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| R4301 90Wx2 D類(lèi)音頻放大器參考設計 |
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| 文章來(lái)源： 更新時(shí)間：2014/4/21 11:06:00 |
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IR公司的IR4301集成了PWM控制器和數字音頻MOSFET,組成了高性能的D類(lèi)音頻放大器,具有高峰值音樂(lè )輸出功率和不需要機械散熱器,可采用單電源或雙電源,差分或單端輸入,過(guò)流,超溫和欠壓保護與自重起功能,主要用在家庭影院,PC音頻系統,卡拉OK放大器,游戲控制臺,揚聲器,音樂(lè )設備以及通用音頻功率放大器.本文介紹了IR43x1主要特性, 功能方框圖,反相和差分放大器應用電路,以及IRAUDAMP21 90Wx2 D類(lèi)音頻放大器參考設計主要指標,電路圖,材料清單和PCB元件布局圖.
The IR43x1 integrates PWM controller and digital audio MOSFETs forming a high performance Class D audio amplifier. As a result of fully optimized MOSFETs co-packed with a dedicated controller IC, the IR43X1operates without mechanical heatsink attached in a typical music playback usage. High voltage ratings and noise immunity in the controller IC ensures reliable operation over various environmental conditions. A small 5x6 mm PQFN package enhances the benefit of smaller size of Class D topology. The IR43x1 are a lead-free, ROHS compliant.
IR43x1主要特性:
Integrated analog input Class D audio amplifier in a small 5 x 6 mm PQFN package
High peak music power output
No mechanical heatsink required
Split or single power supply
Differential or single-ended input
Over-current, over-temperature and under voltage protections with self-reset function
Start and stop click noise reduction
High noise immunity
RoHS compliant
圖1. IR4301功能方框圖
IR4301典型應用:
Home theatre systems
Docking station audio systems
PC audio systems
Musical instruments
Karaoke amplifiers
Game consoles
Powered speaker systems
General purpose audio power amplifiers
圖2. IR4301反相放大器電路圖
圖3. IR4301差分放大器電路圖
圖4. IR4301單電源應用電路圖
IRAUDAMP21參考設計
The IRAUDAMP21 reference design is a two-channel, 90W/ch (2Ω/±18V; no heatsink)/ 135W/ch (2Ω/±22V; *with heatsink) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IR4321 IC, implement protection circuits, and design an optimum PCB layout using PowIRaudio integrated Class D IC. This reference design does not require heatsink or fan cooling for normal operation (one-eighth of continuous rated power).The reference design provides all the required housekeeping power supplies for ease of use. The two-channel design is scalable for power and the number of channels.
圖5.IRAUDAMP21參考設計外形圖
IRAUDAMP21參考設計應用:
AV receivers
Home theater systems
Mini component stereos
Powered speakers
Sub-woofers
Musical Instrument amplifiers
Car audio amplifiers
IRAUDAMP21參考設計主要技術(shù)指標:
圖6.IRAUDAMP21參考設計電路圖:子板
圖7.IRAUDAMP21參考設計電路圖:主板音量控制和電源
圖8.IRAUDAMP21參考設計電路圖:時(shí)鐘和管理
IRAUDAMP21參考設計子板材料清單:
IRAUDAMP21參考設計主板材料清單:
圖9.IRAUDAMP21參考設計子板PCB布局圖:頂層
圖10.IRAUDAMP21參考設計子板PCB布局圖:底層
圖11.IRAUDAMP21參考設計主板PCB布局圖:頂層
圖12.IRAUDAMP21參考設計主板PCB布局圖:底層 |
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