused by the impedance of board pattern between rnf terminal and the current-detecting resistor, can be decreased. moreover, please design the pattern in such a way that there is no noise plunging. in addition, please be ca reful because if terminals of rnf1s & rnf2s are shorted to gnd, large current flows without normal pw m constant current control and, then there is the danger that ocp or tsd will operate. vref output current value setting terminal this is the terminal to set the output current value. the output current value can be set by vref voltage and current-detecting resistor (rnf resistor). output current i out [a] = {vref [v] / 5(division ratio inside ic)} / rnf [ ? ] please avoid using it with vref terminal open because if vr ef terminal is open, the input is unsettled, and the vref voltage increases, and then there is the possibility of such malfunctions as the se tting current increases and a large current flows etc. please keep to the input volta ge range because if the voltage of over 3v is applied on vref terminal, then there is also the danger that a large current flows in the output and so ocp or tsd will operate. besides, please take into consideration the outflow current (max.2 a) if inputted by resistance division w hen selecting the resistance value. the minimum current, which can be controlled by vref voltage, is determined by motor coils l & r values and minimum on time because there is a minimum on time in pwm drive. downloaded from: http:///
7/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 cr connection terminal of cr for setting chopping frequency this is the terminal to set the chopping freq uency of output. please connect the external c(470p 1500pf) and r(10k 200k ) between this terminal and gnd. please refer to p9. please interconnect from external components to gnd in such a way that the interconnect ion does not have impedance in common with other gnd patterns. in addition, please carry out t he pattern design in such ways as keeps such steep pulses as square wave etc. away and that there is no noise plungi ng. please mount the two compon ents of c and r if being used by pwm constant current control because normal pwm constant current control bec omes impossible if cr terminal is open or it is biased externally. mth current decay mode-setting terminal this is the terminal to set the current decay mode. current decay mode can be optionally set according to input voltage. mth terminal input voltage[v] current decay mode 0~0.3 slow decay 0.4~1.0 mix decay 1.5~3.5 fast decay please connect to gnd if using at slow decay mode. please avoid using with mth terminal open because if mth terminal is open, the input is uns ettled, and then there is the danger that pwm operation becomes unsta ble. besides, please take into consideration the outflow current (max.2 a) if inputted by resistance division when selecting the resistance value. test terminal terminal for inspection this terminal is used for delivery inspection on ic, and shall be grounded before use. in addition, malfunctions may be caused by application without grounding. nc terminal this terminal is unconnected electrically with ic internal circuit. downloaded from: http:///
8/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 thermal shutdown (tsd) this ic has a built-in thermal shutdown circuit for ther mal protection. when the ics chip temperature rises above 175 (typ.), the motor output becomes open. also, when the temperature returns to under 150 (typ.), it automatically returns to normal operatio n. however, even when tsd is in operati on, if heat is continued to be added externally, heat overdrive can lead to destruction. over current protection (ocp) this ic has a built in over current protection circuit as a provision against destruction when the motor outputs are shorted each other or vcc-motor output or motor output-gnd is shorted. this ci rcuit latches the motor output to open condition when the regulated threshold current flows for 4 s (typ.). it returns with power reactivation or a reset of the ps terminal. the over current protection circuits only aim is to prevent the destruction of the ic from irregular situations such as motor output shorts, and is not meant to be used as protection or security for the set. therefore, sets should not be designed to take into account this circuits function s. after ocp operating, if irre gular situations continues and the return by power reactivation or a reset of the ps te rminal is carried out repeatedly, then ocp operates repeatedly and the ic may generate heat or otherwise deteriorate. when t he l value of the wiring is great due to the wiring being long, after the over current has flowed and the output terminal voltage jumps up and the absolute maximum values may be exceeded and as a result, there is a possibility