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1/14 www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. motor drivers for printers three-phase brushless motor driver for polygonal mirrors [for lbp, ppc] BD67929EFV description BD67929EFV is a 3-phase brushless motor driver for polygon mirro r motors of direct pwm drive type built-in pll ensuring. as for its basic function, it is a 3-phase 120 energization direct pwm drive type with power supply rated voltage of 36v and rated output current 2.3a. it is useful for high speed drive. it has the p-mos and d-mos on the ou tput block, and the output on resistance is very low 1.35 (typ.). it is very useful for low power consumption. and this ic is high reliability due to built-in each protection functions (t hermal protection, over current protec tion, restricted protection circuit). features 1) 3-phase mos120 energization, direct pwm drive type 2) high output current: 2.5a 3) low on resistance dmos output 4) pll control circuit 5) phase lock detection circuit 6) current limiting circuit 7) 5v regulator output 8) power-saving function (ss) 9) short brake function (sb) 10) built-in logic input pull-up resistor 11) restricted protection circuit 12) clk un-input protection circuit 13) clk input baffler chattering circuit 14) over current protection circuit (ocp) 15) thermal shutdown circuit (tsd) 16) over voltage lock out circuit (ovlo) 17) under voltage lock out circuit (uvlo) 18) electrostatic discharge: 8kv (hbm standard) applications laser beam printer, ppc, etc. no.10016eat05
technical note 2/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. absolute maximum ratings (ta=25 ) parameter symbol ratings unit supply voltage v cc -0.2 +36.0 v applied voltage of ld, fg terminal v ld , fg -0.2 +6.5 v applied voltage of hb terminal v hb -0.2 +6.5 v input voltage of hall signal v hall -0.2 +6.5 v input voltage of clk v clk -0.2 +6.5 v input voltage of control pin (ss, sbe) v in -0.2 +6.5 v power dissipation pd 1.45 *1 w 4.70 *2 w output current i out 2500 *3 ma operating temperature range t opr -25 +85 storage temperature range t str -55 +150 junction temperature t jmax 150 *1 70mm 70mm 1.6mm glass epoxy board. derating in done at 11.6mw/ for operating above ta=25 *2 mounting on 4-layer board. derating in done at 37.6mw/ for operating above ta=25 . *3 do not, however exceed pd, aso and tlmax=150 . operating conditions (ta=-25 85 ) parameter symbol ratings unit min. typ. max. supply voltage v cc 19 24 28 v output current of 5v regulator i reg -20 - 0 ma input current of hb terminal i hb 0 - 20 ma applied voltage of ld, fg terminal v ld , fg 0 - 5.5 v output current of ld, fg terminal i ld , fg 0 - 15 ma
technical note 3/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. electrical characteristics (unless otherwise specified, ta=25 , v cc =24v) parameter symbol limits unit conditions min. typ. max. whole circuit current 1 i cc1 - 4.0 9.0 ma ss=l, output is on circuit current 2 i cc2 - 1.0 2.3 ma ss=h, output is off vreg output output voltage v reg 4.65 5.00 5.35 v driver block (u, v, w) output on resistance r on - 1.35 1.76 i out =1.0a on high and low side in total forward voltage of diode on low side v d1 0.70 1.10 1.55 v i out =-1.0a forward voltage of diode on high side v d2 0.70 1.10 1.55 v i out =1.0a output leak current i leak - - 10 a hall comparator (hup, hun, hvp, hvn, hwp, hwn) in-phase input voltage range vicm 1.5 - 3.5 v high and low side in total hysteresis voltage v in 15 24 42 mv ld, fg output low output voltage v od - 0.15 0.50 v i ld,fg =10ma pd output high output voltage v pdh 4.5 4.9 - v i pd =-100a low output voltage v pdl - 0.2 0.3 v i pd =100a integral amplifier high output voltage of eo v erh 3.5 4.1 - v i eo =-500a low output voltage of eo v erl - 0.9 1.5 v i eo =500a input current of ei i ei -2.0 -0.1 - a v ei =0v current limiting circuit gain at start up gh 1.2 1.5 1.8 times gain at steady state gl 0.4 0.5 0.6 times limit voltage v rnf 0.45 0.50 0.55 v clk input external input frequency f clk - - 10 khz high level input voltage v clkh 3.0 - - v low level input voltage v clkl - - 1.5 v low level input current i clkl -75 -50 -25 a v clk =0v control input(ss, sb) high level input voltage v inh 3.0 - - v low level input voltage v inl - - 1.5 v low level input current i inl -75 -50 -25 a v in =0v oscillator oscillating frequency f osc 130 200 270 khz c osc =220pf high triangular waveform voltage v osch 1.6 2.0 2.4 v low triangular waveform voltage v oscl 1.2 1.5 1.8 v proclk clk cycle for protection circuit t pclk 13 20 27 msec c pclk =0.1f hall bias hall bias voltage v hb 0.65 0.80 0.95 v i hb =10ma
