描述 Description

General description
The SA56202 is a one-chip motor driver IC that is capable to drive all motors of CD or DVD systems: spindle, sled and loading motors and actuators on the optical pick-up unit. The driver intended for the 3-phase, brushless, Hall-commutated spindle motor uses True-Silent PWM. This proprietary technology ensures that all 3-phase motor currents are sinusoidal resulting in an optimally silent driver. Internal regeneration of the back-EMF of the spindle motor enables the driver to operate in current-steering mode without using external power-dissipating sense resistors. The driver intended for the 2-phase sled stepper motor operates in current-steering PWM mode. In addition the IC contains four full-bridge linear channels that can be used to drive a loading motor and 3D actuators (focus, tracking and tilt).True-Silent PWM spindle motor driver
Low heat generation due to power-efficient direct full-bridge switching of spindle motor driver
Controlled spindle motor current during acceleration and brake
Reverse torque brake function (full bridge)
Adjustable spindle motor current limiter
Internal regeneration for EMF of spindle motor
Current-steering PWM controlled stepper motor driver for sled
Four class-AB linear channels for loading motor and 3D actuators (focus, tracking and tilt)
Low on-resistance D-MOSFET output power stages
Built-in thermal shutdown, thermal warning and temperature diode
Interfaces to 3 V and 5 V logic
Package with low thermal resistance to heatsink (reflowable die pad).