AM5858
5-channel BTL Driver for DVD player

Features

1) Two channels are current-type BTL drivers for actuators of tracking and focus. Two channels are voltage-type BTL driver for sled and spindle motors. It is also built-in one channel bi-direction DC motor driver for tray.
2) Wide dynamic range [9.0V (typ.) when Vcc1= Vcc2= 12V, at RL=8O load].
3) Separating power of Vcc1 and Vcc2 is to improve power efficiency by a low supply voltage for tracking, focus, and spindle.
4) Level shift circuit built-in.
5) Thermal shut down circuit built-in.
6) Mute 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 is two power OPAMPS in bridge configuration.
8) Sled motor driver:
A general purpose input OP provides differential input for signal addition. The output structure is one power OPAMP in bridge configuration.
9) Spindle driver:
Single input linear BTL driver. The output structure are two power OPAMPS in bridge configuration.
10) Tray in-out driver:
The DC motor driver supports forward/reverse control for tray motor.

Description

The AM5858 is a five-channel BTL driver IC for driving the motors and actuators such as used in DVD player. 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