ml4801 Fairchild Semiconductor, ml4801 Datasheet - Page 12

• Manufacturer Part Number: ml4801
• Description: Variable Feedforward Pfc/pwm Controller Combo
• Manufacturer: Fairchild Semiconductor

ML4801
12
4A, 600V
300mΩ
BR1
1W
85 TO 265VAC
R5
AC INPUT
220nF
680nF
C19
C1
100nF
470nF
C3
C2
1N5401
1N5401
D12
D13
3.15A
357kΩ
357kΩ
R2A
F1
R2B
60kΩ
1nF
10nF
C11
75kΩ
13kΩ
249kΩ
249kΩ
R3
R4
R1A
R1B
270pF
C18
82kΩ
47µF
C30
R27
15V
470pF
Figure 9. 100W Power Factor Corrected Power Supply
IEAO
I AC
I SENSE
V RMS
SS
V DC
RTCT
RAMP 1
27kΩ
R12
IRF840
Q1
3mH
36.5kΩ
L1
ML4801
R6
220pF
22Ω
R21
PWM OUT
C7
180Ω
R28
20µF
PFC OUT
C12
"FRED " Diode
RAMP 2
8A, 600V
20kΩ
1µF
C6
GND
V REF
VDC
V CC
V FB
D1
10nF
C4
100µF
6.2kΩ
C5
R10
1N4745
16V
BYV26C
178kΩ
178kΩ
R7A
R7B
D3
1N5818
D8
220pF
C17
R15
3Ω
100nF
C20
1µF
C25
33Ω
R14
220Ω
T1
R19
10nF
C15
1N5818
4.7kΩ
33Ω
R17
D10
R30
IRF830
C16
1µF
Q3
IRF830
Q2
1.5Ω
R20
16V
D7
100nF
BYV26C
C13
D6
C14
1µF
BYV26C
D5
1.5kΩ
T2
L2: 15µH, 10A DC
T1: Premier Magnetics #PMGD- 03
T2: Premier Magnetics #TSD-1048
Premier Magnetics: [phone]
R23
L1: Premier Magnetics #TSD-734
2.37kΩ
MBR2545CT
R8
D11
10kΩ
TL431
C31
1nF
10kΩ
R26
1800µF
15µH
C21
L2
4.7µF
C22
768kΩ
100nF
100nF
REV. 1.1 3/9/2001
C23
R11
C8
1.2kΩ
R24
220Ω
C24
1µF
R18
10nF
C9
2.26kΩ
8.66kΩ
R25
R22
12VDC
RTN