[ROHM]

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.

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.