technical note 4/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. capacitor for noise to hall signal. setting range is 0.01 0.1f. resistor and capacitor for pll control. capacitor for compensation of current feedback roop. capacitor to set the pwm frequency. bypass capacitor. setting range is 47f 470f (electrolytic) 0.01f 0.1f (multilayer ceramic etc.) resistor to detect the motor current. setting range is 0.25 ? 1.00 . resistor to set output signal level of hall element. resistor and capacitor is to reduce the noise of cr terminal. capacitor for internal regulator and regulator for hall element. capacitor to set the detection time for protection circuit. setting range is 0.01f 0.47f. cs vreg test proclk gnd fg ld cl k ss pd eo ei osc cnf hwp hvp hun hup hwn hvn u vcc hb rnf w v vcc 0.01f 100f 1k 330pf 0.1f 0.1f 33pf 10nf 10nf 10nf 0.33 20 17 19 11 13 14 15 10 12 25 27 16 22 3 24 regulator 5 8 2 6 18 4 tsd hall hys comp 7 21 23 reset uvlo ocp ovlo pro_osc logic pwm 1 9 hall bias sb brmode 28 26 pin function pin no pin name function pin no pin name function 1 gnd ground 15 hup hall signal input terminal 2 vcc power supply terminal 16 vreg 5v regulator output terminal 3 fg fg output terminal 17 pd phase comparison output terminal 4 cs current detection comparator input terminal 18 test testing terminal 5 rnf connection terminal of resistor for output current detection 19 ei error amplifier input terminal 6 w output terminal 20 eo error amplifier output terminal 7 v output terminal 21 proclk connection terminal of a capacitor to set the clock cycle for protection 8 u output terminal 22 clk speed control clock input terminal 9 hb bias terminal for hall element 23 ss start/stop signal input terminal 10 hwn hall signal input terminal 24 ld phase locked detection output terminal 11 hwp hall signal input terminal 25 osc connection terminal of capacitor to set pwm oscillating frequency 12 hvn hall signal input terminal 26 brmode switch terminal of deceleration mode in servo 13 hvp hall signal input terminal 27 cnf connection terminal of capacitor for current sense amp 14 hun hall signal input terminal 28 sb short brake signal input terminal block diagram & application circuit diagram block diagram & application circuit diagram
technical note 5/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. terminal function hwp, hvp, hup, hwn, hvn, hun/hall signal input terminal these terminals are the input terminals of the output signals from hall elements. this has the comparator with hysteresis. the width of hysteresis voltage is 12mv(typ.). the output of th is comparator will be high if the voltage of hxp terminal is greater than the voltage of hxn terminal by 12mv, and the level will be low if the voltage of hxp terminal is less than the voltage of hxn terminal by 12mv. for the countermeasures against noise interface with hall inputs, the connection of a capacitor with a capacitance of approximately 0.01 - 0.1f between hxp terminal and hxn terminal. pd/phase comparison output terminal this terminal outputs the signal that is the comparison of fg signal and clk signal. ei/error amplifier input terminal this terminal is the input terminal of the error amplifier. eo/error amplifier output terminal this terminal is the output terminal of t he error amplifier. it is connected to t he input terminal of motor torque command signal inside the ic. clk/speed control clock input terminal this terminal is the clk signal input terminal to control the speed. this terminal has the 100k resistor which is pulled-up to the internal regulator. this block detect the falli ng edge. in case that there is the noise on the clk signal, it makes the miscount of the clk signal. be sure to des ign the pattern without the influence of the noise. ss/start/stop signal input terminal this terminal makes the motor start or stop. this terminal has the 100k resistor which is pulled-up to the internal regulator. ss lo start hi stop when ss=hi, ic becomes stop condition. stop condition is free run or short brake that decided by sb terminal. moreover, it makes the hb terminal off, and shut down the current to the hall element. it is very useful to low power consumption. ld/phase locked detection output terminal when the rotation count of the motor is wi thin 10% of the target rotation count, t he ld terminal becomes lo. this terminal is open drain type output, please connect to the external regulator (0 5.5v recommended) through the resistor. the capability of this terminal is 15ma maximum, pl ease set the voltage of the external regulator and the value of resistor to be within 15ma. osc/connection terminal of capacitor to set pwm oscillating frequency this terminal is the connection terminal of capacitor to make the triangle waveform that set the pwm frequency. f pwm = 44 / c [hz] ex.) when c=220pf, f=200 khz cnf/connection terminal of capacitor of current sense amp. this terminal is the connection terminal of capaci tor to compensate the phase of cs amplifier. sb/short brake signal input terminal this terminal is the input signal terminal that set output c ondition when the voltage of ss is hi. this terminal has the 100k resistor which is pulled-up to the internal regulator. when the voltage of sb terminal turns to lo, all low side mos fet turns to on, and it should be short brake condit ion. it is very useful to reduce the speed quickly. sb stop mode lo short brake mode hi free run mode brmode/pll brake setting terminal this ic has the two kinds of deceleration method. the method is configurable by which terminal to connect with brmode, vreg or gnd terminal. this terminal has the 100k resistor which is pulled-up to the internal regulator. brmode deceleration method gnd short brake vreg free run
