TI TPA2037D1 3.2W高效D类音频功率放大方案

TI公司的TPA2037D1是3.2W高效无滤波器D类音频功率放大器,固定增益6dB,器件仅需外接一个.TPA2037D1的效率95%,静态电流1.5mA,关断电流0.1uA,PSSR为81dB,输出噪音20uV.主要应用在手机,PDA,手提导航设备和通用手提音频设备.本文介绍TPA2037D1主要特性,功能方框图,多种应用电路以及评估板TPA2037D1EVM主要指标,电路图和元件列表.

The TPA2037D1 is a 3.2 W high efficiency filter-free class-D audio power amplifier (class-D amp) with 6 dB of fixed gain in a 1.21 mm x 1.16 mm wafer chip scale package (WCSP). The device requires only one external component.

Features like 95% efficiency, 1.5 mA quiescent current, 0.1 µA shutdown current, 81-dB PSRR, 20 µV output noise, and improved RF immunity make the TPA2037D1 class-D amplifier ideal for cellular handsets. A start-up time of 4 ms with no audible pop makes the TPA2037D1 ideal for PDA and smart-phone applications.

TPA2037D1主要特性:

Powerful Mono Class-D Speaker 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)

+6 dB Fixed Gain

Integrated Image Reject Filter for DAC Noise Reduction

Low Output Noise of 20 µV

Low Quiescent Current of 1.5 mA

Differential Input Impedance of 300 kΩ

Auto-Recovering Short-Circuit Protection

Thermal-Overload Protection

Filter-Free Mono Class-D Amp

9-Ball 1,21 mm×1,16 mm 0,4mm Pitch WCSP

TPA2037D1应用:

• Powerful Mono Class-D Speaker Amplifier

• Wireless or Cellular Handsets and PDAs

• Portable Navigation Devices

• General Portable Audio Devices

图1.TPA2037D1功能方框图

图2.DC耦合差分输入TPA2037D1应用电路图

图3.差分输入和输入电容的TPA2037D1应用电路图

图4.单端输入TPA2037D1应用电路图

评估板TPA2037D1EVM

TPA2037D1 Audio Power Amplifier Evaluation Module

The TPA2037D1 evaluation module (EVM) consists of a TPA2037D1 device and all necessary components to evaluate it.

TPA2037D1EVM Specifications



图5.评估板TPA2037D1EVM电路图

TPA2037D1EVM 元件列表: