抗干扰AC/DC开关电源芯片的研究与设计

Introduction to Anti-jamming AC/DC Switching Power Supply Chip Research and Design

近些年来,随着新能源技术的飞速发展,研发一种高效节能、使用年限长的电源芯片成为热点。AC/DC开关电源转换器源以其价格、效率和体积等优势在小功率电源领域得到了广泛的应用。基于AC/DC开关电源转换器的工作原理,发现误差放大器对整个电源芯片的精度影响很大,据此提出一种组合式的误差放大器,将轻载到满载的电压输出降低到40 m V;并提出智能抗尖峰电路,减少了LEB结束与开关断开的时间差,使安全性能提高;最后,对本芯片进行试验测试,发现抗ESD能力达到10 k V,芯片性能稳定。希望对今后电源芯片设计提供参考。

In recent years, with tile rapid development of new energy technology, to develop ahigh efficiency, energy-saving, long service life power chips become a hot spot. With theadvantages on price, volume and efficiency, AC/DC switching power supply converter source hasbeen widely applied in the field of small power sources. Based on the working principle of AC/DCswitching power supply converter, it is found that the error amp has a great influence on thepreqsion of the power chip. A combined error amplifier is proposedreduce Ihe oulput wfltage of the light load to full load to 40 inV.suppression circuit is presented to reduee the time delay between theoff and improve lhe safety perfirmance. Finally, the chip is lested,resislance to ESD is up to 10 kV, and the perfnrmance is stable.accordingly, which eouhtAnd an intelligent peakI,EB end and the switch is and it is tound that ilsresistance to ESD is up to 10 kV, and the performance is stable.