features BW43023 is a 4 channel driver for optical disc motor driver. dual channel current feedback typ e drivers are built in, in addition to dual channel motor driver. Bseparating vcc into pre-power of sled motor, power of loading motor and power of actu ator, can m ake batter power efficiency, by low supply voltage dri ve. Bstand- b y mode built in. Bthermal shutdow n circuit on ch ip. description the W43023 is a 4-channel btl driver ic for driv ing t he mo t ors a nd actuato rs in products such as cd-rom/dvd-rom/dvd-player drives. two of the channel s use current feedback to minimize the current phase shift caused by the influence of load inductance. applications cd-rom d rives, dvd d rives, dv d-rom drives. block diagram W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 1 of 9 rev 1.0 sep. 13,2005
pin descriptions pin no. pin name function 1 vinfc focus drive input 2 cfcerr1 for connection of capacitor for the error amp filter 3 cfcerr2 for connection of capacitor for the error amp filter 4 vinsl + op-amp input (+) for the sled driver 5 vinsl - op-amp input (-) for the sled driver 6 vosl op-amp output for the sled driver 7 vnffc focus driver feedback pin 8vcc vcc 9 pvcc1 power vcc for sled driver block 10 pgnd ground for sled driver block 11 vosl - sled driver output (-) 12 vosl + sled driv er ou tput (+) 13 vofc - focus dri ver output (-) 14 vofc + focus dri ver output (+) 15 votk + tracking dr iver output (+) 16 votk - tracking driver output (-) 17 vold + loadin g driv er ou tput (+) 18 vold - loadin g driv er ou tput (-) 19 pgnd ground f or actuator driver block 20 vnftk tracking driver feedback pin 21 pvcc2 p ower vcc for actuator dr iver block 22 gnd ground 23 vintk loading driver input 24 ctkerr2 for connection of capacitor for the error amp filter 25 ctkerr1 for connection of capacitor for the error amp filter 26 vintk tracking driver input 27 bias bias input 28 mute mute con trol notes: the indicated polarities for the output pins are for when all inputs are (+). the output h bridge supply p ins are pvcc1 for the loading channel, pvcc2 for the focus, tracking channels, and vcc for the pre-block and sled channel. al ways ensure that vcc
pvcc1,2. pinout W43023 W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 2 of 9 rev 1.0 sep. 13,2005
absolute maximum ratings (ta = 25 o c) parameter symbol limits unit power supply voltage v cc ?pvcc1,2 13.5 v power dissipation p d 1.7 * w operating temperature t opr -35~+85 o c storage temperature t stg -5 5~+150 o c ?reduce by 13.6 mw for each increase in t a of 1 o c over 25 o c. when mounted on a 70mm j 70mm j 1.6 mm glass epoxy board. recommended operating conditions (ta = 25 o c) parameter symbol limits unit vcc 4.5~13.2 v pvcc1 4.5~vcc v power supply voltage pvcc2 4.5~vcc v electrical characteristics ( unless otherwise noted, ta = 25 o c, v cc = pv cc1 =12v, pv cc2 =5v, v bias =2.5v, r l1 = r l2 =8, r l3 = r l4 =15 ) parameter symbol min. typ. max. unit conditions quiescent current i cc -1 82 7 ma stand-by quiescent current i st -- 0.5ma voltage for stand-by on v ston 0- 0. 5v voltage for stand-by o ff v stoff 2.0 - - v output offset current i o1,2 -6 - 6 ma maximum output amplitude v o1 , 2 3.6 4.0 - v v in = v bias d 1.5v trans conductance gm 1.3 1.5 1.7 a/v v in = v bias d 0.2v v icm -0.3 - 11.0 v v bias =6 v common mode input range v icm -0.3 - 4.0 v vcc=pvcc1=5v input bias current i bop -3 0 30 0 na low leve l output voltage v olop -0. 1 0. 3v output source current i so 0.3 0.5 - ma output sink current i si 1-- ma output offset voltage v offsl -100 0 100 mv maximum output voltage v o3 7.5 9.0 - v v in = v bias d 1.5v closed loop voltage gain g vsl 18.0 20.0 22.0 db v in = v bias d 0.2v output offset voltage v offld -50 0 50 mv maximum output voltage v o4-1 7.5 9.0 - v v in = v bias d 1.5v maximum output voltage v o4-2 3.6 4.0 - v v in = v bias d 1.5v vcc=pvcc1=5v closed loop voltage gain g vld 13.5 15.5 17.5 db v in = bias d 0.2v gain error by polarity ?g vld 012 db v in = bias d 0.2v *this product is not designed for protection against radioactive rays. W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 3 of 9 rev 1.0 sep. 13,2005
typical curve W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 4 of 9 rev 1.0 sep. 13,2005
W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 5 of 9 rev 1.0 sep. 13,2005
W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 6 of 9 rev 1.0 sep. 13,2005
test circuit W43023 W43023 W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 7 of 9 rev 1.0 sep. 13,2005
application example W43023 W43023 W43023 wafer win 4-channel btl motor driver for cd-rom * all specs and applications shown above subject to change without prior notice. page 8 of 9 rev 1.0 sep. 13,2005
operation notes (1) therm al-shut-down circuit built in. in case ic chip temperature rise to 175: (typ.), therm al-shut-down circuit operates and output current mu ted. next time ic chip temperature falls below 150: (typ.), the driver blocks start. (2) in case stand-by-pin voltage under 0.5v or opened, qu iescent cu rre nt is mu ted. stand-by- pin voltage should be over 2.0v for normal application. (3) bias-pin (pin 27) should b e pulled up more than 1.2v. in case b ias-pin voltag e is pulled down under 0.9v (typ.), output current is muted. (4) insert the by-pass capacitor between vcc-pin and gnd-pin of ic as possible as near (approxi matelv 0.1?f). (5) heat dissipation fins are attached to the gnd on the inside of the package. make sure to connect these to the external gnd. < suppleme nt > current-feedback driver trans conductance (output current/input voltage) is show as follows. r wire = 0.15 (d 0.05) au wire )/( 1 va rr g wire d m + =
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