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.

Features

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

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

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

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

Differential inputs

Four selectable, fixed gain settings

Internal oscillator

Short-Circuit protection with auto recovery option

Under-Voltage detection

Over-Voltage protection

Pop noise and click noise reduction

Adjustable power limit function for speaker protection

Output DC detection for speaker protection

Filter-Free operation

Over temperature protection with auto recovery

Superior EMC performance

Applications

TV audio

Boom-Box

Powered speaker

Monitors

Consumer Audio Equipment

DEMO实物图

典型应用原理图