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BD6669FV motor driver ics 1/16 3phase spindle motor driver for cd-rom BD6669FV BD6669FV is a 3-phase spindle motor driver adopting 180 pwm direct driving system. noise occurred from the motor driver when the disc is driven can be reduced. low power consumption and low heat operation are achieved by using dmos fet and driving directly. ! ! ! ! applications cd-rom ! ! ! ! features 1) direct-pwm-linear driving system. 2) built in power save circuit. 3) built in current limit circuit. 4) built in fg-output. 5) built in hall bias circuit. 6) built in reverse protection circuit. 7) built in short brake circuit. 8) low consumption by mos-fet. 9) built in capacitor for oscillator. 10) built in rotation detect. ! ! ! ! absolute maximum ratings (ta=25 c) parameter symbol limits unit power supply voltage v cc tj max 7v v supply voltage for motor v m 7 20 v vg pin voltage v g i omax topr 1000 mw c c operating temperature range 150 c junction temperature power dissipation output current storage temperature range pd tstg 1020 ? 20~ + 75 ? 55~ + 150 ma reduce power by 8.16mw for each degree above 25 c. ? 2 70mm 70mm 1.6mm glass epoxy board. ? 1 however, do not exceed pd, aso and tj=150 c. ? 1 ? 2 ! ! ! ! recommended operating conditions parameter supply voltage for motor vg pin voltage this product described in this specification isn't judged whether it applies to cocom regulations. please confirm in case of export. this product is not disigned for protection against radioactive rays. power supply voltage v cc 4.5 5.5 ? v m 3 6.5 v v v ? v g 7.5 14 ? symbol min. typ. max. unit
BD6669FV motor driver ics 2/16 ! ! ! ! block diagram driver matrix u-pre driver l-pre driver a31 1 28 27 26 25 24 23 22 21 20 19 18 17 16 15 2 3 4 5 6 7 8 9 10 11 12 13 14 a21 a32 a22 a11 a12 h1 + h1 ? h2 + h2 ? h3 + h3 ? v m 1 v h + ? + ? + ? + ? + ? matrix torque amp + ? + ? + ? + ? + ? + ? r nf 1 fg ps ec ecr v m 2 sb c nf v pump cp2 cp1 gnd v cc r nf 2 hall bias charge pump exor osc pwm comp reverse detect fig.1 hall comp hall amp tsd ps cl dq ck current sense amp
BD6669FV motor driver ics 3/16 ! ! ! ! pin descriptions pin no. function hall input amp 2 positive input pin name h 2 + 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 short brake pin sb hall input amp 3 negative input h 3 ? hall input amp 2 negative input h 2 ? hall input amp 3 positive input h 3 + hall input amp 1 negative input output3 for motor resistor connection pin for current sense power supply for signal division power supply for driver torque control standard voltage input terminal capacitor connection pin for phase compensation gnd hall bias pin hall input amp 1 positive input output3 for motor power supply fo driver output1 for motor output1 for motor output2 for motor output2 for motor capacitor pin 1 for charge pump torque control voltage input terminal h 1 ? capacitor pin 2 for charge pump cp2 capacitor connection pin for charge pump v pump r nf2 v cc v m2 fg output pin fg ecr ec cp1 power save pin resistor connection pin for current sense ps r nf1 cnf gnd v h h 1 + a 12 a 11 a 21 a 32 a 22 v m1 a 31
BD6669FV motor driver ics 4/16 ! ! ! ! input output circuits output pins a 1 : pin1, 2, a 2 : pin3, 4, a 3 : pin5, 6 hall bias pin8 cnf pin19 torque amplifier ecr : pin24, ec : pin25 short brake pin20 fg output fg : pin26 rnf2 pin21 power save pin27 cp1 output pin16 cp2 / v pump output cp2 : pin17, v pump : pin18 hall input h1 + : pin9, h1 ? : pin10, h2 + : pin11, h2 ? : pin12, h3 + : pin13, h3 ? : pin14 a 1 a 2 a 3 v m r nf 1 v cc hn + 1k 5k 1k 1k 1k v cc hn v cc v h (pin8) 100k cp1 (pin16) v cc 50 v cc fg (pin26) v cc 50 v cc v m v pump (pin18) cp2 (pin17) 2k 2k cnf (pin19) v cc 50 20k sb (pin20) v cc 30k 20k ps (pin27) v cc 30k 355 rnf2 (pin21) v cc 1k ecr (pin24) ec (pin25) v cc 1k
BD6669FV motor driver ics 5/16 ! ! ! ! electrical characteristics (unless otherwise noted, ta=25 c, v cc =5v, v m =5v) parameter conditions circuit current 1 circuit current 2 on voltage range off voltage range hall bias voltage input bias current minimum input level input voltage range offset voltage ( + ) hall hysteresis level (+) hall hysteresis level ( ? ) in-phase input voltage range fig.2 fig.2 fig.2 fig.2 fig.2 fig.4 fig.4 fig.4 fig.8 fig.8 fig.6 fig.6 fig.6 fig.6 fig.7 fig.7 fig.6 fig.5 fig.3 fig.6 fig.9 test circuit i hb = 10ma e c = e cr = 1.65v sutand by mode sutand by mode hall input amp short brake linear range 0.5v 3.3v offset voltage ( ? ) input current input / output gain output on-resistance torque limit voltage charge pump output voltage i fg =+ 100 a v cc = v m = 5v on voltage range off voltage range i o = 600ma (upper + lower) low voltage fig.6 high voltage i fg =? 100 a symbol i cc 1 i cc 2 v pson v psoff v hb i ha v har v inh v hys + v hys ? e c , e cr ecofs + ecofs ? g ec e cin r on v tl v fgl v fgh vpump v sbon v sboff max. 1.4 ? 3.6 5 17 5 40 100 ? 1.0 ? ? 5 ? 1.2 14 0.24 0.7 0.4 ? 1.0 ? min. ? ? 0.6 1.4 5 2.5 ? 8.0 100 5 0 5 ? 100 ? 12 0.8 ? 0.3 0.16 6 2.5 ? 4.6 typ. 1.0 ? 2.0 ? 5 ? 40 ? 20 ? 11 ? ? ? 20 ? ? 50 ? 50 ? 2.5 1.0 0.5 0.2 ? 10 ? ? ? unit a v v v v a ma mv pp mv mv mv v mv a a/v ? v v v v v v ! ! ! ! measuring circuit 1. value of resistor (fig.2 fig.9) 5, 6pin r l a 1 r l =5 ? , r nf =0.33 ? a 2 a 3 gnd r nf 3, 4pin 1, 2pin 13, 16pin
BD6669FV motor driver ics 6/16 2. input-output table pin no. condition1 condition2 condition3 condition4 condition5 condition6 l h m m h l m m m m m m m m m m m m m m m m m m h l l h m m m m h l l h h l l h l h l h h l l h l h l h h l l h h l h l h l l h h l 23 24 28 26 25 input condition output condition e c < e cr e c > e cr 27 17.18 14.15 11.12 17.18 14.15 11.12 h 1 + h 1 ? h 3 ? h 2 ? h 2 + h 3 + a 1 a 2 a 3 a 1 a 2 a 3 h l h l l h h : upper tr on l : lower tr on output logic h=2.8v m=2.5v l=2.2v input voltage 3. measuring circuit fig.2 h1 v ps 5v 1.65v r nf 0.01 f 10k ? 5v r l h2 h3 h1 h2 h3 r l r l i hb r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v hb : value of v 1 v ps =5 [v] i hb =10 [ma] v pson : range of vps output pins become input-output table. v psoff : range of vps output pins become open. i cc 1 : value of a 1 v ps =0 [v] hall input condition : condition1 i cc 2 : value of a 1 v ps =5 [v] hall input condition : condition1 10 v a
