分享一下APFC控制片FAN7527的变压器计算方法

在飞兆的官网上找到一个35w左右的LED恒流源电路，但是没有变压器的详细指标，谁知道怎样计算变压器的各参数，分享一下？



Typical Application: LED Table Lamp

This solution for an isolated LED ballast consists of the FAN7527 boundary mode PFC controller, the FAN4272IMU8

dual RRIO CMOS amplifi er and the FQPF6N70 QFET MOSFET. The input voltage range is 185VRMS to 265VRMS and

the solution features one DC output with a constant current of 700mA @ 48V max.

• Single stage high power factor design

• Very cost effective

• Effi ciency >85% at full load

• PF > 0.93 at nominal input voltage

• Output current can be easily adjusted