Features

l Single supply voltage

4.5V ~ 26V for loudspeaker driver Built-in LDO output 5V for others

l Supports Multiple Output Configurations BTL Mode: 30W/CH into 8W at 24 V BTL Mode: 30W/CH into 4W at 18 V PBTL Mode: 60W/CH into 4W at 24 V PBTL Mode: 45W/CH into 4W at 18 V PBTL Mode: 60W/CH into 2W at 18 V

l Loudspeaker performance

BTL Mode: 30W/CH into 8W <1% THD+N@24V BTL Mode: 30W/CH into 4W <1% THD+N@18V

l >90% efficient Class-D operation eliminates need for heat sink

l Differential inputs

l Four selectable, fixed gain settings

l Internal oscillator

l Short-Circuit protection with auto recovery option

l Under-Voltage detection

l Over-Voltage protection

l Pop noise and click noise reduction

l Adjustable power limit function for speaker protection

l Output DC detection for speaker protection

l Filter-Free operation

l Over temperature protection with auto recovery

l Superior EMC performance

Applications

l TV audio

l Boom-Box

l Powered speaker

l Monitors

l Consumer Audio Equipment

Description

The AD52090 is a high efficiency stereo class-D audio amplifier with adjustable power limit function. The loudspeaker driver operates from 4.5V~26V supply voltage and analog circuit operates at 5V supply voltage. It can deliver 30W/CH output power into 4W or 8W loudspeaker within 1% THD+N at 24V supply voltage.

AD52090 provides parallel BTL (Mono) application, and it can deliver 60W into 4W loudspeaker at 24V supply voltage. The adjustable power limit function allows user to set a voltage rail lower than half of 5V to limit the amount of current through the speaker.

Output DC detection prevents speaker damage from long-time current stress. AD52090 provides superior EMC performance for filter-free application. The output short circuit and over temperature protection include auto-recovery feature.

Simplified Application Circuit