technical note 6/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. vreg/5v regulator output terminal this terminal is the connection terminal of capacitor to stabili ze the 5v output of internal regulator. it should be connected with the capacitor (0.01f-1f) to the ground. this terminal is used as the regulator to t he hall element too. the road current should be within 20ma. proclk/connection terminal of a capacitor to set the clock cycle for protection this terminal is the connection terminal of capacitor to set the time of detection. the period of proclk=c 200k[s] ex.) when c=0.1f, the period of proclk=20m[s] hb/bias terminal for hall element this terminal is the open collector type, and low side switch. by connecting the gnd side of hall element to the hb, the bias current of the hall element will be turned off with the ss set to high or open. it is very useful for the low power consumption because the bias cu rrent for hall element will be 0a. fg/fg output terminal this terminal outputs the signal which indicate the rotation count, which is synthesize from hall signal of u-phase. this terminal is open drain type output, it should be pulled-up to the external regulator (0 -5.5v) through the resistor. the capability of fg terminal is 15ma maximum, please set the voltage of external regulator and the value of resistor to be within 15ma. cs/current detection comparator input terminal in this ic, cs terminal, which is the input terminal of curr ent limit comparator, is indepe ndently arranged in order to decrease the lowering of current-detecting accuracy caused by the wire impedance inside the ic of rnf terminal. therefore, please be sure to connect rnf terminal and cs te rminal together when using in the case of pwm constant current control. in addition, be cause the wires from cs terminal is connect ed near the current-detecting resistor in the case of interconnection, the lowering of current-detecting accuracy, which is caused 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 careful because if te rminal of rnf is shorted to gnd, large current flows without normal pwm const ant current control and, then there is danger that ocp or tsd will operate. to reduce the pwm noise influence, please out the filter between rnf terminal and cs terminal. the cut-off frequency is below f = 1 / (2 r1 c1) ex.) when c1=330pf, r1=1khz f=483[khz] u, v, w/output terminal motor's drive current is flowing in it, so please wires in such a way that the wire is thick & short has low impedance. it is also effective to add a shot-key diode if output has positive or negat ive great fluctuation when large current is used etc., for example, if counter electromotive vo ltage etc. is great. moreover, in the output terminal, there is built-in clamp component for preventing of electrostati c destruction. if steep pulse or voltage of surge more that maximum absolute rating is applied, this clamp component oper ates, as a result there is the danger of even destruction, so please be sure that the maximum absolute ra ting must not be exceeded. hall signal fg hun hup cs r1 rnf c1 r rnf
technical note 7/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. gnd/ground terminal in order to reduce the noise caused by switching current a nd 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 ac hieve the lowest electrical potential no matter what operating state it may be. vcc/power supply terminal motor's drive current is flowing in it, so please wire in su ch a way that the wire is thick & short and has low impedance. voltage vcc may have great fluctuation, so pl ease arrange the bypass capacitor of about 47f 470f 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 electr omotive force are used. in addition, for the purpose of reducing of power supply 's impedance in wide frequency bandwidth, parallel connection of multi-layered ceramic capacitor of 0.01f 0.1f etc. is recommended. extreme care must be used to make sure that the voltage vcc does not exceed the rating even for a moment. still more, in the power supply terminal, there is built-in clamp component for preventing of electrostati c destruction. if steep pulse or voltage of surge more that maximum absolute rating is applied, this clamp component op erates, as a result there is the danger of destruction, so please be sure that the maximum absolute rating must not be exceeded. it is effe ctive to mount a zener diode of about the maximum absolute rating. moreover, the diode for prevent ing of electrostatic destruction if reverse voltage is applied between v cc terminal and gnd terminal, so please be careful. rnf/connection terminal of resistor for detecting of output current please connect the resistor of 0.25 ? 