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| 1/11 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. reversible motor driv ers for brush motors 1.0a or more reversible motor drivers (2 motors) BA6247FP-Y, ba6238a description the reversible motor driver for output 1.0a or more for two motors drives a brush motor and incorporates one and a half circuits of reversible motor driver. in addition, since the out put section can control voltage applied to motors by output high voltage setting pin, the torque at the ti me of driving motors can be varied. features 1) built-in one and a half circuits of a reversible motor driver 2) minimal external components 3) output voltage can be optionally set by reference voltage setting pin 4) built-in thermal shutdown circuit applications audio-visual equipment; pc peripherals; car audios; car navigation systems; oa equipments absolute maximum ratings (ta=25 , all voltages are with respect to ground) parameter symbol ratings unit BA6247FP-Y ba6238a supply voltage vcc1, vcc2 20 20 v output current i omax 1* 1 1.6* 1 a control input pins v in -0.2 ~ 6.0 -0.3 ~ 5.0 v operating temperature t opr -25 ~ 75 -25 ~ 75 storage temperature t stg -55 ~ 150 -55 ~ 125 power dissipation pd 1.45* 4 2.0* 2 / 0.95* 3 w junction temperature t jmax 150 125 *1 do not, exceed pd or aso (pulse at 1/50 duty: 50ms). *2 hsip10 package. derated at 20mw/ above 25 . *3 sip10 package. derated at 9.5mw/ above 25 . *4 hsop25 package. mounted on a 70mm x 70mm x 1.6mm fr 4 glass-epoxy board with less than 3% copper foil. derated at 11.6mw/ above 25 . operating conditions (ta=25 ) parameter symbol ratings unit BA6247FP-Y ba6238a supply voltage vcc1, 8 ~ 18 8 ~ 18 v supply voltage vcc2 8 ~ 18 8 ~ 18 v vref voltage vr 0 ~ 18 0 ~ 18 v no.11008ebt04
technical note 2/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. electrical characteristics (BA6247FP-Y, unless otherwise specified, ta=25 and vcc1=vcc2=12v) parameter symbol limits unit conditions min. typ. max. supply current i cc - 10 20 ma in1, in2, in3=l input threshold voltage h v ih 3.5 - - v input threshold voltage l v il - - 1.0 v output voltage h v oh 10 10.5 - v i o =0.5a, vr=open output voltage l v ol - 0.9 1.5 v i o =0.5a output leak current i ol - - 1 ma in1, in2, in3=l, vcc2 current output offset voltage v ofs -0.5 0 0.5 v vr=6v, i o =0.5a, v oh -vr vr bias current i 8 0.5 0.8 1.6 ma vr=6v, i o =0.5a electrical characteristics (ba6238a, unless otherwise specified, ta=25 and vcc1=vcc2=12v) parameter symbol limits unit conditions min. typ. max. supply current i cc - 12 24 ma in1, in2, in3=l, r l = input threshold voltage h v ih 4.0 - - v input threshold voltage l v il - - 1.0 v output voltage h v oh 10.0 10.5 - v i o =0.5a, vr=open output voltage l v ol - 0.8 1.5 v i o =0.5a, vr=open output leak current i ol - - 1 ma in1, in2, in3=l, r l = , vcc2 current output offset voltage v ofs -0.5 0 0.5 v vr=6v, i o =0.5a, v oh -vr vr bias current i 8 0.2 0.6 1.5 ma vr=6v, i o =0.5a technical note 3/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (reference data) fig.1 supply current fig.2 supply current (BA6247FP-Y) (ba6238a) fig.3 output high voltage fig.4 output high voltage (BA6247FP-Y) (ba6238a) fig.5 output low voltage fig.6 output low voltage (BA6247FP-Y) (ba6238a) fig.7 thermal derating curve fig.8 thermal derating curve (BA6247FP-Y, hsop25) (ba6238a, hsip10) 4 6 8 10 12 14 16 8 10 1214 1618 supply voltag e: vcc [v] supply cur rent: icc [ma] -25 25 75 6 8 10 12 14 16 18 8 1012 141618 supply voltag e: vcc [v] supply curr ent: icc [m a] 75 25 -25 7.0 7.5 8.0 8.5 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output high voltage: voh [v] 75 25 -20 8 9 10 11 12 0 0.4 0.8 1.2 1.6 output current: iout [a] output high voltage: voh [v] 75 25 -25 0.0 0.3 0.6 0.9 1.2 1.5 0 0.2 0.4 0.6 0.8 1 output current: iout [a] output low voltage: vol [v] -25 25 75 0.0 0.4 0.8 1.2 1.6 0 0.4 0.8 1.2 1.6 output current: iout [a] output low voltage: vol [v] -25 25 75 0 1 2 3 0 25 50 75 100 125 150 ambient temperature [c] pd [w] i) 2.0w i) without heat sink 0 1 2 3 0 25 50 75 100 125 150 ambient temperature [c] pd [w] i) 0.85w ii) 1.45w ii) mounted on rohm standar d pcb (70mm x 70mm x 1.6mm fr4 glass-epoxy