of destruction. also, when curren t which is over the output current rating and under the ocp detection current flows, the ic can heat up to over tjmax=150 and can deteriorate, so current which exceeds the output rating should not be applied. under voltage lock out (uvlo) this ic has a built-in under voltage lock out function to pr event false operation such as ic output during power supply under voltage. when the applied voltage to the vcc terminal goes under 15v (typ.), the motor output is set to open. this switching voltage has a 1v (typ.) hysteresis to prev ent false operation by noise etc. please be aware that this circuit does not operate during power save mode. also, the electrical angle is reset when the uvlo circuit operates during clk-in drive mode. over voltage lock out (ovlo) this ic has a built-in over voltage lock out function to pr otect the ic output and the mo tor during power supply over voltage. when the applied voltage to the vcc terminal goes ov er 32v (typ.), the motor output is set to open. this switching voltage has a 1v (typ.) hysteresis and a 4 s (typ.) mask time to prevent false operation by noise etc. although this over voltage locked out ci rcuit is built-in, there is a possibilit y of destruction if the absolute maximum value for power supply voltage is excee ded, therefore the absolute maximum valu e should not be exceeded. please be aware that this circuit does not operate during power save mode. ghost supply prevention (protects against malf unction when power supply is disconnected) if a signal (logic input, mth, vref) is input when there is no power supplied to this ic, there is a function which prevents the false operation by volta ge supplied via the electrostatic destruct ion prevention diode from these input terminals to the vcc to this ic or to another ics power s upply. therefore, ther e is no malfunction of the circuit even when voltage is supplied to these input terminals while there is no power supply. downloaded from: http:///
9/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 pwm constant current control 1) current control operation when the output transistor is turned on, t he output current increases, raising the vo ltage over the current sense resistor. when the voltage on the rnf pin reaches the voltage value set by the internal 2-bit dac and the vref input voltage, the current limit comparator engages and enters current decay mode. the output is then held off for a period of time determined by the rc time constant conn ected to the cr pin. the process repeats itself constantly for pwm operation. 2) noise-masking function in order to avoid misdetection of output current due to rnf spikes that may occur when the output turns on, the ic employs an automatic current detection-masking period (t onmin ), during which current detecti on is disabled immediately after the output transistor is turned on. this allows for constant-current drive without the n eed for an external filter. this noise-masking period defines the minimum on-time for the motor output transistor. 3) cr timer the cr filter connected to the cr pin is repeatedly c harged and discharged between the vcrh and vcrl levels. the output of the internal comparator is masked while charging fr om vcrl to vcrh in order to cancel noise. (as mentioned above, this period defines the minimum on -time of the motor output transistor.) the cr terminal begins discharging once the voltage reaches vcrh. when the output current reaches t he current limit during this period (i.e. rnf voltage reaches the decay trigger voltage), then the ic ent ers decay mode. the cr continues to discharge during this period until it reaches vcrl, at which point the ic output is switched back on. the current output and cr pin begin charging simultaneously. the cr charge time (t onmin ) and discharge time (t discharge ) are set by external component s, according to the following formulas. the total of t onmin and t discharge yield the chopping period, t chop . t onmin [s] P c ? r' ? r / (r'+r) ? ln[(vcr-0.4)/(vcr-1.0)] vcr=v ? r/(r'+r) v: internal regulator voltage 5v(typ.) r': cr terminal internal impedance 5k (typ.) t discharge [s] P c ? r ? ln[(1+ )/0.4] :see the right graph. t chop [s] P t onmin + t discharge figure 4 timing chart of cr voltag e, rnf voltage and output current attach a resistor of at least 10 k ? to the cr terminal (10 k ? ~200 k ? recommended) as lower values may keep the rc from reaching the vcrh voltage level. a capacit or in the range of 470 pf C 1500 pf is also recommended. as the capacitance value is increased, however, the noise-masking period (t onmin ) also increases, and there is a risk that the output current may exceed the current limit threshold due to the internal l and r components of the output motor coil. also, ensure that the chopping period (t chop ) is not set longer than necessary, as doing so wi ll increase the output ripp le, thereby decreasing the average output current and yielding lower out put rotation efficiency. the optimal value should reduce the motor drive noise while keeping distortion of the output current waveform to a minimum. cr voltage rnf voltage output current spike noise current limit value gnd minimum on time t onmin vcrh(1.0v typ.) vcrl(0.4v typ.) gnd 0ma current limit value chopping period t chop discharge time t discharge . . 5 . . 5 . . 5 . 5 5 [ p f ] [ v ] downloaded from: http:///
