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| TAS5404－Q1高效小型100W汽車放大器參考設計 |
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| 文章來源： 更新時間：2016/3/10 11:53:00 |
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TI公司的TAS5404-Q1是用于汽車音響主機的四路D類音頻放器,四路模擬輸入,四路BTL輸出,每路能從14.4V電源中向4歐姆負載連續(xù)提供26W輸出或向2歐姆負載連續(xù)提供45W輸出,THD+N小于1%,75dB PSRR.每路增益為12 dB, 20 dB, 26 dB, 32dB.本文介紹了TAS5404-Q1主要特性和框圖,TAS5404-Q1主要特性和電路圖與材料清單,以及100W汽車放大器參考設計PMP9484主要特性,電路圖和材料清單.
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
評估板TAS5404Q1EVM
This user’s guide describes the operation of the TAS5404Q1EVM. The TAS5404Q1EVM utilizes thePurePath Console 3 graphical user interface with the TAS5404Q1EVM plugin.
The hardware consists of two pcbs that are soldered together through a dual row connector. The mainboard incorporates a TAS1020B for the USB interface through a micro USB connector. A 3.3-Vdc linearregulator provides 3.3 Vdc for the system. The TAS1020B converts the USB protocol to the appropriateI2C address and data. The audio signals are provided through the 3.5-mm female jacks. There are twojumpers, J3 and J4 to short the two 3.5-mm jacks so only one stereo pair is needed to provide signal to allfour channels of the TAS5404-Q1. Connect the provided USB cable to J9 and the PC. The USB does not provide audio for this EVM.
圖2.評估板TAS5404Q1EVM外形圖(散熱器去除以看得清楚)
圖3評估板TAS5404Q1EVM主PCB布局圖(頂層)
圖4評估板TAS5404Q1EVM放大器PCB布局圖(頂層)
圖5評估板TAS5404Q1EVM放大器PCB布局圖(底層)
圖6評估板TAS5404Q1EVM主PCB電路圖
圖7評估板TAS5404Q1EVM放大器PCB電路圖
評估板TAS5404Q1EVM主PCB材料清單:
評估板TAS5404Q1EVM放大器PCB材料清單:
高效小型100W汽車放大器參考設計PMP9484
PMP9484 is a 100W highly efficient and compact automotive amplifier reference design which can be used in 50W +50W stereo or 100W woofer applications. The design is broadly divided into three main stages:
1.) Highly efficient single-phase synchronous boost converter using the LM5122 controller IC. The design accepts an input voltage of 7.5Vin to 20Vin (12Vin nominal) and provides an output of 24V capable of supplying 5A of continuous current to the load. The peak efficiency acheived is 98 percent.
2.) 50W+ 50W stereo audio amplifier with TPA3116D2 Class D device
3.) Very low cost stereo input to woofer bass input conversion
100W汽車放大器參考設計PMP9484主要特性:
Synchronous rectification in boost for very high efficiency
Ultra-low footprint area for LM5122
Actual power stage combo with highly efficient class D amplifier
Single speaker (woofer), dual speaker (stereo) support in the design
Low Vin support for automotive application
圖8.100W汽車放大器參考設計PMP9484外形圖(帶升壓轉換器)
圖9.100W汽車放大器參考設計PMP9484電路圖(1)
圖10.100W汽車放大器參考設計PMP9484電路圖(2)
圖11.100W汽車放大器參考設計PMP9484電路圖(3)
圖12.100W汽車放大器參考設計PMP9484電路圖(4)
100W汽車放大器參考設計PMP9484材料清單(BOM):
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