TI公司的TAS5404-Q1是用于汽車(chē)音響主機(jī)的四路D類(lèi)音頻放器,四路模擬輸入,四路BTL輸出,每路能從14.4V電源中向4歐姆負(fù)載連續(xù)提供26W輸出或向2歐姆負(fù)載連續(xù)提供45W輸出,THD+N小于1%,75dB PSRR.每路增益為12 dB, 20 dB, 26 dB, 32 dB.本文介紹了TAS5404-Q1主要特性,框圖和主要應(yīng)用電路及其材料清單,汽車(chē)四路D類(lèi)放大器參考設(shè)計(jì)TIDA-00573主要特性,框圖,電路圖,材料清單和汽車(chē)音響主機(jī)框圖與主要指標(biāo).

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

圖1.TAS5404-Q1框圖

圖2.TAS5404-Q1典型應(yīng)用電路圖
圖2TAS5404-Q1典型應(yīng)用電路的材料清單:

汽車(chē)四路D類(lèi)放大器參考設(shè)計(jì)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.

汽車(chē)四路D類(lèi)放大器參考設(shè)計(jì)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

圖3.汽車(chē)四路D類(lèi)放大器參考設(shè)計(jì)TIDA-00573外形圖

圖4.汽車(chē)四路D類(lèi)放大器參考設(shè)計(jì)TIDA-00573框圖

圖5.集成了TIDA-00573的汽車(chē)音響主機(jī)框圖
汽車(chē)音響系統(tǒng)主要指標(biāo):

圖6.子板3D外形圖

圖7.主板3D外形圖

圖8.參考設(shè)計(jì)TIDA-00573電路圖(1)

圖9.參考設(shè)計(jì)TIDA-00573電路圖(2)

圖10.參考設(shè)計(jì)TIDA-00573電路圖(3)

圖11.參考設(shè)計(jì)TIDA-00573電路圖(4)

圖12.參考設(shè)計(jì)TIDA-00573電路圖(5)

圖13.參考設(shè)計(jì)TIDA-00573電路圖(6)
參考設(shè)計(jì)TIDA-00573材料清單:

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tas5404-q1.pdf