10/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 current decay mode the ic allows for a mixed decay mode in which the ratio of fast and slow decay can be optionally set. the following diagrams show the operating state of each transi stor and the regenerative current path during attenuation for each decay mode: figure 5 route of regenerated current during current decay the merits of each decay mode are as follows: slow decay during current attenuation, the voltage between motor coils is small and the regeneration current decreases slowly, decreasing the output current ripple. this is favorable for ke eping motor torque high. howeve r, due to fall-off of current control characteristics in the low-curre nt region, or due to reverse emf of the output motors exhibited when using high-pulse-rate half-step or quarter-step modes, the output current increases, di storting the output current waveform and increasing motor vibration. thus, this decay mode is most suited to full-step modes, or low-pulse-rate half-step or quarter-step modes. fast decay fast decay decreases the regeneration current much more quickly than slow decay, greatly reducing distortion of the output current waveform. however, fast decay yields a much larger output current ripple, which decreases the overall average current running through the motor. this causes two problems: first, the motor to rque decreases (increasing the current limit value can help eliminate th is problem, but the rated output current must be taken into consideration); and second, the power loss within the motor increases and thereby radiates more heat. if neither of these problems is of concern, then fast decay can be used for hi gh-pulse rate half- or quarter-step drive. additionally, this ic allows for a mixed decay mode that can help improve upon problems that ar ise from using fast or slow decay alone. in this mode, the ic switches automatically between slow and fast decay, improving the current control characteristics without increasing the output current ripple. the ratio of fast to slow decay is set externally via the voltage input to the mth pin; therefor e, the optimal mix of slow and fast decay ca n be achieved for each application. mixed decay mode operates by splitting the decay period into two sections, the first x%(t1-t2) of which operates the ic in slow decay mode, and the remainder(t2-t3) of which op erates in fast decay mode. however, if the output current (i.e., the voltage on the rnf pin) does not reach the set curr ent limit during the first x% (t1-t2) decay period, the ic operates in fast decay mode only. mth voltage [v] current decay mode 0~0.3 slow decay 0.4~1.0 mix decay 1.5~3.5 fast decay figure 6 relation between cr terminal voltage, mt h voltage, and output curr ent during mixed decay on off off on m on off off fast decay slow decay on off off on m on on off off output on time current decay time cr voltage current limit value output current 0a gnd 1.0v 0.4v slow decay fast decay chopping period t chop mth voltage t1 t2 t3 downloaded from: http:///
11/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 translator circuit this series builds in translator circuit and can drive stepping motor in clk-in mode. the operation of the translator circuit in clk-in drive mode is described as below. reset operation the translator circuit is initialized by power on reset function and ps terminal. ? initializing operation when power supply is turned on if power supply is turned on at ps=l (please use this sequence as a general rule) when power supply is turned on, the power on reset function oper ates in ic and initialized, but as long as it is ps=l, the motor output is the open state. after power supp ly is turned on, because of the changing of ps=l ? h, the motor output becomes the active state, and the excitation is start ed at the initial electrical angle. but at the time of ps=l ? h, it returns from the st andby state to the normal state and there is a delay of 40 s(max.) until the motor output has become the active state. if power supply is turned on at ps=h when power supply is turned on, the power on function in ic operates, and initialized before the motor output becomes the active state, and the excitation is started at the init