1/4 rev. c structure silicon monolithic integrated circuit product series 4ch sensorless system motor driver for md type BD6640KVT features ? operates at low power supply voltage (2.1v min) ? power dmos output with low on resistance (0.8 ? typ.) ? incorporates a charge pum p circuit for vg boost. ? 3-phase full-wave soft-switching sensorless driver for spindle ? 3-value control 3-phase driver for sled (built -in comparator for bemf voltage detection) ? 2ch, 3-value control h-bridges for focus/tracking ? pwm half-bridge for spindle vm power supply absolute maximum ratings(ta=25 ) parameter symbol limit unit power supply voltage for control circuit vcc 7 v power supply voltage for driver block vm 7 v power supply voltage for pre-driver block vg 14 v input voltage vin 0 vcc v output current iomax *500 ma power dissipation pd **1250 mw operating temperature range topr -25 +75 storage temperature range tstg -55 +150 junction temperature tjmax +150 must not exceed pd or aso, tjmax=150 . reduced by 10mw/c over ta=25c, when mounted on a glass epoxy board (70mm ? 70 mm ? 1.6mm). operating conditions (ta=-25 +75c) parameter symbol min. typ. max unit power supply voltage vcc1,2 2.1 2.2 6.5 v vm - - 5.0 v vg 3 6.5 13 v pulse input frequency fin - - 500 khz this product described in this specification is not judged whether it applies to cocom regulations. please confirm in case of export. this product is not designed for pr otection against radioactive rays.
2/4 rev. c electrical c haracteristics (unless otherwise specified, ta=25c, vcc1, 2=2.2v, vm=1.0v, fin=176khz) parameter symbol limit unit conditions min. typ. max. circuit current icc - 4.4 7.0 ma at operation in all blocks ist - 1 10 a at standby in all blocks output on resistance ron - 0.8 1.2 ? upper and lower on resistance in total vg=10v boost circuit output voltage vg1 5.5 6.5 6.7 v each input l vg2 4.4 5.2 v at operation in all blocks oscillation circuit self-propelled oscillating frequency fosc 50 100 160 khz external clock synchronous range fsync 500 khz input from extclk pin spindle (3-phase full-wave sensorless driver) block position detection comparator vco -10 +10 mv detection comparator input range vcd 0 vcc- v cst charge current icto -3.5 -2.1 -0.9 a cst=1v cst discharge current icti 1.0 3.6 7.5 ma cst=1v csl charge current iclo -3.5 -7.5 -13 a csl=0.5v csl discharge current icli 1.2 3.0 6.5 a csl=0.5v csl clamp h voltage vclh 0.7 0.8 0.9 v brake comparator input current ibr 2.0 a brk=vcc brake comparator input offset vbo -15 +15 mv brake comparator input range vbd 0 vcc-1 v fg output pull-up resistance rbf 10 20 30 k ? fg output l voltage volf 0.2 0.3 v io=300 a rib offset voltage vro 10 18 30 mv vm=0v rib=500 ? pre-drive loop gain vrp 500 650 850 mv m-phase check vmck 400 500 600 mv sled, focus, tracking, pwm power supply (st epping, h-bridge, and half-bridge driver) block logic h level input voltage vinh vcc-0.4 vcc v logic l level input voltage vinl 0 0.4 v logic h level input current iinh1 1 a vin=2.2v iinh2 350 600 a vin=2.2v extclk pin logic l level input current iinl -1 a vin=0v output propagation delay time trise 0.2 1 sec tfall 0.1 0.7 sec short pulse response tmin 120 nsec input pulse width 200 ns this product is not designed for pr otection against r adioactive rays.
