在飛兆的官網(wǎng)上找到一個(gè)35w左右的LED恒流源電路，但是沒(méi)有變壓器的詳細(xì)指標(biāo)，誰(shuí)知道怎樣計(jì)算變壓器的各參數(shù)，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