ial electrical angle. ? initializing operation during motor operating please input the reset signal to ps terminal when the translator circuit is initialized during motor operating. (refer to p.14) but at the time of ps=l ? h, it returns from the standby state to t he normal state and there is a delay of 40 s (max.) until the motor output has become th e active state, so please be careful. control input timing please input as shown below because the translator circuit operates at the rising edge of clk signal. if you disobey this timing and input, then there is the possibili ty that the translator circuit does not operate as expected. in addition, at the t ime of ps=l ? h, it returns from the st andby state to the normal state and there is a delay of 40 s (max.) until the motor output has become the active state, so within this delay interval there is no phase advance operati on even if clk is inputted. a:ps minimum input pulse width ?????? 20 s b:ps rising edge clk rising edge input possible maximum delay time ?????? 40 s c:clk minimum period ?????? 4 s d:clk minimum input h pulse width ?????? 2 s e:clk minimum input l pulse width ?????? 2 s f:mode0,mode1,cw_ccw set-up time ?????? 1 s g:mode0,mode1,cw_ccw hold time ?????? 1 s reset is released active motor output open motor output on delay ps clk out1a out1b ps clk mode0 fg fg mode1 cw _ ccw a de bc downloaded from: http:///
12/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 ? full step (mode0=l, mode1=l, cw_ccw=l, enable=h) ? half step a (mode0=h, mode 1=l, cw_ccw=l, enable=h) 1 7 5 100% 67%33% 8 4 6 2 out1a out2b out2a out1b 8clk = electrical angle 360 100% 67%33% -33%-67% -100% 100% 67%33% -33%-67% -100% 1 4 3 2 100% 67%33% out2b out1b out2a out1a 4clk = electrical angle 360 iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a 100% 67%33% -33%-67% -100% 100% 67%33% -33%-67% -100% 3 iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a downloaded from: http:///
13/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 ? half step b(mode0=l, mode 1=h, cw_ccw=l, enable=h) ? quarter step(mode0=h, mode 1=h, cw_ccw=l, enable=h) 1 7 5 3 100% 67%33% 8 4 6 2 out1a out2b out2a out1b 8clk = electrical angle 360 100% 67%33% -33%-67% -100% 100% 67%33% -33%-67% -100% out1a 1 13 9 5 100% 67%33% 2 7 11 1 3 14 1210 4 6 15 2 16 8 out1b out2a out2b 16clk = electrical angle 360 100% 67%33% -33%-67% -100% 100% 67%33% -33%-67% -100% iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a downloaded from: http:///
14/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 ? reset timing chart (quarter step, mode 0=h, mode1=h, cw_ccw=l , enable=h) if the terminal ps is input to l, the reset operation is done with regardless of other input signals when reset the translator circuit while motor is working. at this time, ic internal circuit enters the stan dby mode, and makes the motor output open. ? cw_ccw switch timing chart (full step, mode0=l, mode1=l, enable=h) the switch of cw_ccw is reflected by the rising edge of cl k that comes immediately after the changes of the cw_ccw signal. however, depending on the state of operation of the motor at the switch t he motor cannot follow even if the control on driver ic side is correspondent and there are possibilities of step-out and mistake step in motor, so please evaluate the sequence of the switch enough. cw ccw cw _ ccw iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a 100% -100% 100% -100% reset iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a 100% 67%33% -33%-67% -100% 100% 67%33% -33%-67% -100% downloaded from: http:///
15/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 ? enable switch timing chart (full st ep, mode0=l, mode1=l, enable=h) the switch of the enable signal is reflected by the change in the enable signal with regardless of other input signals. in the section of enable=l, the motor output becomes o pen and the electrical angle doesn't advance. because the translator circuit stop and clk input is canc eled. therefore, the progress of enable=l h is completed before the input of enable=l. excitation mode (mode0, mode1) also switches within enable=l interval. where excitation mode switched within enable=l interval, restoring of enable=l h was done in the excitation mode after switch. restoring in the state prior to input of enable=l ? about the switch of the motor excitation mode the switch of the excitation mode can be done with regardless of the clk signal at the same time as changing of the signal mode0 and mode1. the following built-in func tion can prevent motor out-of-step caus ed by discrepancies of torque vector of transitional excitations during switch between excitation modes. however, due to operation state of motor during switch, motor may not act following control on ic side of controller, and thereby lead to out-of-step or miss