1.00 for current detection between this termi nal and gnd. in view of the power consumption of the current -detecting resistor, please determine the resistor in such a way that w=i out 2 ? r[w] does not exceed the power dissipation of the resist or. in addition, please wire in such a way that it has a low impedance and does not have a impedance in common with other gnd patterns becaus e motor's drive current flows in the pattern through rnf terminal current-detecting resistor gnd. please do not exceed the rating because there is the possibility of circuits' malfunction etc. if rnf volt age has exceeded the maximum rating (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 such malfunction as output current does not flow either, so please do not let it open. ic back side metal/metal for heat-radiation for htssop-b28 package, the heat-radiating metal is mount ed on ic's back side, and on the metal the heat-radiating treatment is performed when in use, which becomes the precondition to use, so please secure sufficiently the heat-radiating area by surely connecting by solder with t he gnd plane on the board and getting as wide gnd pattern as possible. please be careful because the allowable loss as shown in page 21 cannot be secured if not connected by solder. moreover, the back side metal is shorted with ic ch ip's back side and becomes the g nd potential, so there is the danger of malfunction and destru ction if shorted with potent ials other than gnd, therefore please absolutely do not design patterns other than gnd through the ic's back side. test terminal/terminal for testing this is the terminal used at the time of shipping tes t. please connect to gnd. please be careful because there is a possibility of malfuncti on if gnd unconnected.
technical note 8/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. servo and pll this ic synchronizes the phase of the reference clk signal and the internal three-phase synthesized fg in motor rpm control. in the control system, the ri sing of the fg signal and the falling of clk signal are monitored and the phase comparison of the two signals is made. t he output signal after the phase comparison is smoothed by the active filter with the above int amplifier used to determine the torque of the motor. the motor rota tes at the torque determined here and the fg signal is generated. the motor rotate s at the number of revolutions according the clk, and the ic goes into servo mode. input and output condition table hall input output fg logic pin no. 15 13 11 8 7 6 3 pin name hup hvp hwp u v w fg condition 1 l h h l h m l condition 2 l l h l m h l condition 3 h l h m l h h condition 4 h l l h l m h condition 5 h h l h m l h condition 6 l h l m h l l hun(35pin)= hvn(33pin)= hwn(31pin)= m timing chart hup hun hvn hvp hwp hwn u v fg w
technical note 9/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. protection circuits thermal shutdown (tsd) this ic has a built-in thermal shutdown circuit for thermal protection. when the ic's 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 operation. however, even when tsd is in oper ation, 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 pr motor output-gnd is shorted. this circuit latc hes the motor output to open condition when the regulated threshold current flows for 4s (typ.). it retu rns with power reactivation or a reset of the ss terminal. the over current protection circuit's 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 circuit's functions. after ocp operating, if irregular situations continues and the return by power reactivation or a reset of the ps terminal is carried out repeatedly, then ocp operates repeatedly and the ic may generate heat or otherwise dete riorate. when the l value of t he wiring is great due to the wi ring 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 curr ent 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 prev ent false operation such as ic output during power supply under voltage. when the applied voltage to the v cc terminal does under 15v (typ.), the motor output is set to open. this switching voltage has a 1v (typ.) hysteresis to prevent fals e operation by noise etc. pleas e be aware that this circuit does not operate during ss=hi 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 motor during power supply over voltage. when the applied voltage to the vcc terminal goes ov er 33v (typ.), the motor output is set to open. this switching voltage has a 1v (typ.) hysteresis and a 4s (typ.) mask time to prevent false oper ation by noise etc. although this over voltage locked out circuit is built -in, there is a possibility of destructi on if the absolute maximum value for power supply voltage is exceeded, therefore t he absolute maximum value should not be exceeded. please be aware that this circuit does not operate during ss=hi mode. restricted protection circuit this ic has a built-in restricted protection circuit for the provision against restricti on of the motor. this circuit sets pd t o h for decreasing the torque when fg signal does not change over for certain time. it returns by re-charging the power supply or resetting by ss terminal. the length of the time fo r detecting the motor lock will be able to set by the value of the capacitor which is connected to proclk terminal. when motor is locked by some reason, pd is changed to h and the motor torque is decreased. the