yemeipan：
我们公司目前用这款芯片6857做了几百片试产，这个电源的最大优点是PF和THD都很高，短路功耗很小，效率也很高，精度小批量3%，大批量5%，缺点最大功率只能做到20多瓦。下面是我们测试的一组数据。Fre(HZ)Vin(Vac)Pin(W)PFTHD(A%)Vo(V)Io(mA)Po(W)Efficiency508518.810.9938.3538.7842116.3386.80%11518.460.9955.1438.7241916.2287.89%13518.340.9944.5138.7041916.2288.41%18518.300.9893.7438.6941916.2188.59%23018.370.9803.4938.6942016.2588.46%26518.400.9704.3238.6742116.2888.48%