step. therefore, switch sequence shall be evaluated suff iciently before any decision. ? cautions of bidirectional switch of cw_ccw and excitation modes (mode0,mode1) as shown in the figure below, the area between the end of reset discharge (ps=l h) and beginning of the first clk signal input is defined as interval a, while the area post the en d of the first clk signal input is defined as interval b. interval a l p for cw_ccw, no limitation is applied on switch of excitation mode. interval b => in clk1 period, or within enable=l interval, cw_ccw and excitation mode cant be switched together. violation of this restriction may lead to false st ep (with one extra leading phase) or out-of-step. therefore, in case that cw_ccw an d excitation modes are switched simultaneously, ps terminal must be input with reset signal. then start to operate in interval a before carrying out such bidirectional switch. output off & translator stop enable iout(ch1) iout(ch2) out2b ps clk out1a out1b out2a 100% -100% 100% -100% g g ps clk interval a interval b downloaded from: http:///
16/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 power dissipation please confirm that the ics chip temperature tj is not over 150 , while considering the ics power consumption (w), package power (pd) and ambient temperature (ta). when tj=150 is exceeded the functions as a semiconductor do not operate and problems such as parasitism and leaks occur. cons tant use under these circumstances leads to deterioration and eventually destruction of the ic. tjmax=150 must be strictly obeyed under all circumstances. thermal calculation the ics consumed power can be estimated roughly with the power supply voltage (v cc ), circuit current (i cc ), output on resistance (r onh ? r onl ) and motor output current value (i out ). the calculation method during full step dr ive, slow decay mode is shown here: consumed power of the vcc [w] = v cc [v] ? i cc [a] ??????? consumed power of the output dmos [w] = (r onh [ ] + r onl [ ]) ? i out [a] 2 ? 2[ch] ? on_duty during output on + (2 ? r onl [ ]) ? i out [a] 2 ? 2[ch] ? (1 - on_duty) ??????? during current decay however, on duty: pwm on duty = t on / (t chop ) t on varies depending on the l and r values of the motor coil and the current set value. please confirm by actual measurement, or make an approximate calculation. t chop is the chopping period, which depends on the external cr. see p.9 for details . ic number upper pchdmos on resistance r onh [ ] (typ.) lower nchdmos on resistance r onl [ ] (typ.) BD63720AEFV 0.40 0.25 consumed power of tota l ic w_total [w] = + junction temperature tj = ta[ ] + ja [ /w] ? w_total [w] however, the thermal resistance value ja [ /w] differs greatly depending on circuit board conditions. refer to the derating curve on p.21.also, we are taking measurements of thermal resistance value ja of boards actually in use. please feel free to contact our salesman. the calculated va lues above are only theoretical. for actual thermal design, please perform sufficient thermal evaluation for the applicat ion board used, and create the thermal design with enough margin to not exceed tjmax=150 .although unnecessary with normal use, if the ic is to be used under especially strict heat conditions, please consider externally atta ching a schottky diode between the motor output terminal and gnd to abate heat from the ic. temperature monitoring in respect of BD63720AEFV, there is a way to directly measur e the approximate chip temperat ure by using the test terminal with a protection diode for prevention from electrostatic dischar ge. however, temperature monitor using this test terminal is only for evaluation and experimenting, and mu st not be used in actual usage conditions. (1) measure the terminal voltage when a current of idiode=50 a flows from the test term inal to the gnd, without supplying vcc to the ic. this measurement is of the vf voltage inside the diode. (2) measure the temperature characteristics of this terminal voltage. (vf has a linear negat ive temperature factor against the temperature.) with the results of t hese temperature characteristics, chip temperature may be calibrated from the test terminal voltage. (3) supply vcc, confirm the test terminal voltage wh ile running the motor, and the chip temperature can be approximated from the results of (2). figure.7 model diagram for measuring chip temperature -vf[mv] 25 150 chip temperature t j [ ] test internal circuit vf internal circuit idiode vcc downloaded from: http:///
