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4-Channel BTL Motor Driver for CD-ROM Features
CMD5954 is a 4 channel driver for cptical disc motor driver. Dual channel current feedback type drivers are built in, in addition to dual channel motor driver. Separating Vcc into Pre-power of sled motor, Power of loading motor and Power of actuator, can make batter power efficiency, by low supply voltage drive. Stand-by mode built in. Thermal shutdown circuit on chip.
CMD5954
Description
The CMD5954 is a 4-channel BTL driver IC for driving the motors and actuators in products such as CD-ROM/DVD-ROM/DVD-Player drives. Two of the channels use current feedback to minimize the current phase shift caused by the influence of load inductance.
Applications
CD-ROM drives, DVD drives, DVD-ROM drives.
Block Diagram
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 1 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM Pin Descriptions
Pin No. 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 Pin name VINFC CFCerr1 CFCerr2 VINSL + VINSL VOSL VNFFC Vcc PVcc1 PGND VOSL VOSL + VOFC VOFC + VOTK + VOTK VOLD + VOLD PGND VNFTK PVcc2 GND VINTK CTKerr2 CTKerr1 VINTK BIAS MUTE Function Focus drive input For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Op-amp input (+) for the sled driver Op-amp input (-) for the sled driver Op-amp output for the sled driver Focus driver feedback pin Vcc Power Vcc for sled driver block Ground for Sled driver block sled driver output (-) sled driver output (+) Focus driver output (-) Focus driver output (+) Tracking driver output (+) Tracking driver output (-) Loading driver output (+) Loading driver output (-) Ground for Actuator driver block Tracking driver feedback pin Power Vcc for Actuator driver block Ground Loading driver input For connection of capacitor for the error amp filter For connection of capacitor for the error amp filter Tracking driver input Bias input Mute control
CMD5954
Notes: The indicated polarities for the output pins are for when all inputs are (+). The output H bridge supply pins are PVcc1 for the loading channel, PVcc2 for the focus, tracking channels, and Vcc for the pre-block and sled channel. Always ensure that VccPVcc1,2.
PinOut
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 2 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM Absolute maximum ratings (Ta = 25oC)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCCPVcc1,2 Pd Topr Tstg Limits 13.5 1.7* -35~+85 -55~+150 unit V W o C o C
CMD5954
Reduce by 13.6 mW for each increase in Ta of 1oC over 25oC. When mounted on a 70mm x 70mm x 1.6 mm glass epoxy board.
Recommended operating conditions (Ta = 25oC)
Parameter Power supply voltage Symbol Vcc PVcc1 PVcc2 Limits 4.5~13.2 4.5~Vcc 4.5~Vcc unit V V V
Electrical characteristics (unless otherwise noted, Ta = 25oC, VCC = PVCC1 =12V, PVCC2 =5V, VBIAS=2.5V, RL1= RL2=8, RL3= RL4=15)
Parameter Symbol Min. Quiescent current ICC Stand-by quiescent current IST Voltage for Stand-by ON VSTON 0 Voltage for Stand-by OFF VSTOFF 2.0 Output offset current IO1,2 -6 Maximum output amplitude VO1,2 3.6 Trans conductance Gm 1.3 Common mode input range VICM -0.3 VICM -0.3 Input bias current IBOP Low level output voltage VOLOP Output source current ISO 0.3 Output sink current ISI 1 Output offset voltage VOFFSL -100 Maximum output voltage VO3 7.5 Closed loop voltage gain GVSL 18.0 Output offset voltage VOFFLD -50 Maximum output voltage VO4-1 7.5 Maximum output voltage VO4-2 3.6 Closed loop voltage gain Gain error by polarity GVLD GVLD 13.5 0 Typ. 18 4.0 1.5 30 0.1 0.5 0 9.0 20.0 0 9.0 4.0 15.5 1 Max. 27 0.5 0.5 6 1.7 11.0 4.0 300 0.3 100 22.0 50 17.5 2 Unit mA mA V V Conditions
mA V VIN = VBIAS 1.5V A/V VIN = VBIAS 0.2V V V nA V mA mA mV V dB mV V V dB dB VBIAS =6 V Vcc=PVcc1=5V
VIN = VBIAS 1.5V VIN = VBIAS 0.2V
VIN = VBIAS 1.5V VIN = VBIAS 1.5V Vcc=PVcc1=5V VIN = BIAS 0.2V VIN = BIAS 0.2V
*This product is not designed for protection against radioactive rays.
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 3 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM Typical Curve
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 4 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 5 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 6 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM
CMD5954
Test Circuit
CMD5954
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 7 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM Application example
CMD5954
CMD5954
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 8 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052
4-Channel BTL Motor Driver for CD-ROM
CMD5954
Operation notes
(1) Thermal-shut-down circuit built in. In case IC chip temperature rise to 175 (typ.), thermal-shut-down circuit operates and output current muted. 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, quiescent current is muted. stand-bypin voltage should be over 2.0V for normal application. (3) Bias-pin (pin 27) should be pulled up more than 1.2V. In case bias-pin voltage 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 (approximatelv 0.1F). (5) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the external GND. < Supplement > Current-feedback driver Trans conductance (output current/input voltage) is show as follows.
gm = 1 ( A/V ) Rd + RWIRE
RWIRE = 0.15 ( 0.05)
Au wire
Package Outlines (units:mm): HSOP-28
CMD5954
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 9 of 9 Rev 1.1 Aug. 5,2002 Fax:886-3-3521052

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