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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 8? at 24 V

BTL Mode: 30W/CH into 4??at 18 V

PBTL Mode: 60W/CH into 4??at 24 V

PBTL Mode: 45W/CH into 4??at 18 V

PBTL Mode: 60W/CH into 2??at 18 V

? Loudspeaker performance

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

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

? >90% efficient Class-D operation eliminates

need for heat sink

? Energy Saving Class-D Operation

Low Idle Current <23mA

? Multiple Switching Frequencies

AM Avoidance

Master/Slave Synchronization

300KHz to 1.2MHz Switching Frequency

? Differential inputs

? Four selectable, fixed gain settings

? Internal oscillator

? Short-Circuit protection with auto recovery

? Under-Voltage detection

? Over-Voltage protection

? Pop noise and click noise reduction

? Adjustable Automatic Gain Control or adjustable

power limit function for speaker protection

? Output DC detection for speaker protection

? Thermal fold-back control

? Over temperature protection with auto recovery

Applications

? TV audio

? Boom-Box

? Powered speaker

? Monitors

? Consumer Audio Equipment

Description

The AD52070 is a high efficiency stereo class-D

audio amplifier with adjustable power limit function.

It can deliver 30W/CH output power into 4? or

8??loudspeaker within 1% THD+N at 24V supply

voltage. AD52070 also provides parallel BTL (Mono)

application, and it can deliver 60W into 4?

loudspeaker at 24V supply voltage.

The AD52070 has low idle current mode for

battery-powered audio system and helps to extend

the battery life. The advanced oscillator/PLL circuit

employs a multiple switching frequency option to

avoid AM interferences. In order to achieve

multi-channels application, which the clock slave

mode design with, making it possible to synchronize

multiple devices.

The Automatic Gain Control (AGC) is enabled to

prevent output signal from distortion when the input

signal exceeds a threshold level. The AGC allows

adjustment of maximum output voltage without

signal clipping for enhanced speaker protection and

audio quality. The power-limit control can provide

further limit output power level of amplifier. The

adjustable power limit function allows user to set a

voltage to limit the amount of current through the

speaker. All these functions are performed

automatically.

Output DC detection prevents speaker damage

from long-time current stress. AD52070 output short

circuit and over temperature protection include

auto-recovery feature.