17/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 example for applied circuit figure.8 BD63720AEFV block diagram and applied circuit diagram 0.2 0.2 test terminal applied upon connecting with gnd refer to p7 for detail resistor for current detection setting range is 0.1 ? 0.3 . refer to p.6 for detail. 39k 1000pf set the chopping frequency. setting range is c:470pf 1500pf r:10k ? 200k refer to p.6, 9 for detail. bypass capacitor. setting range is 100uf 470uf(electrolytic) 0.01uf 0.1uf(multilayer ceramic etc.) refer to p.6 for detail. be sure to short vcc1 & vcc2. resistor for current detection setting range is 0.1 ? 0.3 . refer to p.6 for detail. predriver 7 vcc1 blank time pwm control translator 2bit dac tsd uvlo regulator reset 9 gnd 10 c r 12 mth 14 ps 15 cl k 18 mode0 19 mode1 16 cw_ccw 20 enable vref 13 2 out1b 5 out1a 3 rnf1 22 vcc2 24 out2a 1 gnd 27 out2b 26 rnf2 17 test control logic mix decay control ocp osc rnf1s 4 rnf2s 25 ovlo rnf1s rnf2s 0.1f 100f set the output current. input by resistor division. refer to p.6 for detail. set the current decay mode. slow decay ? connect to gnd. mix decay ? input by resistor division. refer to p.7, 10 for detail. logic input terminal see p5 for detail. power save terminal refer to p.5 for detail. downloaded from: http:///
18/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 input output equivalent circuit diagram figure.9 input output equivalent circuit diagram 10k 100k circuitry vcc cw_ccw mode1 enable ps vref mth 5k vcc circuitry rnf1, rnf2 out1b out2b out1a out2a rnf1s rnf2s 5k cr 5k 5k 5k vreg (internal regulator) 215k 100k circuitry vcc clk mode0 10k circuitry downloaded from: http:///
19/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 operational notes 1. reverse connection of power supply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when connecting the power supply, such as mounting an external diode between the power supply and the ics power supply pins. 2. power supply lines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital bloc k from affecting the analog block. furthermore, connect a capacitor to ground at all powe r supply pins. consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of t he ground pin at any time, even during transient condition. 4. ground wiring pattern when using both small-signal and large-current ground traces , the two ground traces should be routed separately but connected to a single ground at the refe rence point of the application board to avoid fluctuations in the small-signal ground caused by large currents. also ensure that the ground trac es of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedance. 5. thermal consideration should by any chance the power dissipation rating be exceed ed the rise in temperature of the chip may result in deterioration of the properties of the ch ip. the absolute maximum rating of the pd stated in this specification is when the ic is mounted on a 70mm x 70mm x 1.6mm glass epox y board. in case of exceeding this absolute maximum rating, increase the board size and copper area to prevent exceeding the pd rating. 6. recommended operating conditions these conditions represent a range within which the ex pected characteristics of the ic can be approximately obtained. the electrical characteristics are guaranteed under the conditions of each parameter. 7. inrush current when power is first supplied to the ic, it is possi ble that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if the ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiri ng, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low-impedance output pin may subject the ic to stress. always dischar ge capacitors completely after each process or step. the ics power supply should always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground the ic during assembly and use similar precautions during transport and storage. 10. inter-pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pc b. incorrect mounting may result in damaging the ic. avoid nearby pins being shorted to each ot her especially to ground, power supply and output pin. inter-pin shorts could be due to many reasons such as me tal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assembly to name a few. downloaded from: http:///
20/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 operational notes C continued 11. unused input pins input pins of an ic are often connected to the gate of a mos transis tor. the gate has extremely high impedance and extremely low capacitance. if left unconnected, the electr ic field from the outside can easily charge it. the small charge acquired in this way is enough to produce a signifi cant effect on the conduction through the transistor and cause unexpected operation of the ic. so unless otherwise specified, unused in put pins should be connected to the power supply or ground line. 12. regarding the input pin of the ic this monolithic ic contains p+ isolation and p substrat e layers between adjacent elements in order to keep them isolated. p-n junctions are formed at the intersection of t he p layers with the n layers of other elements, creating a parasitic diode or transistor. for example (refer to figure below): when gnd > pin a and gnd > pin b, the p-n junction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes inevitably occur in the structure of the ic . the operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical dam age. therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the gnd voltage to an input pin (and thus to the p substrate) should be avoided. figure 10. example of monolithic ic structure 13. area of safe operation (aso) operate the ic such that the output voltage, output curren t, and power dissipation are all within the area of safe operation (aso). 