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BD7902CFS

Rohm
Part Number BD7902CFS
Manufacturer Rohm
Description 6CH Power Driver for CD-ROM/ DVD-ROM
Published Mar 23, 2005
Detailed Description BD7902CFS Optical disc ICs 6CH Power Driver for CD-ROM, DVD-ROM BD7902CFS BD7902CFS is a 6-channel driver IC that integ...
Datasheet PDF File BD7902CFS PDF File

BD7902CFS
BD7902CFS

Overview
BD7902CFS Optical disc ICs 6CH Power Driver for CD-ROM, DVD-ROM BD7902CFS BD7902CFS is a 6-channel driver IC that integrates all drivers necessary for CD-ROM, and DVD-ROM systems into a single chip.
The built-in 2-channel sled motor driver is used for the stepping motor.
Low heat operation can be achieved by applying the PWM driving system for sled and spindle motor drivers.
!Applications CD-ROM, DVD-ROM !Features 1) 3channel BTL driver, 2channel PWM driver and 3phase motor driver.
- ALL of the motor and actuator for CD-ROM, DVD-ROM etc.
2) These mode is able to be selected by the two control terminals.
- ON/OFF of loading, and other 5channels, brake mode select of spindle driver and standby mode.
3) Built-in triangular-wave generator.
4) Package SSOP-A54 has large power dissipation.
5) Built in thermal-shut-down circuit.
〈 Spindle driver 〉 • Efficient drive by current feedback PWM drive.
• Built in current limit, hall bias, short brake, FG output and reverse protection circuit.
• Low ON-Resistor.
(RON=0.
95Ω) 〈 Sled motor driver 〉 • Efficient drive by current feedback PWM drive.
• Built in 2channel for stepping motor.
〈 Actuator driver, Loading driver 〉 • Linear BTL drive system.
1/17 BD7902CFS Optical disc ICs !Absolute maximum ratings (Ta=25°C) Parameter POWER MOS power suuply voltage Preblock/BTL powerblock power supply voltage PWM control block power supply voltage Power dissipation Operating temperature range Storage temperature Symbol SPVM1,2,SLRNF1,2 VCC,SLVDD,AVM DVCC Pd Topr Tstg Limits 15∗1 15 7 2.
6∗2 −35~+85 −55~+150 Unit V V V W °C °C ∗1 POWER MOS output terminals (9, 11, 18, 34~37pin) is contained.
∗2 PCB (70mm×70mm×1.
6mm glass epoxy) mounting.
Reduced by 20.
8mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta=25°C) (Set the power supply voltage taking allowable dissipation into considering) Parameter POWER MOS Power supply voltage 1 POWER MOS Power supply voltage 2 Preblock Power supply voltage Power block Power su...


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