BD6669FV motor driver ics 7/16 fig.3 h1 + 1.65v 5v r l h2 + h3 + h1 ? h2 ? h3 ? r l r l v rnf2 r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v ps =5 [v] v tl : range of v rnf2 that v m current (i m ) become 0a. 5v 5v a 1 fig.4 h1 + 1.65v r nf 0.01 f 10k ? 5v r l h2 + h3 + h1 ? h2 ? h3 ? r l r l r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v har : hall voltage range that output pins become input-output table. v inh : hall input level that output pins become input-output table. i ha : value of 'a1' (hn + =2.5v, hn ? =2.0v) value of 'a2' (hn + =2.0v, hn ? =2.5v) n=1, 2, 3 5v 5v 10v hn ? =2.5 v v inh : hn + ? hn ? a 1 a 1 a 2 a 1 a 2 a 2
BD6669FV motor driver ics 8/16 fig.5 h1 + 1.65v 5v 600ma h2 + h3 + h1 ? h2 ? h3 ? r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? ron=(v oh + v ol ) / 0.6 v oh : in case output measurement pin='h' by input condition and i o = ? 600ma, value of 'v oh ' v ol : in case output measurement pin='l' by input condition and i o =600ma, value of 'v ol ' 5v 5v a 1 5, 6pin a 2 3, 4pin a 3 1, 2pin a 1 5, 6pin a 2 3, 4pin a 3 1, 2pin r nf1 v ol 600ma v m v oh fig.6 v ecr r nf 0.01 f 10k ? 5v r l h2 h3 h1 h1 h2 h3 r l r l r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? g ec = { (v 1 ? v 2 ) / (1.5 ? 1.2) } / 0.5 when e cr =1.65v value of v 1 (e c =1.2v) value of v 2 (e c =1.5v) e c , e cr : torque control operating range. e cofs : e c voltage range that v m current (i m ) is 0a. e cin : value of 'a2' (e c =e cr =1.65v) value of 'a3' (e c =e cr =1.65v) v fgh : value of v 1 (i fg = ? 100 a) hall input condition 3. v fgl : value of v 1 (i fg = + 100 a) hall input condition 4. 5v 5v 10v ifg a 3 v ec a 2 a 1 a 1
BD6669FV motor driver ics 9/16 fig.7 h1 + 1.65v r nf v sb 0.01 f 10k ? 5v r l h2 + h3 + h1 ? h2 ? h3 ? r l r l r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v sbon : volatge range of 'v sb ' that output pins become 'l'. v sboff : range of 'v sb ' that output pins become input-output table. 5v 5v 10v fig.8 h1 + 1.65v r nf 0.01 f 10k ? 5v r l h2 + h3 + h1 ? h2 ? h3 ? r l r l r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v hys : voltage difference h3 + to h3 ? that fg voltage change v1. 5v 5v 10v v 1
BD6669FV motor driver ics 10/16 fig.9 h1 + 1.65v r nf 0.01 f 10k ? 5v r l h2 + h3 + h1 ? h2 ? h3 ? r l r l r nf1 ps fg ec ecr v m v cc r nf2 sb c nf v pum cp2 cp gn a3 a3 a2 a2 a1 a1 v m v h h1 + h1 ? h2 + h2 ? h3 + h3 ? v pump : value of v1. 5v 5v 0.1 f 0.1 f v 1
BD6669FV motor driver ics 11/16 ! ! ! ! circuit operation 1. application (1) hall input hall element can be used with both series and parallel connection. determining r1 and r2, make sure to leave an adequate margin for temperature and dispertion in order to satisfy in-phase input voltage range and minimum input level. a motor doesn?t reach the regular number of rotation, if hall input level decrease under high temperature. v cc r1 r2 r1 v h r2 v h fig.10 parallel connection h2 h3 h1 v cc series connection h2 h1 h3 2.torque voltage by the voltage difference between ec and ecr, the current driving motor changes as shown in fig.11 below. i tl i m [a] 0 ecr ec [v] fig.11 forward torque reverse torque the gain of the current driving motor for the voltage of ec can be changed by the resistance of rnf.
