ADI ADAU1513 2路BTL音频D类放大方案

ADI 公司的ADAU1513 是2路BTL音频D类放大级,能高效地驱动15W 4欧姆扬声器负载. ADAU1513采用从ADAV4201处理器输入的3.3V差分PWM信号输入,具有热保护和输出短路保护.工作电压从9V到18V,效率大于90%.可用于平板电视,PC音频系统和小型部件.本文介绍了ADAU1513的主要特性,方框图, 应用方框图以及EVAL-ADAU1513评估板元件布局图和电路图于所用材料清单(BOM).

The ADAU1513 is a 2-channel bridge-tied load (BTL) Class-D audio power stage. The power stage can drive the speaker loads of 4 Ω at up to 15 W per channel at high efficiency. The 4-channel audio system can be formed when used with an ADAV4201 pulse-width modulator (PWM) processor using two ADAU1513s. The power stage accepts a 3.3 V logic differential PWM as input from an ADAV4201 processor. The power stage comprises thermal and output short-circuit protection with logic-level error flag outputs for interfacing to a system microcontroller along with reset and mute control of the power stage. The power stage operates from a range of power supply voltages from 9 V up to 18 V. The low power digital logic operates from a 3.3 V supply. The power stage can be used with modulators other than the ADAV4201. Contact your local sales department for application assistance.
ADAU1513主要特性:
Integrated stereo power stage
RDS-ON < 0.3 Ω (per transistor)
Efficiency > 90%
Short-circuit protection
Overtemperature protection
ADAU1513应用:
Flat panel televisions
PC audio systems
Mini components



图1. ADAU1513方框图



图2.ADAU1513应用方框图

EVAL-ADAU1513评估板
The EVAL-ADAU1513/ADAU1590/ADAU1592 is simple and user friendly for quick evaluation of the ADAU1513, ADAU1590, and ADAU1592 Class-D amplifiers. The board can deliver up to 15 W of output power. The power supply operating range is 9 V to 18 V. The typical load impedance is 6 Ω, but it is possible to configure for 4 Ω or 8 Ω with few component changes.
EVAL-ADAU1513评估板主要特性:
For the evaluation of ADAU1513, ADAU1590, and ADAU1592 2x15W audio amplifiers
THD + N better than 85 dB @ 1 W for ADAU1590, and ADAU1592
SNR better than 100 dB for ADAU1590, and ADAU1592
Pop-and-click noise suppression
Built in output short-circuit protection, thermal protection, undervoltage protection
APPLICATIONS
LCD/plasma TVs Home
Theaters Mini/micro systems
Powered speakers
iPod docking stations



图3.EVAL-ADAU1513评估板元件布局图



图4.EVAL-ADAU1513评估板电路图

EVAL-ADAU1513评估板材料清单(BOM):