CM6802BH

CM6802A/B/AH/BH (Dynamic Soft PFC/Green PWM) http://www.championmicro.com.tw EPA/80++ ZVS-Like PFC/PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load GENERAL DESCRIPTION Switching to CM6802A/B/AH/BH from your existing CM6800 family boards can gain the following advanced performances: 1.) Around 2% efficiency gain when the output load is below 40% of the full load. 2.) Hold Up time can be increased ~ 30% from the existing 6800 power supply. 3.) 420V bulk capacitor value may be reduced PFC boost ripple current can be reduced; therefore, the boost inductor core size maybe reduced. 4.) No Load Consumption can be reduced 290mW at 270VAC. 5.) PWM transformer size can be smaller. 6.) To design 12V, 5V and 3.3V output filters can be easy. 7.) The stress over the entire external power device is reduced and EMI noise maybe reduced. 8.) Monotonic Output design is easy and more…Of cause, the cost will be reduced. CM6802A/B/AH/BH is pin to pin compatible with CM6800 family. Beside all the goodies in the CM6800, it is designed to meet the EPA/80+ regulation. With the proper design, its efficiency of power supply can easily approach 85%. To start evaluating CM6802A/B/AH/BH from the exiting CM6800,CM6800A or ML4800 board, 6 things need to be taken care before doing the fine tune: 1.) Change RAC resistor (on pin 2, IAC) from the old value to a higher resistor value between 4.7 Mega ohms to 8 Mega ohms. 2.) Change RTCT pin (pin 7) from the existing...