time that is until detecting the lock is set by the value of ca pacitor which is connected to proclk terminal. the period of proclk = c 200k[s] the detecting time to lock = the period of proclk 96 count = c 200k[s] 96 count ex.) when c=0.1f, t= 1.92 [s]. the declination of 1 count may occur by the timing of the count. non input clk protection circuit this ic has a built-in non input clk protection circuit for the provision against breaking of clk. this circuit sets the motor output open when clk signal does not change over for certain time. it returns by re-changing the power supply or resetting by ss terminal. the length of the time for detecting t he state of non input clk will be able to set by the value of the capacitor which is connected to proclk terminal. the period of proclk = c 200k[s] the detecting time to lock t = the period of proclk 3count = c 200k[s] 3count ex.) when c=0.1f, t= 80 [ms]. the declination of 1 count may occur by the timing of the count.
technical note 10/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. power consumption please confirm that the ic's chip temperature tj is not over 150 , while considering the ic's power consumption (w), package power (pd) and ambient temperature (ta). when tj is exceeded 150 , the functions as a semiconductor do not operate and problems such as parasitism and leaks occur. const ant use under these circumstanc es leads to deterioration and eventually destruction of the ic. tjmax=150 must be strictly obeyed under all circumstances. thermal calculation the ic's consumed power can be estimated roughly with t he power supply voltage (vcc), circuit current (icc), output on resistance (r onh , r onl ) and motor output current value (i out ). 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 2 on_duty +{r onl i out 2 +d ivl i out }(1-on_duty) ??? 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 period of chopping which is set by the exte rnal capacitor of osc terminal. see page 5 for detail. high side pch dmos on resistance r onh [ ] (typ.)= 0.70 [ ] low side nch dmos on resistance r onl [ ] (typ.)= 0.65 [ ] consumed power of total 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.10. also, we are taking measurements of thermal resistance value ja of boards actually in use. please feel free to contact our salesman. the calculated val ues above are only theoretical. for actual thermal design, please perform sufficient thermal evaluation for the applic ation board used, and create t he thermal design with enough margin to not exceed tjmax=150 . although unnecessary with normal use, if t he ic is to be used under especially strict heat conditions, please consider externally attaching a sc hottky diode between the motor output terminal and gnd to abate heat from the ic. temperature monitoring there is a way to directly measure t he approximate chip temperature by using the test terminal. however, temperature monitor using this test terminal is only for evaluati on and experimenting, and must not be used in actual usage conditions. test terminal has a protection diode for preventio n from electrostatic discharge. the temperature may be monitored using this protection diode. (1) measure the terminal voltage when a current of idiode= 50a flows from the test terminal 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 termi nal voltage. (vf has a linear negative temperature may be calibrated from the test terminal voltage. (3) supply vcc, confirm the test terminal voltage whil e running the motor, and the chip temperature can be approximated from the results of (2). model diagram for measuring chip temperature -vf[mv] 25 150 t j [ ] test circuitry circuitry idiode vcc v
technical note 11/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. power dissipation htssop-b28 package 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 si de of the ic chip, being a gnd pot ential, therefor e there is a possibility for malfunction if it is shorted with any potential other than gnd, which shou ld be avoided. also, it is recommended that the back metal is soldered 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. htssop-b28 derating curve ambient temperature:ta[ ] 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 70*70*1.6mm 3 (with through holes on the board) board ? 1-layer board(copper foil on the back 0mm 2 ) board ? 2-layer board(copper foil on the back 15*15mm 2 ) board ? 2-layer board(copper foil on the back 70*70mm 2 ) board ? 4-layer board(copper foil on the back 70*70mm 2 ) board ? ja=86.2 /w board ? ja=67.6 /w board ? ja=37.9 /w board ? ja=26.6 /w
