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SA56202TW Datasheet

  • SA56202TW

  • One-chip motor driver

  • 24頁

  • PHILIPS

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SA56202
One-chip motor driver
Rev. 01 鈥?19 July 2004
Preliminary data sheet
1. 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).
The SA56202 is available in an exposed die pad HTSSOP56 package.
2. Features
s
True-Silent PWM spindle motor driver
s
Low heat generation due to power-ef鏗乧ient direct full-bridge switching of spindle motor
driver
s
Controlled spindle motor current during acceleration and brake
s
Reverse torque brake function (full bridge)
s
Adjustable spindle motor current limiter
s
Internal regeneration for EMF of spindle motor
s
Current-steering PWM controlled stepper motor driver for sled
s
Four class-AB linear channels for loading motor and 3D actuators (focus, tracking and
tilt)
s
Low on-resistance D-MOSFET output power stages
s
Built-in thermal shutdown, thermal warning and temperature diode
s
Interfaces to 3 V and 5 V logic
s
Package with low thermal resistance to heatsink (re鏗俹wable die pad).
3. Applications
s
s
s
s
DVD+RW, DVD-RW, DVD-ROM and DVD-RAM
Combi
CD-ROM and CD-RW
Other compact disk media.

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