14. thermal shutdown circuit(tsd) this ic has a built-in thermal shutdown circuit that pr events heat damage to the ic. normal operation should always be within the ics power dissipation rating. if however the rating is exceeded for a continued period, the junction temperature (tj) will rise which will activate the tsd circui t that will turn off all output pins. when the tj falls below the tsd threshold, the circuits are autom atically restored to normal operation. note that the tsd circuit operates in a situation that exceed s the absolute maximum rati ngs and therefore, under no circumstances, should the tsd circuit be used in a set desi gn or for any purpose other t han protecting the ic from heat damage. 15. over current protection circuit (ocp) this ic incorporates an integrated overcu rrent protection circuit that is acti vated when the load is shorted. this protection circuit is effective in preventing damage due to sudden and unexpected incidents. however, the ic should not be used in applications characterized by continuous operation or transitioning of the protection circuit. 16. operation under strong elect romagnetic field (BD63720AEFV) the ic is not designed for using in the presence of str ong electromagnetic field. be sure to confirm that no malfunction is found when using the ic in a strong electromagnetic field. 17. metal on the backside (define the side where product markings are printed as front) (BD63720AEFV) the metal on the backside is shorted with the backside of ic chip therefore it should be c onnected to gnd. be aware that here is a possibility of malfunction or destruction if it is shorted with an y potential other than gnd. 18. test terminal (BD63720AEFV) be sure to connect test pin to gnd. downloaded from: http:///
21/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 thermal derating curve htssop-b28 has exposed metal on the back, and it is possible to dissipate heat from a through hole in the back. also, the back of board as well as the surfaces has large areas of copper foil heat dissipation patterns, greatly increasing power dissipation. the back metal is shorted with the back side of the ic chip, being a gnd potential, therefore there is a possibility for malfunction if it is shorted with any potential other than gnd, which should be avoided. also, it is recommended that the back metal is solder ed onto the gnd to short. please note that it has been assumed that this product will be used in the condition of this back metal performed heat dissipation treatment for increasing heat dissipation efficiency. figure.11 htssop-b28 thermal derating curve ambient temperature:ta[c] power dissipation pd[w] 1.0 100 125 0 4.70w 4 3.30w 3 1.85w 2 1.45w 1 2.0 3.0 4.0 5.0 measurement machine th156 kuwano electric measurement condition rohm board board size 70mm*70mm*1.6mm (with through holes on the board) the exposed metal of the backside is connected to the board with solder. board 1-layer board (copper foil on the back 0mm) board 2-layer board (copper foil on the back 15mm*15mm) board 2-layer board (copper foil on the back 70mm*70mm) board 4-layer board (copper foil on the back 70mm*70mm) board ja =86.2c w board ja =67.6c w board ja =37.9c w board ja =26.6c w 50 25 85 75 150 downloaded from: http:///
22/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 selecting a model name when ordering b d 6 3 7 2 0 a efv - e 2 rohm model package type efv : htssop-b28 packing, forming specification e2: reel-wound embossed taping marking diagram htssop-b28 (top view) bd63720aef part number marking lot number 1pin mark downloaded from: http:///
23/23 datasheet datasheet BD63720AEFV tsz02201-0p2p0b700450-1-2 ? 2014 rohm co., ltd. all rights reserved. 4.mar.2014 rev.001 www.rohm.com tsz22111 ? 15 ? 001 physical dimension, tape and reel information package name htssop-b28 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape (with dry pack) tapequantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs e2 () direction of feed reel 1pin downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class | class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:///

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