board) i) packag e only technical note 4/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration BA6247FP-Y fig.9 BA6247FP-Y table 1 BA6247FP-Y pin name function 1 out3 driver output 2 nc nc 3 nc nc 4 nc nc 5 in1 control input 6 in2 control input 7 gnd gnd 8 in3 control input 9 vcc1 power supply (small signal) 10 nc nc 11 nc nc 12 nc nc 13 nc nc 14 vr reference voltage setting pin 15 nc nc 16 vcc2 power supply (driver stage) 17 nc nc 18 out1 driver output 19 gnd gnd 20 gnd gnd 21 nc nc 22 out2 driver output 23 nc nc 24 nc nc 25 nc nc fin gnd gnd r3 c4 c1 r2 r1 c5 m m c2 c3 14 9 16 1 18 22 5 6 8 ctrl tsd in1 in2 in3 vcc2 vcc1 vr out2 out1 out3 7 19 gnd 20 fin gnd fig.10 BA6247FP-Y (hsop25) out3 nc gnd nc nc in1 in2 gnd in3 vcc1 nc nc nc nc nc nc gnd nc out2 nc gnd gnd out1 nc vcc2 nc vr technical note 5/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration ba6238a fig.11 ba6238a table 2 ba6238a pin name function 1 gnd gnd 2 out2 driver output 3 out3 driver output 4 in1 control input 5 in2 control input 6 in3 control input 7 vcc1 power supply (small signal) 8 vr reference voltage setting pin 9 vcc2 power supply (driver stage) 10 out1 driver output r3 c4 c1 r2 r1 c5 m m c2 c3 1 8 7 9 3 10 2 4 5 6 ctrl tsd in1 in2 in3 vcc2 vcc1 vr gnd out2 out1 out3 fig.12 ba6238a (hsip10) gnd out2 out3 in1 in2 in3 vcc1 vr vcc2 out1 technical note 6/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. external application components 1) resistor for the current limitation, r1 this is a current limiting resistor for collector loss reducti on and at the time of short-circuited output. it depends on the power supply voltage used, etc., but choose resistance of about 5 to 10 ? . in addition, set resistance with utmost care to voltage drop caused by inrush current that flows when the motor is started. 2) resistors and zener diode for the output high voltage setting, r2, r3 and zd these are the resistors and zener diode used when output high voltage is set. zener diode zd is recommended to be used instead of resistor r3 when the power supply voltage is unstable. 3) stabilization capacitor for the power supply line, c1 please connect the capacitor of 1 f to 100 f for the stabilization of the power supply line, and confirm the motor operation. 4) phase compensating capacitor, c2, c3, c4, c5 noise is generated in output pins or oscillation results in accord with the set mounting state such as power supply circuit, motor characteristics, pcb pattern artwork, etc. as noise oscillation measures, connect 0.01 f to 0.1 f capacitors. functional descriptions 1) operation modes table 3 logic table, BA6247FP-Y / ba6238a in1 in2 in3 out1 out2 out3 operation l l l l l l brake (stop) h h l l h l open* motor 1, forward (out1 > out2) h l h open* motor 1, reverse (out2 > out1) l h l h open* l motor 2, forward (out1 > out3) h l open* h motor 2, reverse (out3 > out1) h h l l l l brake (stop) h * open is the off state of all output transistors. please note that this is the state of the connected diodes, which differs from that of the mechanical relay. technical note 7/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 2) output high voltage setting this function optionally sets output voltage by the vr pi n and controls the motor rotating speed. however, when the output high voltage is set to a low level, consumption at ic increases. carry out thermal design with sufficient margin incorporated with the power dissipation (pd) under the ac tual application condition taken into account. please do not to exceed the vcc1 and vcc2 voltage forced to the vr pin voltage. a) BA6247FP-Y the circuit diagram associated with the output high voltage setting vr pin is as per shown on the right. the output high and low voltages v oh and v ol are expressed by: v oh = vr + ( v f(q5) + v f(q4) ) - ( v f(q2) + v f(q3) ) v oh vr v ol = v sat(q7) + v f(q6) (reference values; v sat 0.2v, v f 0.7v) in addition, the relation of vr ef voltage to output voltage is expressed by: vr < vcc1 - v sat(q1) - v f(q4) - v f(q5) vr < vcc2 - v sat(q3) + (v f(q2) +v f(q3) ) - ( v f(q4) + v f(q5) ) therefore, when the vr voltage condition is as follows, the output high voltage is restricted. vr > vcc1 - v sat(q1) - v f(q4) - v