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| TAS5404－Q1高效小型100W汽车放大器参考设计 |
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| 文章来源： 更新时间：2016/3/10 11:53:00 |
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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, 32dB.本文介绍了TAS5404-Q1主要特性和框图,TAS5404-Q1主要特性和电路图与材料清单,以及100W汽车放大器参考设计PMP9484主要特性,电路图和材料清单.
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
评估板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.
图2.评估板TAS5404Q1EVM外形图(散热器去除以看得清楚)
图3评估板TAS5404Q1EVM主PCB布局图(顶层)
图4评估板TAS5404Q1EVM放大器PCB布局图(顶层)
图5评估板TAS5404Q1EVM放大器PCB布局图(底层)
图6评估板TAS5404Q1EVM主PCB电路图
图7评估板TAS5404Q1EVM放大器PCB电路图
评估板TAS5404Q1EVM主PCB材料清单:
评估板TAS5404Q1EVM放大器PCB材料清单:
高效小型100W汽车放大器参考设计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汽车放大器参考设计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
图8.100W汽车放大器参考设计PMP9484外形图(带升压转换器)
图9.100W汽车放大器参考设计PMP9484电路图(1)
图10.100W汽车放大器参考设计PMP9484电路图(2)
图11.100W汽车放大器参考设计PMP9484电路图(3)
图12.100W汽车放大器参考设计PMP9484电路图(4)
100W汽车放大器参考设计PMP9484材料清单(BOM):
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