1/4 rev. b structure silicon monolithic integrated circuit products series 4ch pwm sensorle ss system motor driver for md type BD6641KUT 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 pwm soft switchi ng 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 absolute maximum ratings (ta=25c) 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 **1375 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 11mw/c over ta=25c, wh en mounted on a glass epoxy board (70mm ? 70 mm ? 1.6mm). operating conditions (ta=-25 +75 ) parameter symbol min. typ. max. unit power supply voltage vcc 2.1 2.2 6.5 v vm 3.0 v vg 3 6.5 13 v 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. b electrical characteristics (unless otherwise spec ified, ta=25c, vcc=2.2v, vm=1.0v, fin=176khz) parameter symbol limit unit conditions min. typ. max. spindle (3-phase full-wa ve sensorless driver) position detection comparator offset vsofs -10 - 10 mv position detection comparator input range vsd 0 - vcc-1.0 v position detection comparatorinput current h ish - - 2 a input=vcc position detection comparatorinput current l isl -2 - - a input=0v slope charge current islo -12.8 -9.8 -6.8 a slope discharge current isli 6.5 9.4 12.5 a slope clamp h level vslh 0.5 0.8 1.1 v slope clamp l level vsll 0.3 0.46 0.6 v osc oscillating frequency fosc 70 100 130 khz osc=200pf iset=50k ? osc charge current iosco -12.5 -9.65 -6.5 a osc discharge current iosci 6.5 9.56 12.5 a osc h level vosch 0.5 0.75 1.0 v osc l level voscl 0.35 0.53 0.70 v iset voltage vset 350 505 650 mv iset=50k ? pwm input frequency pwm 60 132 200 khz pwm h level input voltage vpwh vcc-0.4 - vcc v pwm l level input voltage vpwl 0 - 0.4 v pwm h level input current ipwh - - 1 a pwm=vcc pwm l level input current ipwl -1 - - a pwm=0v blake h level input voltage vbkh vcc-0.4 - vcc v brake on(BD6641KUT) brake off(bd6643kn) blake l level input voltage vbkl 0 - 0.4 v brake off(BD6641KUT) brake on(bd6643kn) blake h level input current ibkh - - 1 a brake=vcc blake l level input current ibkl -1 - - a brake=0v fg h level output voltage vfgh vcc-0.4 - vcc v io=-500 a fg l level output voltage vfgl 0 - 0.4 v io=500 a sled, focus, tracking (stepping, h-bridge ? 2ch) h level input voltage vinh vcc-0.4 - vcc v l level input voltage vinl 0 - 0.4 v h level input current iinh - - 1 a vin=vcc l level input current iinl -1 - - a vin=0v i/o propagation delay time (h-bridge) trise - 0.2 1 s tfall - 0.1 0.7 s short pulse input response (h-bridge) tm in 120 - - ns input pulse width 200 ns sled, position detection comparator position detection comparator offset vaofs -10 - 10 mv position detection comparator input range vad 0 - vcc-1.0 v position detection comparator input current h iah - - 2 a position detection comparator input current l ial -2 - - a position detection comparator output voltage l vaol - 0.2 0.3 v io=300 a position detection comparator output pull-up resistance roa 10 20 30 k ? this product is not designed for pr otection against radioactive rays.
3/4 rev. b package outlines block diagram no. pin name no. pin name 1 s2 33 brk 2 s3 34 spcom 3 vg 35 slope 4 n.c 36 n.c 5 h2vm 37 spvm 6 n.c 38 msk 7 c2m 39 iset 8 c2p 40 vcc 9 gnd 41 n.c 10 c1m 42 osc 11 n.c 43 n.c 12 h1vm 44 slvm 13 n.c 45 fg 14 c1p 46 flt1 15 bemfu 47 flt2 16 bemfv 48 rlv2 17 bemfw 49 sgnd 18 in1f 50 rlv1 19 in1r 51 slcom 20 h1fout 52 sluout 21 h1pg 53 slpg 22 h1rout 54 slvout 23 n.c 55 n.c 24 n.c 56 slwout 25 spuout 57 n.c 26 n.c 58 n.c 27 spvout 59 h2fout 28 sppg 60 h2pg 29 spwout 61 h2rout 30 n.c 62 in2f 31 pwm 63 in2r 32 stby 64 s1 spwout (29) rlv2 (48) pw m switching predriver commutation logic & start-up logic slope osc. triangle wave generator spindle bemf detector pwm (31) fg (45) vg charge pump h2 predriver h1 predriver vg vg sled decoder sled predriver vg 3 in1f (18) slope (35) t. s . d sppg (28) spvout (27) spuout (25) spvm (37) spcom (34) stby (32) slpg (53) slvout (54) sluout (52) s1 (64) s2 (1) s3 (2) in1r (19) h1vm (12) h1fout (20) h1pg (21) in2f (62) in2r (63) h2fout (59) h2pg (60) vg (3) c1p (14) c1m (10) c2p (8) c2m (7) msk (38) vcc (40) slvm (44) gnd (9) h2vm (5) h2rout (61) h1rout (22) selector flt1 (46) osc (42) iset (39) sled bemf detector slcom (51) 3 4 bemfu (15) bemfv (16) bemfw (17) detect level - + vm flt2 (47) rlv1 (50) slwout (56) vg brk (33) mask set sgnd (49) n.c. (4,6,11,13,23, 24,26,30,36,41, 43,55,57,58 ) pin no./pin name tqfp64u outlines (unit mm) BD6641KUT lot no. type
4/4 rev. b 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 specified 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 electrolytic capacitor, because t he electrolytic capacitor may loose some capacitance at low temperatures. (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 circuit 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 reference 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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