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
16
1
13
VCC
VEAO
IEAO
PFC OVP
+
-
VFB
.
GMv
+
-
16.5V
Zener
2.85V
.
Rmul
VREF
14
GMi
7.5V
+
-
2.5V
PFC CMP
.
+
REFERENCE
PFC Tri-Fault
VFB
15
-
+
0.5V
VFB
GAIN
MODULATOR
-
S
Q
Q
VCC
VCC
Rmul
PFC ILIMIT
R
IAC
2
MPPFC
+
-1.0V
ISENSE
-
PFC RAMP
PFC OUT
12
S
Q
Q
VRMS
4
Green PFC
R
+
0.3V
VEAO
ISENSE
RAMP1
17V
ZENER
3
7
-
MNPFC
PFC
PFCCLK
.
Figure 1. PFC Section Block Diagram
2009/11/02 Rev. 1.4
Champion Microelectronic Corporation
18