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AnalogicTech’s reveals first Class D Audio Amplifier

Advanced Analogic Technologies Incorporated has introduced the company's first Class D audio amplifier which builds on the company's experience building power management ICs for portable applications.

The AAT5101, 2.5 W Class D audio amplifier delivers dramatic power savings by combining low voltage operation with low quiescent current and standby current an order of magnitude below competitive devices.

“While the Lithium-ion batteries currently used in most portable systems today shutdown at 2.5 V, a new generation of batteries coming onto the market are designed to operate at much lower voltages,” said CJ Zhang, product line vice president. “By supporting operation down to 2.1 V and offering very low quiescent and standby current, the AAT5101 offers designers of cell phones, notebooks, GPS and navigation devices an opportunity to significantly reduce power requirements and extend battery life.”

This new mono class D audio power amplifier operates across a wide 2.1 V to 5.5 V supply voltage making it ideal for systems using next generation low voltage Li-ion/polymer batteries. To further extend battery life, the audio amplifier delivers up to 92 percent efficiency and offers a very low 0.06 uA shutdown current and 1.35 mA quiescent current.

The AAT5101 outputs 1.35 W with an 8 ohm load and THD+N < 1 percent and 2.5 W with a 4 ohm load and THD+N < 10 percent. Its low noise, filterless PWM architecture simplifies system design by eliminating the output filter, reducing external component count and system cost. To ensure clean sound across the entire audio output range, the AAT5101 delivers 0.12 percent THD+N at 5 V with 8 ohm load and Pout = 1.0 W. PSRR is -60 dB typical, while SNR is 91 dB typical. The new audio amplifier also features integrated thermal and short circuit protection circuitry with self-recovery to protect the device from damage during over current conditions. Proprietary circuitry suppresses pop and click noise.

Availability and Pricing

The AAT5101 is qualified across the -40 C to +85 C temperature range. The new audio amplifier is available in compact 9-pin wafer-level chip scale packaging (WLCSP) and sells for $0.28 in 1K quantities.

Datasheet for the: AAT5101

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