BD6670FM motor driver ics 1/17 3phase spindle motor driver for cd-rw BD6670FM BD6670FM is a 3-phase spindle motor driver adopting 180 pwm direct driving system. noise occurred from the motor driver when the disc is driver can be reduced. low power consumption and low heat operation are achieved by using dmos fet in output and driving directly. ! ! ! ! applications cd-rw ! ! ! ! features 1) 180 degree direct-pwm driving system. 2) built in power save circuit. 3) built in current limit circuit. 4) built in fg-output. 5) built in 3phase synthesized fg-output. 6) built in hall bias circuit. 7) built in reverse protection circuit. 8) built in short brake circuit. 9) low consumption by mos-fet. 10) built in capacitor for oscillator. 11) built in gain switch and current limit switch. ! ! ! ! absolute maximum ratings (ta=25 c) power supply voltage supply voltage for motor v g pin voltage operating temperature range junction temperature power dissipation output current storage temperature range debating in done at 17.6mw / c for operating above ta=25 c. the current is guaranteed 3.0a in case of the current is turn on / off in a duty-ratio of less than 1/10 with a maximum on-time of 5msec. ? 2 70mm 70mm 1.6mm glass epoxy board. ? 1 however, do not exceed pd, aso and tj=150 c. parameter symbol limits unit v cc t jmax 7v v v m 15 20 v v g i omax topr 2500 mw c c 150 c pd tstg 2200 ? 20~ + 75 ? 55~ + 150 ma ? 1 ? 2 ! ! ! ! recommended operating conditions supply voltage for motor v g pin voltage power supply voltage parameter v cc 4.5 5.5 ? v m 4.0 13.2 v v v ? v g 8.5 19 ? symbol min. typ. max. unit
BD6670FM motor driver ics 2/17 ! ! ! ! block diagram + ? torque amp current sense reverse detect + ? driver matrix ps cl h1 + h2 + h1 ? h2 ? h3 + h3 ? cp1 cp2 v g c nf sb v cc gsw gnd fg3 v h fg v m v m a1 r nf 1 r nf 1 a3 r nf 2 ps ec ecr a 2 gain control charge pump hall bias matrix fig.1 dq ck qb + ? + ? + ? + ? + ? + ? + ? + ? + ? exor pwm comp hall comp 1 2 3 4 5 6 7 8 9 10 11 12 13 14 19 18 17 16 15 26 25 28 27 21 20 24 23 22 hall amp tsd osc u-pre driver l-pre driver
BD6670FM motor driver ics 3/17 ! ! ! ! pin descriptions capacitor connection pin for charge pump output 3 for motor power supply for signal division capacitor connection pin for phase compensation short brake pin capacitor pin 2 for charge pump hall input amp 1 positive input resistor connection pin for current sense output 2 for motor resistor connection pin for current sense output 1 for motor resistor connection pin for current sense power supply for driver gnd capacitor pin 1 for charge pump hall input amp 1 negative input gain switch pin hall input amp 3 negative input hall input amp 3 positive input hall input amp 2 positive input hall input amp 2 negative input torque control standard voltage input terminal power supply for driver torque control voltage input terminal power save pin hall bias pin fg output pin fg3 output pin h 2 + sb h 3 ? h 2 ? h 3 + h 1 ? cp2 v g r nf2 r nf1 r nf1 v cc a 3 a 2 a 1 v m v m fg fg3 ecr ec cp1 ps cnf v h h 1 + pin no. function pin name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 gnd gsw
BD6670FM motor driver ics 4/17 ! ! ! ! input output circuits output pins a 1 : pin24, a 2 : pin22, a 3 : pin20 hall bias pin26 cnf pin12 torque amplifier ecr : pin16, ec : pin17 short brake pin13 fg / fg3 output fg : pin27, fg3 : pin28 rnf2 pin19 power save pin18 cp1 output pin9 cp2 / v g output cp2 : pin10, v g : pin11 hall input h1 + : pin1, h1 ? : pin2, h2 + : pin3, h2 ? : pin4, h3 + : pin5, h3 ? : pin6 gain switch pin7 a 2 a 1 v m r nf 1 a 3 v cc v h (pin26) 100k cp1 (pin9) v cc 50 v cc v m v g (pin11) cp2 (pin10) 2k 2k cnf (pin12) v cc 50 20k sb (pin13) v cc 30k 20k ps (pin18) v cc 30k fg3 (pin28) fg (pin27) v cc 50 v cc 355 rnf2 (pin19) v cc 1k ecr (pin16) ec (pin17) v cc 1k v cc hn + 1k 5k 1k 1k 1k v cc hn ? v cc v cc gain switch (pin7) 1k 75k 100k 10k 10k 25k
BD6670FM motor driver ics 5/17 ! ! ! ! electrical characteristics (unless otherwise noted, ta=25 c, v cc =5v, v m =12v) parameter conditions fig.2 fig.2 fig.2 fig.2 fig.2 fig.3 fig.3 fig.3 fig.3 fig.4 fig.4 fig.4 fig.6 fig.6 fig.6 fig.6 fig.7 fig.7 fig.7 fig.4 fig.4 fig.5 fig.5 fig.10 fig.10 fig.11 fig.11 fig.9 fig.4 test circuit i hb = 10ma e c = e cr = 1.65v gsl = l , r nf = 0.5 ? gsl = m , r nf = 0.5 ? gsl = h , r nf = 0.5 ? gsw = l , r nf = 0.5 ? gsw = m , r nf = 0.5 ? gsw = h , r nf = 0.5 ? stand by mode stand by mode oneside input level linear range : 0.5v 3.0v i fg =? 100 a v cc = 5v, v m = 12v, cp1 = cp2 = 0.1 f i o = 600ma (upper + lower) fig.8 symbol i cc 1 i cc 2 v pson v psoff v hb v har v inh v hys + v gswl v gswh v gswop v hys ? e c , e cr ecofs + ecofs ? r on g ecl e cin i tll i tlm i tlh v fgl v fgh v pump g ecm g ech max. 1.3 3.6 10 17 5 40 100 ? 1.0 ? 5 0 1.35 19 920 460 ? 0.84 1.68 0.42 1380 min. ? ? 0.7 1.4 7 ? ? 2.0 2.5 80 5 0 5 ? 100 ? 11 ? 4.6 340 680 12.5 0.56 0.28 0.35 1.12 1020 typ. 1.0 ? 5 ? 40 ? 20 1 12 ? ? ? 20 ? ? 1.3 ? 0.6 ? ? ? 50 ? 50 ? 2.5 1.0 400 800 ? 17 0.70 1.40 1200 unit a v v v v v v v ma mv pp mv mv mv v mv a ? ma ma v i fg =+ 100 a i cp1 =? 4ma i cp1 =+ 4ma i cp2 =? 4ma i cp2 =+ 4ma 0.4 ? ? v v cp1l v cp1h 0.65 0.25 0.45 v 0.6 0.2 0.4 v v cp2l v cp2h 0.8 0.4 0.6 v 0.55 0.15 0.35 v v a/v a/v a/v ma circuit current 1 circuit current 2 on voltage range off voltage range hall bias voltage minimum input level low voltage range high voltage range open voltage range input voltage range offset voltage ( + ) hall hysteresis level (+) hall hysteresis level ( ? ) in-phase input voltage range offset voltage ( ? ) input current output on-resistance torque limit current l torque limit current m torque limit current h charge pump output voltage input / output gain m input / output gain h input / output gain l |