説明

The AS1701 and AS1706 are 1.6W bridged audio power amplifiers that provide excellent circuit reliability, providing a very low-cost solution by eliminating external components when used with 2.7 to 5.5V-powered circuits. The devices have superb total harmonic distortion (THD) at highpower output and excellent power supply rejection with 4- and 8 Ohm-loads. Integrated over-temperature and over-current protection circuitry switch the devices off in case of an output short-circuit. A digital input allows the devices to automatically switch into shutdown mode. Click- and pop suppression circuitry reduces audible clicks and pops during power-up and shutdown. The gain (AV) of the devices is controlled using external resistors. The AS1701/AS1706 are pin compatible with the LM4891 and the MAX9716.

The AS1701/AS1706 are available in an 8-pin MSOP package.

A Demoboard for evaluation of AS1701/AS1706 audio power amplifiers is available.

主な機能

•  1.6W Output Power
•  2.7 to 5.5V (VDD) Single-Supply Operation
•  65dB PSRR @ 217Hz
•  THD+N: 1.6W into 4Ohm at 1%
•  No Output Coupling Capacitors Required
•  External Gain Configuration Capability
•  10nA Low-Power Shutdown Mode (AS1701 Active-High, AS1706 Active-Low)
•  Click and Pop Suppression
•  Pin-Compatible with National Semiconductor LM4891 and Maxim MAX9716
•  Over-Temperature and Over-Current Protection
•  Operating Temperature Range: -40 to +85°C
•  8-pin MSOP Package

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The AS1701/AS1706 are ideal as audio front-ends for battery powered audio devices such as MP3 and CD players, mobile phones, PDAs, portable DVD players, External portable Speakers, Baby Phones, Walkie-Talkies and any other hand-held battery-powered device.

The AS1701/AS1706 are also a great match for audio output in Medical and Industrial Devices or White Goods.

Block diagram for AS1701 Audio Amplifier IC