TI TAS5404－Q1 26W汽车四路D类放大器参考设计 |电子通-应用新知，新电子的助推者电子通

TI公司的TAS5404-Q1是用于汽车音响主机的四路D类音频放器,四路模拟输入,四路BTL输出,每路能从14.4V电源中向4欧姆负载连续提供26W输出或向2欧姆负载连续提供45W输出,THD+N小于1%,75dB PSRR.每路增益为12 dB, 20 dB, 26 dB, 32 dB.本文介绍了TAS5404-Q1主要特性,框图和主要应用电路及其材料清单,汽车四路D类放大器参考设计TIDA-00573主要特性,框图,电路图,材料清单和汽车音响主机框图与主要指标.

The TAS5404-Q1 device is a four-channel class-D audio amplifier designed for use in automoTIve head units. The TAS5404-Q1 device provides four channels at 20 W conTInuously into 4 Ω at less than 1% THD+N from a 14.4-Vdc supply when used with the application circuit. The input is configured as an analog single-ended interface. The patented PWM topology of the device provides dramatic improvements in efficiency and audio performance over traditional linear amplifier solutions. The improvement in efficiency and audio performance reduces the power dissipated by the amplifier by a factor of ten under typical music playback conditions. The device incorporates all the required functions required by the OEM application. The built-in load diagnostic functions for detecting and diagnosing disconnected speakers help reduce test time during the manufacturing process.

TAS5404-Q1主要特性:

TAS5404-Q1 – Single-Ended Input
Four-Channel Class-D Power Amplifier
Four Analog Inputs, Four BTL Power Outputs
Typical Output Power at 10% THD+N
26 W/ChInto 4 Ω at 14.4 V
45 W/ChInto 2 Ω at 14.4 V
Channels Can Be Paralleled (PBTL) for High- Current Applications
THD+N < 0.02%, 1 kHz, 1 W Into 4 Ω
Patented Pop-and-Click-Reduction Technology
Soft Muting With Gain Ramp Control
Common-Mode Ramping
Patented AM Interference Avoidance
Patented Cycle-by-Cycle Current Limit
75dB PSRR
Four-Address I2C Serial Interface for Device
Configuration and Control
Channel Gains: 12 dB, 20 dB, 26 dB, 32 dB
Load Diagnostic Functions:
Output Open and Shorted Load
Output-to-Power and Output-to-Ground Shorts
Patented Tweeter Detection
Protection and Monitoring Functions:
Short-Circuit Protection
Load-Dump Protection to 50 V
Fortuitous Open-Ground and Open-Power Tolerant
Patented Output DC Level Detection While Music Playing
Overtemperature Protection
Overvoltage and Undervoltage Conditions
Clip Detection
64-Pin QFP (PHD) Power Package With Heat Slug Up
Designed for Automotive EMC Requirements
Qualified According to AEC-Q100
ISO9000:2002 TS16949-Certified
–40℃ to 105℃ Ambient Temperature Range

图1.TAS5404-Q1框图

图2.TAS5404-Q1典型应用电路图
图2TAS5404-Q1典型应用电路的材料清单:

汽车四路D类放大器参考设计TIDA-00573

The TIDA-00573 reference design provides a Class D based amplifier solution that allows it to be evaluated in the form factor of a typical Class AB amplifier. The design is optimized to mitigate thermals associated with audio amplifiers and to minimize switching noises associated with Class D amplifiers. This design is comprised of two parts. The 1st highlights the audio amplifier module while the 2nd highlights the circuitry needed to incorporate it into a base board. The pair of boards allows stand-alone performance testing of the design.

汽车四路D类放大器参考设计TIDA-00573主要特性:

Able to withstand load-dump conditions
Size/Space optimized design
CISPR-25 tested EMI
Able to withstand Start/Stop operation down to 5.6V