基于TNY266P芯片的小功率开关电源设计

摘要

Based on the careful analysis of switching power supply working principle and design parameters, a switching power supply based on TNY266P chip is presented. The key design is high frequency transformer circuit and optical coupling feedback circuit based on TL431. As the test results show our designed switching power supply has good performance in high effective, produced corrugation voltage stabilization and high volt-age adjustment rate.%在分析开关电源工作原理和特点的基础上，根据要求，设计了一款基于TNY266P芯片的小功率开关电源，其核心为高频变压器电路和TL4TL431光耦合反馈电路。测试表明，该开关电源效率高、纹波小、输出电压稳定，性能优良，具有频响快、电压调整率高的特点。