FAB1200: Class-G Headphone Amplifier with Integrated Buck Converter

The FAB1200 is a stereo class-G headphone amplifier. A charge pump generates a negative supply voltage that allows its output to be ground centered. An integrated buck regulator adjusts the voltage supplies between two different levels based on the output signal level to reduce power consumption.

Features

• Class-G Headphone Amplifier Uses Multiple Rails for High Efficiency
• Integrated Inductive Buck Converter for Direct Battery Connection
• Differential Analog Inputs
• Capable of Driving 16Ω to 600Ω Loads and Line Level Inputs
• Ground-Referenced Output
• Ground-Sense Input Eliminates Ground-Loop Noise
• I²C Controls
• 32-Step Volume Control
• Channel-Independent Shutdown Control and Short-Circuit Protection
• 16-Bump, 0.4mm Pitch, 1.56mm x 1.56mm WLCSP Package