technical note 12/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. notes for use (1) absolute maximum ratings an excess in the absolute maximum ratings, such as supply vo ltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify br eaking mode, such as a short circuit or an open circuit. if any over rated values will expect to exceed the absolute ma ximum ratings, consider adding circuit protection devices, such as fuses. (2) connecting the power supply connector backward connecting of the power supply in reverse polarity can damage ic. take precautions when connecting the power supply lines. an external direction diode can be added. (3) power supply lines design pcb layout pattern to provide low impedance gnd and supply lines. to obtain a low noise ground and supply line, separate the ground section and supply li nes of the digital and analog blocks. furthermore, for all power supply terminals to ics, connect a capacitor between the power supply and the gnd terminal. when applying electrolytic capacitors in the circuit, not have sufficient current absorption capacity, rege nerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. it is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. (4) gnd potential the potential of gnd pin must be minimu m potential in all operating conditions. (5) metal on the back side (define the side wher e product markings are printed as front) the metal on the backside is shorted with the backside of ic ch ip therefore it should be connec ted to gnd. be aware that there is a possibility of malfunction or destruction if it is shorted wi th any potential other than gnd. (6) thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation (pd) in actual operating conditions. this ic is equipped with fin heat dissipation terminals, but dissipation efficiency can be improved by applying heat dissipation treatment in this area. it is important to consider actual usage condi tions and to take as large a dissipation pattern as possible. (7) inter-pin shorts and mounting errors when attaching to a printed circuit board, pay close attention to the direction of the ic and displacement. improper attachment may lead to destruction of the ic. (8) operation in a strong electric field use caution when using the ic in the presence of a strong electr omagnetic field as doing so may cause the ic to malfunction. (9) aso when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. (10) thermal shutdown circuit the ic has a built-in thermal shutdown circuit (tsd circuit). if the chip te mperature becomes tjmax=150 , and higher, coil output to the motor will be open. the tsd circuit is des igned only to shut the ic of f to prevent runaway thermal operation. it is not designed to protect or indemnify peri pheral equipment. do not use the tsd function to protect peripheral equipment. tsd on temperature [ ] (typ.) hysteresis temperature [ ] (typ.) 175 25 (11) inspection of the application board during inspection pf the application board, if a capacitor is connected to a pin with low impedance there is a possibility that it could cause stress to the ic, t herefore an electrical discharge should be performed after each process. also, as a measure again electrostatic discharge, it should be earthed during the assembly process and special care should be taken during transport or storage. furthermore, when connecti ng to the jig during the inspection process, the power supply should first be turned off and then removed before the inspection.
technical note 13/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. (12) input terminal of ic this ic is a monolithic ic, and between each element there is a p+ isolation foe element partition and a p substrate. this p layer and each element's n layer make up the p-n junction, and various parasitic elements are made up. for example, when the resistance and transistor are connected to the terminal as shown in figure, when gnd (terminal a) at the resistance and gnd (terminal b) at the transistor (npn), the p-n junction operates as a parasitic diode. also, when gnd (terminal b) at the transistor (npn) the parasitic npn transistor operates with the n layers of other elements close to the aforementioned parasitic diode. because of the ic's structure, the creation of parasitic elements is inevitable from the electrical potential relationship. the operation of parasitic elements causes interference in circ uit operation, and can lead to malfunction and destruction. therefore, be careful not to use it in a way which ca uses the parasitic elements to operate, such as by applying voltage that is lower than the g nd (p substrate) to the input terminal. pattern diagram of parasitic element resistor transistor (npn) n n n p + p + p p substrate gnd parasitic element pin a n n p + p + p p substrate gnd parasitic element pin b c b e n gnd pin a parasitic element pin b other adjacent elements e b c gnd parasitic element
technical note 14/14 BD67929EFV www.rohm.com 2010.12 - rev. a ? 2010 rohm co., ltd. all rights reserved. ordering part number b d 6 7 9 2 9 e f v -e 2 part no. part no. package efv: htssop-b28 packaging and forming specification e2: embossed tape and reel (htssop-b28) (unit : mm) htssop-b28 0.08 m 0.08 s s 1.00.2 0.50.15 4 + 6 ? 4 0.17 +0.05 - 0.03 15 28 14 1 (2.9) 4.40.1 (5.5) (max 10.05 include burr) 0.625 6.40.2 9.70.1 1pin mark 1.0max 0.65 0.850.05 0.080.05 0.24 +0.05 - 0.04 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape (with dry pack) tape quantity 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
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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