MP4021变压器计算软件 1[1].0_20110121

1. System Spec

Input Spec

minimum line voltage Vin_ac_min85V maximum line voltage Vin_ac_max265V line frequency f50Hz maxmum DC voltage Vin_dc_max375V Output Spec

output voltage Vo16.00V output current Io0.500A output power Po8.00W estimate efficiency η87.0% input power Pin9.195W 2. Transformer Turns Ratio

primary voltage spike Vspike100V secondary output recitify diode forward voltage Vf0.7V reflected output voltage Vreflect100V

!Transformer Turns Ratio (Np:Ns1)N6 5.988024 maximum DS voltage of primary MOSFET Vds_max575V maximum reverse voltage of output diode V_diode_max79V 3. Transformer

switching frequency @minimum Vin, full load fs_min45kHz primary inductance Lp 2.262mH primary peak current @minimum Vin, full load Ip_max0.54A

Input Result

Typically, it is higher than 45kHz !

Green Cell Red Cell

Larger reflected output voltage means higher primary MOSFET voltage rating, while smaller means higher secondary rectifier

voltage rating. Typically, it is 100-150

larger Vspike can reduce the RCD snubber size! Typically, it is 100-150 !

EMI

filter

MULT

ZCD

VCC

GATE

CS

GND FB/NC COMP MP4021

rectifier

#REF!#REF!#REF!

temp

Voltage stress peak current rms current p5750.54#REF!