f(q5) vr > vcc2 - v sat(q3) + (v f(q2) +v f(q3) ) - ( v f(q4) + v f(q5) ) v oh = vcc1 - v sat(q1) - v f(q2) - v f(q3) v oh = vcc2 - v sat(q3) b) ba6238a the circuit diagram associated with the output high voltage setting vr pin is as per shown on the right. the output high and low voltages v oh and v ol are expressed by: v oh = vr + ( v f(q5) + v f(q4) ) - ( v f(q2) + v f(q3) ) v oh vr v ol = v sat(q7) + v f(q6) (reference values; v sat 0.1v, v f 0.7v) in addition, the relation of vref volt age to output voltage is expressed by: vr < vcc1 - v sat(q1) - v f(q4) - v f(q5) vr < vcc2 - ( v sat(q2) + v f(q3) ) + (v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) therefore, when the vref voltage cond ition is as follows, the output high voltage is restricted. vr > vcc1 - v sat(q1) - v f(q4) - v f(q5) vr > vcc2 - ( v sat(q2) + v f(q3) ) + (v f(q2) + v f(q3) ) - ( v f(q4) + v f(q5) ) v oh = vcc1 - v sat(q1) - v f(q2) - v f(q3) v oh = vcc2 - v sat(q2) - v f(q3) vcc2 vcc1 vr q1 q2 q3 q4 q5 out gnd q6 q7 fig.13 BA6247FP-Y vcc2 vcc1 vr q1 q2 q3 q4 q5 out gnd q6 q7 fig.14 ba6238a technical note 8/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 3) control input conditions the input threshold voltage has a positive te mperature coefficient and is expressed by: vih = +2.8mv / vil = +1.6mv / t t the input pin is pulled up at about 15k ? . set input voltage with care not to exceed the maximum input volt age (internal voltage regulator). BA6247FP-Y 6v ba6238a 5v 4) switching of rotating direction (fwd/rev) when the rotating direction is changed over by the motor rota ting condition, switch the direction after the motor is temporarily brought to the brake condition or open conditi on. it is recommended to keep the relevant conditions as follows: via brake: longer than braking time*. (* the time required for the output l terminal to achieve potential below gnd when brake is activated.) the motor in no drive might be influenced momentar ily because the all driver outputs low at the brake. interfaces (BA6247FP-Y) (ba6238a) fig. 15 in1, in2, in3 fig.16 vcc1 , vcc2, out1, out2, out3, vr, gnd vcc2 vcc1 out1 out2 out3 gnd vr vcc2 vcc1 out1 out2 out3 vr gnd in1 in2 in3 5k 15k 7k vreg technical note 9/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. notes for use 1) absolute maximum ratings devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum rating. because the cause of this damage cannot be identified as, for example, a short circuit or an open circuit, it is important to consider circuit protection measures ? such as adding fu ses ? if any value in excess of absolute maximum ratings is to be implemented. 2) connecting the power supply connector backward connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when connecting the power supply lines, such as adding an external direction diode. 3) power supply lines return current generated by the motor?s back-emf requires countermeasures, such as providing a return current path by inserting capacitors across the power supply and gnd ( 10f, ceramic capacitor is recommended). in this case, it is important to conclusively confirm that none of the negative effects sometimes seen with electrolytic capacitors ? including a capacitance drop at low temperatures - occu rs. also, the connected power supply must have sufficient current absorbing capability. otherwise, the regenerated curr ent will increase voltage on the power supply line, which may in turn cause problems with the product, including peripheral circuits exceeding the absolute maximum rating. to help protect against damage or degradation, physical safety measures should be taken, such as providing a voltage clamping diode across the power supply and gnd. 4) electrical potential at gnd keep the gnd terminal potential to the minimum potential under any operating condition. in addition, check to determine whether there is any terminal that provides voltage below gnd, including the voltage during transient phenomena. when both a small signal gnd and high current gnd are present, single-point grounding (at the set?s reference point) is recommended, in order to separate t he small signal and high current gnd, and to ensure that voltage changes due to the wiring resistance and high current do not affect the voltage at the small signal gnd. in the same way, care must be taken to avoid changes in the gnd wire pattern in any external connected component. 5) thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation (pd) under actual operating conditions. 6) inter-pin shorts and mounting errors use caution when positioning the ic fo r mounting on printed circuit boards. the ic may be damaged if there is any connection error, or if pins are shorted together. 7) operation in strong electromagnetic fields using this product in strong electromagnetic fields may cause ic malfunctions. use extreme caution with electromagnetic fields. 8) aso - area of safety operation when using the ic, set the output transistor so that it does not exceed absolute maximum ratings or aso. 9) built-in thermal shutdown (tsd) circuit the tsd circuit is designed only to shut the ic off - when ba6238a driver outputs low - to prevent thermal runaway. it is not designed to protect the ic or guarantee its operation in the presence of extreme heat. do not continue to use the ic after the tsd circuit is activated, and do not operate the ic in an environment where activation of the circuit is assumed. BA6247FP-Y ba6238a t on [ ] 170 150 t hys [ ] 30 50 *all temperature values are typical. 10) capacitor between output and gnd in the event a large capacitor is connected between the output and gnd, if vcc and vin are short-circuited with 0v or gnd for any reason, the current charged in the capacitor fl ows into the output and may destroy the ic. use a capacitor smaller than 1 f between output and gnd. technical note 10/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 11) testing on application boards when testing the ic on an application board, connecting a capaci tor to a low impedance pin subjects the ic to stress. therefore, always discharge capacitors after each process or step. always turn the ic's power supply off before connecting it to or removing it from t he test setup during the inspection proc ess. ground the ic during assembly steps as an antistatic measure. use similar prec aution when transporting or storing the ic. 12) switching of rotating direction (fwd/rev) when the rotating direction is changed over by the motor rota ting condition, switch the direction after the motor is temporarily brought to the brake condition or open conditi on. it is recommended to keep the relevant conditions as follows: via brake: longer than braking time*. (* the time required for the output l terminal to achieve potential below gnd when brake is activated.) 13) regarding the input pin of the ic this monolithic ic contains p+ isolat ion and p substrate layers between adjac ent elements, in order to keep them isolated. p-n junctions are formed at the intersection of these p layers with t he n layers of other elements, creating a parasitic diode or transistor. for example, the relation between each potential is as follows: 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, as well as operating malfuncti ons and physical damage. therefor e, do not use methods by which parasitic diodes operate, such as applying a voltage lo wer than the gnd (p substrate) voltage to an input pin. fig.17 example of monolithic ic structure 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 pin b other adjacent elements e b c gnd parasitic element n technical note 11/11 BA6247FP-Y,ba6238a www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ordering part number b a 6 2 4 7 f p - y e 2 part no. part no. 6247 6238a package fp-y: hsop25 none: hsip10 packaging and forming specification e2: embossed tape and reel none: tube (unit : mm) hsop25 7.8 0.3 5.4 0.2 2.75 0.1 1.95 0.1 25 14 1 13 0.11 1.9 0.1 0.36 0.1 12.0 0.2 0.3min. 0.25 0.1 13.6 0.2 0.8 (max 13.95 include burr) s 0.1 s ? order quantity needs to be multiple of the minimum quantity. r1120 a www.rohm.com ? 2011 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 produc ts. 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, redundancy, 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, aerospace 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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