Descripation

The FAN8048 is a monolithic integrated circuit suitable for a 4 channels direct PWM H-bridge driver which incorporates two switch-mode step up-down converter with synchronous rectification provides local microprocessor and servo IC power in portable CD players and portable devices.

Features

H-Bridge PWM Driver

• 4 Channels direct PWM H-bridge drivers

• Digital input and direct PWM output

• Internal power switches

- ON state resistance : 2.0 Ω (typ.), which value added the upper and the lower switches

Synchronous DC-DC Converter

• Built-in step up converter (VG converter)

• Built-in two synchronous step up-down converter

• Built-in short circuit protection

• Internal Switches

- Power Switch : 0.4Ω (typ.) at 500mA

-. Synchronous-Rectifier Switch : 0.4Ω (typ.) at 500mA

Others

• Built-in power-on reset circuit

• Built-in battery charge circuit

• Built-in voltage regulator control circuit

• Built-in thermal shutdown (TSD) circuit

• Buit-in channel mute circuit

Typical application

• Portable CD-MP3 player