TI TPA2011D1 3.2W高效无滤波器D类功率放大方案

TI 公司的TPA2011D1是3.2W高效无滤波器D类音频功率放大器,1.21 mm×1.16 mm WCSP封装,仅需三个外接元件.输出功率3.24W(4Ω,5V,10% THDN),输出噪音20uV,集成了反馈电阻300k欧和镜像抑制滤波器以降低DAC噪音,静态电流仅为1.5mA,适用于手机和PDA,PND以及通用手提音频设备.本文介绍TPA2011D1主要特性,功能方框图,多种应用电路以及评估模块TPA2011D1EVM 电路图和材料清单(BOM).

The TPA2011D1 is a 3.2-W high efficiency filter-free class-D audio power amplifier (class-D amp) in a 1,21 mm×1,16 mm wafer chip scale package (WCSP) that requires only three external components.

Features like 95% efficiency, 86-dB PSRR, 1.5 mA quiescent current and improved RF immunity make the TPA2011D1 class-D amp ideal for cellular handsets. A fast start-up time of 4 ms with no audible turn-on pop makes the TPA2011D1 ideal for PDA and smart-phone applications. The TPA2011D1 allows independent gain while summing signals from separate sources, and has a low 20 µV noise floor.

TPA2011D1主要特性:

Powerful Mono Class-D Amplifier

3.24 W (4Ω, 5 V, 10% THDN)

2.57 W (4Ω, 5 V, 1% THDN)

1.80 W (8Ω, 5 V, 10% THDN)

1.46 W (8Ω, 5 V, 1% THDN)

Integrated Feedback Resistor of 300 kΩ

Integrated Image Reject Filter for DAC Noise Reduction
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