Powerint 公司的54W(200W峰值)音頻放大器電源參考設計RDR-203是采用PeakSwitch 系列的PKS607YN,可以替代用于音頻放大器的線性電源. PKS607YN集成了700V功率MOSFET,振蕩器,用與起動的高壓開關電流源,限流和熱關斷功能.此外還具有自動重器,線路欠壓檢測和頻率抖動. 新穎的參考設計RDR-203能消除標準浸漆變壓器所產品生的可聽見噪音.本文介紹了PeakSwitch系列器件的主要特性格,功能方框圖與采用PeakSwitch系列PKS606Y的 32 W(連續),81W(峰值)通用輸入電源電路圖.此外還主要介紹了54W(200W峰值)音頻放大器電源參考設計RDR-203主要的設計亮點,詳細電路圖和所用元件清單(BOM).
PeakSwitch is designed to address applications with high peak-to-continuous power ratio demands. The very high switching frequency during peak power loads and excellent load transient response reduce system cost as well as component count and size. PeakSwitch incorporates a 700 V power MOSFET, oscillator, high voltage switched current source for startup, current limit, and thermal shutdown onto a monolithic device. In addition, these devices incorporate auto-restart, line under-voltage sense and frequency jittering. An innovative design minimizes audio frequency components in the simple ON/OFF control scheme to practically eliminate audible noise with standard varnished transformer construction.
PKS607YN 亮點:
EcoSmart– Extremely Energy-Efficient
Standby output power ≥0.6 W for 1 W input (high line)
Sleep mode power ≥2.4 W at 3 W input (high line)
No-load consumption <200 mW at 265 VAC input
Surpasses California Energy Commission (CEC), ENERGY STAR, and EU requirements
PeakSwitch Features Reduce System Cost
Delivers peak power of up to three times maximum continuous output power
277 kHz operation during peak power significantly reduces transformer size
Programmable smart AC line sensing provides latching shutdown during short circuit, overload and open loop faults, and prevents glitches during power down or brownout
Two external components reset latch on AC removal
Adaptive switching cycle on-time extension increases low line peak output power, minimizing bulk capacitor size
Adaptive current limit reduces output overload power
Frequency jittering reduces EMI filter cost
Tight I2f tolerances and negligible temperature variation of key parameters ease design and lower cost
Accurate hysteretic thermal shutdown with automatic recovery provides complete system level overload protection and eliminates need for manual reset
Better System Cost/Performance over RCC & Discrete
Simple ON/OFF control – no loop compensation needed
Very low component count – higher reliability and single side printed circuit board
High bandwidth provides fast turn on with no overshoot and excellent transient load response
Peak current limit operation rejects line frequency ripple
Built-in current limit and hysteretic thermal protection
PKS607YN 應用:
Inkjet printer
Data storage, audio amplifier, DC motor drives
圖1.PKS607YN功能方框圖
圖2.采用PeakSwitch PKS606Y的 32 W(連續),81W(峰值)通用輸入電源
54W(200W峰值)音頻放大器電源參考設計RDR-203
Reference Design Report for a 54 W (200 W Peak) Audio Amplifier Power Supply Using PKS607YN This document is an engineering report describing a 54 W continuous, 200 W peak power supply design utilizing two PKS607YN power conversion ICs. This power supply is intended as a replacement for linear power supplies for audio amplifiers.
The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.
圖3.54W(200W峰值)音頻放大器電源參考設計RDR-203外形圖
圖4.54W(200W峰值)音頻放大器電源參考設計RDR-203電路圖
54W(200W峰值)音頻放大器電源參考設計RDR-203材料清單(BOM):
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