[原创] TI TAS2770 20W数字输入D类音频放大器解决方案

TI公司的TAS2770是具有扬声器I/V检测的数字输入单声道20W输入D类音频放大器,在12.6V电压时能向4-Ω负载提供15.4W峰值功率,连续功率11.6W,THD+N小于0.03%,VBAT电压为4.5 V到16 V,主要用在平板电脑,蓝牙扬声器,家庭自动化和智能扬声器/物联网(IoT).本文介绍了TAS2770主要特性,框图,应用电路以及PC立体声音频参考设计TIDA-01572主要特性,框图,电路图,材料清单和PCB设计图.

The TAS2770 is a mono, digital input Class-D audioamplifier optimized for efficiently driving high peakpower into small loudspeakers. The Class-D amplifieris capable of delivering 15.4 W of peak power into a4-Ω load while sustaining 11.6 W continuously with less than 0.03 % THD+N at a battery voltage of 12.6V.

Integrated speaker voltage and current senseprovides for real time monitoring of loudspeakerbehavior. A battery tracking peak voltage limiter withbrown out prevention optimizes amplifier headroomover the entire charge cycle of 2S or 3S batterysystems.Up to eight devices can share a common bus viaeither I2S/TDM + I2C.

The TAS2770 device is available in a 26-pin, 0.4-mmpitch QFN for a compact PCB footprint.

TAS2770主要特性:

1• High-Performance Mono Class-D Amplifier
– 20-W at 1% THD+N (4 Ω, 16 V)
– 15.4-W at 1 % THD+N (4 Ω, 12.6 V)
– 9.1-W at 1 % THD+N (8 Ω, 12.6 V)..

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