AM5954
4-channel BTL Driver for CD-ROM Driver

Features

1) Two channels are current-type BTL drivers for actuators for tracking and focus, two channels are voltage-type BTL driver for sled and loading motors.
2) Wide dynamic range [9.0V(typ) when Vcc=PVcc=12V, at RL=8O load].
3) Separating power of Vcc and PVcc to improve power efficiency by a low supply voltage for tracking and focus.
4) Level shift circuit built-in.
5) Thermal shut down circuit built-in.
6) Standby mode built-in.
7) Dual actuator drivers:
The drivers use current feedback to minimize the current phase shift caused by the influence of the load inductance. The output structure are two power OPAMPS in bridge configuration.
8) Sled motor driver:
A general purpose input OP provides differential input for signal addition. The output structure are two power OPAMPS in bridge configuration.
9) Loading driver:
Single input linear BTL driver. The output structure are two power OPAMPS in bridge configuration.

Description

The AM5954 is a four-channel BTL driver IC for driving the motors and actuators such as used in CD-ROM drives. Two of the channels use current feedback to minimize the current phase shift caused by the influence of loading inductance.

Typical Application

Functional Block Diagram