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CM6802SBH

Champion Microelectronic
Part Number CM6802SBH
Manufacturer Champion Microelectronic
Description PFC+PWM COMBO CONTROLLER
Published Jun 12, 2016
Detailed Description CM6802SAH/SBH (Turbo-Speed PFC+Green PWM) http://www.championmicro.com.tw EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Desi...
Datasheet PDF File CM6802SBH PDF File

CM6802SBH
CM6802SBH

Overview
CM6802SAH/SBH (Turbo-Speed PFC+Green PWM) http://www.
championmicro.
com.
tw EPA/85+ ZVS-Like PFC+PWM COMBO CONTROLLER Design for High Efficient Power Supply at both Full Load and Light Load GENERAL DESCRIPTION CM6802SAH/SBH is a turbo-speed PFC and a Green PWM controller.
It is designed to further increase power supply efficiency while using the relatively lower 380V Bulk Capacitor value.
Switching to CM6802SAH/SBH 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.
) Turbo Speed PFC may reduce 420 Bulk Capacitor size 4.
) 420V bulk capacitor value may be reduced and PFC Boost Capacitor ripple current can be reduced 5.
) No Load Consumption can be reduced 290mW at 270VAC 6.
) Better Power Factor and Better THD 7.
) Clean Digital PFC Brown Out 8.
) PWM transformer size can be smaller 9.
) Superior Surge Noise Immunity 10.
) To design 12V, 5V, and 3.
3V output filters can be easy 11.
) The stress over the entire external power device is reduced and EMI noise maybe reduced; PFC inductor core might be reduced 12.
) Monotonic Output design is easy 13.
) And more… Of course, the cost can be reduced CM6802SAH/SBH is pin to pin compatible with CM6800 family.
Beside all the goodies in the CM6800, it is designed to meet the EPA/85+ regulation.
With the proper design, its efficiency of power supply can easily approach 85%.
To start evaluating CM6802SAH/SBH 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 ohm to 8 Mega ohm.
Start with 6 Mega ohm for RAC first.
2.
) Change RTCT pin (pin 7) from the existing value to RT=5.
88K ohm and CT=1000pF to have fpfc=68Khz, fpwm=68Khz, frtct=272Khz for CM6802SAH and fpfc=68Khz, fpwm=136Khz, frtct=272Khz...


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