CM6800A Datasheet, PDF (16/18 Pages) Champion Microelectronic Corp. – LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO

CM6800A
LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO
APPLICATION CIRCUIT (Current Mode)
IVIN_EMC
R5 EMC FILTER R3
L2
L3
VIN
AC
R2 C3
IVIN
RT1
IVIN
D4
PFC_VIN
C8 R1
C2
R18
D6
D7
1N4002 1N4002
R59
C46
PFC_VIN
IAC
IBOOT
R10
R12
R14
R11
R13
R15
IL1
L1
Q3 Q4
C33
D12
R22
100n
Q1
PFC_DC
R26
Q2N2222
1N4148
22
18k
Q2
Q2N904
R23
R24
75
R25 ²²
10k
C23
470p
VFB
R64
R60
R66
C44 C45
C41
C30
R58 C43
ISENSE
VRMS
SS
C47 VREF
VDC
R56
R57
ILIMIT
IEAO
U2 CM6800/01/24
1
16
IEAO VEAO
2 _IAC
VFB ¹⁵
3
14
I-SENSE VREF
4 _{VRMS VCC} 13
5 _{SS PFC-OUT} 12
6 _{VDC PWM-OUT} 11
7
10
RAMP1 GND
8 _{RAMP2 ILIMIT} 9
VEAO
VREF
VCC
VCC
C52 C53
1u 100n
PWM_OUT ZD2
VREF
C54
D5
D5
PFC_Vout
PFC_Vout
IC10
D10
R16A
MUR1100
C10
R17A
C55A
R65A
R63
C57
C56
R67
C48
R62
C49
C50
ILIMIT ^{R61 470}
C51
R68
R44
PFC_Vout
PWM_IN
C14 _R34
C4
ISO1
VDC
C38
C7
R27
C22
10n
100k
10n
10n 4.7
D9A
IL4 _L4
D13
MUR1100
C15
D8
T1
MUR1100
R35
D9B
4.7
C22
10n
L5
IC17
IC18
PWM_Vout
ILOAD R45
R49
R43
R46 C40
C39
C17
C18
C19
PWM_Rload
500m
U1
CM431
R48
10n
VCC
C34
100n
PWM_OUT
Q6
Q2N2222
R28
PWM_DC
Q7
22
Q2N904
Q3
R29
10k
IBIAS
D16
R32A
R32
VCC
1N4148
C31
R33
T 2:3
ILIMIT
R31
ZD1
6.8V
2006/10/11 Rev. 1.3
Champion Microelectronic Corporation
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