CM6800
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
APPLICATION CIRCUIT (Voltage Mode)
R5
R3
EMC FILTER
IVIN
IVIN_EMC
PFC_VIN
D4
L1
L2
L3
IL1
D5
RT1
IVIN
PFC_VIN
IBOOT
D5
PFC_Vout
PFC_Vout
IAC
IC10
Q3
Q4
VIN
AC
C2
R2
C3
C8
R1
R10
R11
R12
R14
C33
100n
D12
D10
R22
22
PFC_DC
Q1
R26
18k
R16A
R17A
R65A
Q2N2222
MUR1100
1N4148
R23
C10
Q2
Q2N904
C23
R24
22
470p
R13
R15
R18
75
R25
10k
VFB
D6
D7
C55A
C41
C30
1N4002
1N4002
R58
C43
R64
R59
IEAO
U2 CM6800/01/24
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VEAO
IEAO
IAC
VEAO
VFB
ISENSE
VREF
VREF
C54
I-SENSE VREF
R60
VRMS
VCC
VCC
VRMS
SS
VCC
C46
C52
1u
C53
SS
PFC-OUT
100n
VDC
C47 VREF
VDC PWM-OUT
RAMP1 GND
RAMP2 ILIMIT
R66
C45
PWM_OUT
R63
ZD2
R56
R57
C49
C57
C44
VCC
C56
R62
C48
C50
R61
470
ILIMIT
C51
R44
C4
ISO1
VDC
C14
PWM_IN
PFC_Vout
R34
C38
C7
10n
R27
100k
C22
10n
10n
4.7
R49
C39
R43
IL4
L4
L5
R46
C40
D9A
PWM_Vout
IC17
C17
IC18
R45
ILOAD
D8
MUR1100
R35
4.7
D13
T1
D9B
C18
C19
PWM_Rload
500m
U1
CM431
MUR1100
C22
10n
R48
C15
10n
VCC
IBIAS
R32A
R32
D16
C34
100n
VCC
C31
1N4148
R33
Q6
Q2N2222
PWM_DC
R28
22
T 2:3
PWM_OUT
Q7
Q2N904
Q3
R29
10k
ILIMIT
R31
ZD1
6.8V
2008/10/23 Rev. 2.1
Champion Microelectronic Corporation
Page 15
CHAMP [ CHAMPION MICROELECTRONIC CORP. ]
