1/4 rev. b structure silicon monolit hic integrated circuits product series 3-phase motor driver for vtr capstan type BA6878EFV function ? 180, 3-phase full-wave pseudo-linear drive system ? built-in current limit and thermal shut down circuits absolute maximum ratings (ta=25 ) parameter symbol limit unit supply voltage vcc 7 v vm 23 v power dissipation pd 1.1 1 w input voltage vin 0 vcc v maximum output current iout 1500 2 ma operating temperature range topr -25 +75 storage temperature range tstg -55 +150 junction temperature tjmax 150 1 70mm 70mm 1.6mm glass epoxy board. derating in done at 8.8mw/ for operating above ta=25 . 2 do not, however exceed pd, aso and tjmax=150 . recommended operating conditions (ta= -25 +75 ) parameter symbol min typ max unit supply voltage vcc 4.5 5.0 5.5 v vm 4.5 12 22.0 v hall amp in-phase input voltage range vch 1.5 - vcc-1.5 v this product described in this specification isn?t judged whether it applies to cocom regulations. please confirm in case of export. this product isn?t designed for prot ection against radioactive rays.
2/4 rev. b electrical characteristics (unl ess otherwise specified, ta=25 , vcc=5v, vm=12v) parameter symbol limit unit conditions min typ max cap drv circuit current icc - 7.4 11.0 ma ec=gnd, input llh hall input conversion offset heofs -6 0 6 mv torque reference start voltage ecst 2.35 2.50 2.65 v output idling voltage ecidle - 0 10 mv ec=gnd torque reference input gain gio 0.64 0.77 0.90 a/v forward rotation reference voltage range vedf - - 2.2 v reverse rotation reference voltage range vedr 2.8 - - v torque limit current itl 0.89 1.00 1.11 a rnf=0.5 high output voltage voh 1.20 1.55 1.90 v iout=-0.8a low output voltage 1 vol 1.10 1.55 2.00 v iout=0.8a, rnf=0.5 ,ec<4.5v low output voltage 2 vol2 1.05 1.50 1.95 v iout=0.8a, rnf=0.5 ,ec=vcc low-side saturation prevention off voltage voff 4.5 4.7 4.9 v fg amp fgin- input current ifgin- -21 -43 -65 a fg amp gain1 gfg1 26 33 - db f=500hz fg amp gain2 gfg2 26 33 - db f=30khz dc bias voltage vbfg 2.4 2.5 2.6 v high fg output voltage vfgh - 0.3 0.6 v ifg=-0.2ma, vfgh=vcc-fgout low fg output voltage vfgl - 0.2 0.5 v ifg=1ma hys amp hysteresis width vhys 32 46 60 mv low hysteresis output voltage vhysl - 0.17 0.39 v ihys=1ma output pull-up resistance rhys 15 20 25 k
3/4 rev. b package outline block diagram pin no. / pin name pin no. pin name 1 a3 2 vcc 3 gnd 4 fgout 5 pci 6 pcv 7 ec 8 ed/s 9 hysout 10 fgin- 11 n.c 12 n.c 13 n.c 14 n.c 15 h3- 16 h3+ 17 h1- 18 h1+ 19 h2- 20 h2+ 21 vm 22 a1 23 a2 24 rnf a3 difference divider matrix csamp tsd vref tl rotation derection vcc a3 a2 a1 - + - + ecamp - + + + - vref + - gnd f out pci pcv ec n.c. rnf ed/s ysout fgin- n.c. a2 a1 vm h2+ h2- h1+ h1- h3- h3+ n.c. n.c. output fg amp hysteresis comparator hall amp saturation prevention circuit BA6878EFV lot no. htssop-b24 (unit: mm) product no.
4/4 rev. b operation notes (1) absolute maximum ratings use of the ic in excess of absolute maximum ratings such as the applied voltage or operating temperature range (topr) may result in ic damage. assumptions should not be made regardi ng the state of the ic (short mode or open mode) when such damage is suffered. the implementation of a physical safety m easure such as a fuse should be considered when use of the ic in a special mode where the absolute maxi mum ratings may be exceeded is anticipated. (2) power supply lines regenerated current may flow as a result of the motor's back el ectromotive force. insert capacitors between the power supply and ground pins to serve as a route for regenerated current. de termine the capacitance in full consideration of all the characteristics of the electrolytic capaci tor, because the electrolytic capacitor may loose some capacitance at low temperature s. if the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circ uitry may exceed the absolute maximum ratings. it is recommended to implement a physical safe ty measure such as the insertion of a voltage clamp diode between the power supply and gnd pins. (3) ground potential ensure a minimum gnd pin potenti al in all operating conditions. (4) setting of heat use a thermal design that allows for a sufficient margin in li ght of the power dissipation (pd) in actual operating conditions. this ic exposes its frame of the backside of package. note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency. try to occupy as wide as possible with heat dissipation pattern not only on t he board surface but also the backside. (5) actions in strong magnetic field use caution when using the ic in the presence of a strong magnetic field as doi ng so may cause the ic to malfunction. (6) aso when using the ic, set the output transistor for the motor so that it does not exceed absolute maximum ratings or aso. (7) thermal shutdown circuit this ic incorporates a tsd (thermal s hutdown) circuit (tsd circuit). if the tem perature of the chip reaches the following temperature, the motor coil output will be opened. the thermal shutdow n circuit (tsd circuit) is des igned only to shut the ic o ff to prevent runaway thermal operation. it is not designed to protec t the ic or guarantee its operation. do not continue to use t he ic after operating this circuit or use the ic in an envi ronment where the operation of this circuit is assumed. tsd on temperature [c] (typ.) hysteresis temperature [c] (typ.) 175 25 (8) ground wiring pattern when using both small signal and large current gnd patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the application's reference point so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal gr ound voltage. be careful not to change the gnd wiring pattern of any external components, either.
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