3/4 rev. c package outlines block diagram no. pin name no. pin name 1 in1r 33 s3 2 in2f 34 bemfu 3 in2r 35 bemfv 4s t all 36 bemfw 5 sthb 37 slcom 6 spvm1 38 slpg2 7 spuout 39 slwout 8 sppg1 40 slvm2 9 n.c 41 slvout 10 spvout 42 slpg1 11 spvm2 43 sluout 12 spwout 44 slvm1 13 sppg2 45 vcc2 14 pwvm 46 vcc1 15 pwout 47 vg 16 pwpg 48 c2m 17 pwin1 49 c2p 18 spuin 50 c1m 19 spvin 51 c1p 20 spwin 52 extclk 21 spcom 53 n.c 22 rib 54 h2pg2 23 cst 55 h2rout 24 csl1 56 h2vm 25 csl2 57 h2fout 26 fg 58 h2pg1 27 brk+ 59 h1pg2 28 brk- 60 h1rout 29 asgnd 61 h1vm 30 sgnd 62 h1fout 31 s1 63 h1pg1 32 s2 64 in1f tqfp64v outlines (unit mm) pin no./pin name BD6640KVT lot no. type s1(31) logic pre drive stand-by charge pump oscillator tsd pre drive spcom (21) spwin (20) spvin (19) spuin (18) brk-(28) brk+(27) c2p (49) c1m (50) c1p (51) in2r (3) predrive in2f (2) predrive in1r (1) in1f (64) vg pw in1 (17) pw1 out (15) ext clk (52) vg (47) spuout (7) rib (22) spvm1,2 (6,11) pre drive befmu (34) slcom (37) decoder matrix ga i n control slope signal csl2 (25) csl1 (24) c2m (48) sthb (5) stall (4) fg (26) cst (23) vcc1, 2 (46,45) brake comparator spvout (10) spwout (12) sppg1,2 (8,13 ) pwvm (14) pwpg (16) asgnd (29) sgnd (30) s2(32) s3(33) befmw (36) sluout (43) slvout (41) slwo ut (39) slvm1,2 (40,44) slpg1,2 (42,38) h2fout (57) h2rout (55) h2vm (56) h2pg1,2 (58,54) h1fout (62) h1rout (60) h1vm (61) h1pg1,2 (63,59) n.c. (9,53) befmv (35) + + b + b ` + ` + ` + ` +
4/4 rev. c notes on the use (1) absolute maximum ratings if the input voltage or the operating temperature range ex ceeds absolute maximum rati ngs, ic may be damaged. no destruction mode (e.g., short- circuiting or open) can be specif ied in that case. if such special mode as will exceed absolute maximum ratings is assumed, take the physical safety measures, such as a fuse. (2) power supply lines the regenerated current by bemf of the motor will return. theref ore, take measures, such as the insertion of a capacitor between the power supply and gnd as the pass of the regenerated current. determine the capacitance in full consideration of all the characteristics of the electrol ytic capacitor, because the electrolytic ca pacitor may loose some capacitance at low temperatures. if the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage of the power supply line to rise, which t he product and its peripheral circuit may exceed the absolute maximum ratings. it is recommended to implement physical safe ty measures 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) design for heat use the design for heat that allows for a sufficient margin in light of the power dissipation (pd) in actual using conditions. (5) operation in strong magnetic field use caution when using the ic in the strong magnetic field as doing so may cause the ic to malfunction. (6) aso when using the ic, make settings so that the output transisto rs for the motor will not be used under conditions in excess of the absolute maximum ratings and aso. (7) thermal shutdown circuit this ic incorporates thermal shutdown circuit(tsd circuit). when the chip temperature becomes the one shown in below , tsd circuit operates and makes the coil output to motor open. it is designed to shut the ic off from runaway thermal operation. it is not designed to protect the ic or guarantee its operation. do not continue to use the ic after operating this ci rcuit or use the ic in an environment where the operation of this circuit is assumed. tsd on temperature[ ] (typ.) hysteresis temperature [ ] (typ.) 175 20 (8) ground wiring pattern when having both small signal and large current gnd, it is recommended to isolate the two gnd patterns, placing a single ground point at the application's refe rence point so that the pattern wiring resistance and voltage variations caused by large currents do not cause voltage variations of the sm all signal gnd. be careful not to change the gnd wiring pattern of any external parts, either.
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