The power supply unit consists of input stage, PFC stage, DC/DC stage, and control circuit. Input stage includes surge protect circuit, EMC circuit, soft-start-up circuit, etc. This circuits help to meet EMC regular of EN55032 etc. DC/DC stage delivers a desired output voltage. Control circuit carries out many functions as OVP, OLP, OTP, loop control.
Main components functions are described as below:
G2- input rectifier
EC8- Input Capacitor
Q1- PFC Mosfet
D9- PFC Output Diode
EC8- PFC Output Capacitor
Q2&Q3- DC/DC Mosfet
Q4&Q6- DC/DC Output Synchronic-Rectifiers
EC1- Output Capacitor
U- Isolated Opt couple for feedback control
Input
Input voltage range：90Vac to 264Vac
Normal voltage range：100Vac to 240Vac
Frequency range：47Hz-63Hz
Max input ac current：2A
Inrush current(cold state)：80Atyp peak@220Vac
Efficiency (full load)：88% @220Vac
Leakage Current：Less Than 1.0 mA,@ 220Vac input
Normal output power：105W
Input Fuse：T3.15A L/250Vac
Power Factor：>0.95 @ full Load 220Vac input
Output
Output Voltage：+4.2V
Regulation：±5%
Min.current：OA
Rated current：25A
Download Specification:
Megmeet MCP100WT LED Screen Power Supply Specification