BD6669FV motor driver ics 12/16 (3) current limit the maximum value of the current driving motor can be changed by the resistance of rnf. i tll =0.2 / rnf (a) (4) short brake the short brake is switched by sb pin and its operation is shown in table below. sb ec < ecr h l short brake rotating forward ec > ecr short brake reverse brake output upper (3phase) fet turn off and lower (3phase) fet turn on in short brake mode, as shown fig.12. fig.12 off on off on motor off on rnf v m (5) reverse detection reverse detection is constructed as shown in fig.13. output is opened when ec>ecr and the motor is rotating reverse. fig.13 h2 + ec out ecr h2 ? h3 + h3 ? + ? + ? + ? dq ck
BD6669FV motor driver ics 13/16 motor rotation at reverse detection reverse detection is triggered and set outputs to open, when motor rotates in the reverse direction. deceleration (reverse torque) when ec > ecr forward rotation (forward torque) when ec < ecr stop motor idles in the reverse direction by inertia.
BD6669FV motor driver ics 14/16 (6) timing chart h1 + h2 + h3 + 30 a1 output current a1 output voltage a2 output current a2 output voltage a3 output current a3 output voltage fig.14
BD6669FV motor driver ics 15/16 ! ! ! ! application example driver matrix u-pre driver l-pre driver a31 a21 a32 a22 a11 a12 h1 + h1 ? h2 + h2 ? h3 + h3 ? v m 1 v h + ? + ? + ? + ? + ? matrix torque amp + ? + ? + ? + ? + ? + ? r nf 1 fg ps ec ecr v m 2 sb c nf v pump cp2 cp1 gnd v cc r nf 2 hall bias charge pump exor osc pwm comp reverse detect hall comp hall amp tsd ps cl dq ck current sense amp 100 ? 100 ? 0.33 v cc servo signal 10 f 0.1 f 0.1 f 100pf 10k ? 1.65v fig.15 1 f h3 h2 h1 v cc ! ! ! ! operation notes 1. absolute maximum ratings absolute maximum ratings are those values which, if exceeded, may cause the life of a device to become significantly shorted. moreover, the exact failure mode cannot be defined, such as a short or an open. physical countermeasures, such as a fuse, need to be considered when using a device beyond its maximum ratings. 2. gnd potential the gnd terminal should be the location of the lowest voltage on the chip. all other terminals should never go under this gnd level, even in transition.
BD6669FV motor driver ics 16/16 3. thermal design the thermal design should allow enough margin for actual power dissipation. 4. mounting failures mounting failures, such as misdirection or mismounts, may destroy the device. 5. electromagnetic fields a strong electromagnetic field may cause malfunctions. 6. coil current flowing into v m a coil current-flows from motor into v m when torque control input changes from ececr, and v m voltage rises if v m voltage source doesn?t have an ability of current drain. make sure that surrounding circuits work correctly and aren?t destroyed, when v m voltage rises. physical countermeasures, such as a diode for voltage clamp, need to be considered under these conditions. 7. cnf pin an appropriate capacitor (100pf (typ.)) at cnf pin make motor current smooth. make sure the motor current doesn?t oscillate, even in transition. ! ! ! ! electrical characteristics curve fig.16 power dissipation curve ? 70mm 70mm 1.6mm glass epoxy board. ? reduce power by 8.16mw for each degree above 25 c. 050 25 75 100 125 150 0.50 1.02 0 ta ( c) pd (w) ! ! ! ! external dimensions (units : mm) ssop-b28 0.15 0.1 0.1 1.15 0.1 1 0.65 7.6 0.3 5.6 0.2 28 10.0 0.2 0.3min. 14 15 0.22 0.1 0.1

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