【摘要】 针对传统开关电源运用于功放场合的缺陷,设计了一种基于IRS2500S芯片的APFC(有源功率因数校正)单端反激式变换电路。运用单周期控制技术,采用弱反馈方式,来适应功放电源的指标要求,最后给出100 W样机的实验波形及性能分析。实验结果表明,该功放电源具有效率高、输出纹波小、瞬时功率大、功率因数高等特点。此外,相比于传统电源,该电源的大动态负载输出更加稳定,更适于功放电源的运用场合。更多还原

【Abstract】 According to the drawback of the traditional switching power supply used in the power amplifier,a single-ended flyback( APFC) converter circuit based on IRS2500S chip is designed. The OCC control technology and the weak feedback are used to meet the indication requirements of power amplifier. Finally,the experimental waveforms of the 100W power supply and the analysis of its performance are given. The experimental results show that the power amplifier has advantages of high efficiency,small ripple,great instantaneous power,high power factor and so on. In addition,when compared with the traditional power supply,the large dynamic load output of the designed power supply is more stable than the traditional one,which is more suitable for applications of the power amplifier.更多还原