View AT5654_473945.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AT5654
4-Channel BTL Motor Driver for CD-ROM Features
AT5654 is a 4 channel driver for optical 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. Compatible with BA5954
Description
The AT5654 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
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 1
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
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 STBY 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 Stand-By control
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
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 2
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
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* -30~+80 -55~+150 unit V W o C o C
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 4.0~13.2 4.0~Vcc 4.0~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 2.0V 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. 10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 3 Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM Typical Curve
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 4
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 5
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 6
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
Test Circuit
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 7
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM Application example
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 8
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 9
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
Power Dissipation (Ta = 25oC)
Condition: mount on 50x50 mm2 t=1.0mm paper phenol PCB
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 10
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
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
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 11
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26
AT5654
4-Channel BTL Motor Driver for CD-ROM
Reflow Condition (IR/Convection or VPR Reflow)
Reference JEDEC Standard J-STD-020A
Classification Reflow Profiles Convection or IR/Convction
Average Heating Rate(180C to peak) Preheat Temperature(12520C) Temperature maintained above 180C Time within 5C of actual Peak Temperature Peak Temperature Range(Note 1) Cooling Rate Time 25C to Peak Temperature 5C/second max. 120 seconds max. 10~150 seconds 10~20 seconds 219~225C or 235~240C 6C /second max. 6 minutes max.
VPR
10C/second max.
60 seconds 219~225C or 235~240C 10C/second max.
*1 The maximum peak temperatures for IR and VP reflow are depending on package dimensions.
Package Reflow Conditions Pkg. Thickness 2.5mm Pkg. Thickness <2.5mm Pkg. Thickness <2.5mm and and and all bags Pkg. Volume 350 mm3 Pkg. Volume <350 mm3
Convection 219~225C VPR 219~225C IR/Convection 219~225C Convection 235~240C VPR 235~240C IR/Convection 235~240C
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C. Tel: 886-3-575-3058 Fax: 886-3-575-3015 12
Email: service@aimtron.com.tw http://www.aimtron.com.tw 01/12/26

▲Up To Search▲

Price & Availability of AT5654

	To Download AT5654 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .