ML4827 Fairchild, ML4827 Datasheet - Page 14

• Manufacturer Part Number: ML4827
• Description: Fault-Protected PFC and PWM Controller Combo
• Manufacturer: Fairchild

ML4827
synchronized switching, the ripple voltage of the first stage
is reduced. Calculation and evaluation have shown that the
120Hz component of the PFC’s output ripple voltage can be
reduced by as much as 30% using this method.
14
4A, 600V
KBL06
300mΩ
BR1
85 TO 265VAC
1W
R5
AC INPUT
470nF
C1
Figure 7. 100W Power Factor Corrected Power Supply, Designed Using Micro Linear Application Note 33
470nF
470nF
C3
C2
1N5401
1N5401
C19
D12
D13
1µF
3.15A
357kΩ
357kΩ
R2A
R2B
F1
75kΩ
13kΩ
499kΩ
499kΩ
R3
R4
R1A
R1B
10nF
C11
330µF
39kΩ
C30
R27
2W
470pF
C18
1
2
3
4
5
6
7
8
IEAO
I AC
I SENSE
V RMS
SS
V DC
RAMP 1
RAMP 2
27kΩ
R12
IRF840
3.1mH
Q1
L1
ML4827-1
220pF
22Ω
R21
C7
41.2kΩ
PWM OUT
DC I LIMIT
PFC OUT
180Ω
R6
R28
15L9R460P2
8A, 600V,
1nF
VEAO
C6
V REF
GND
10µF
V CC
V FB
C12
10nF
D1
C4
16
15
14
13
12
11
10
9
6.2kΩ
R10
RGF1J
D3
178kΩ
178kΩ
R7A
R7B
100µF
C5
1N5818
220pF
D8
C17
Typical Applications
Figure 7 is the application circuit for a complete 100W
power factor corrected power supply. This circuit was
designed using the methods and topology detailed in Appli-
cation Note 33.
R15
100nF
3Ω
C20
1µF
C25
R14
33Ω
220Ω
T1
R19
10nF
C15
1N5818
4.7kΩ
R17
33Ω
R30
D10
IRF830
C16
1µF
IRF830
Q3
Q2
1.1Ω
R20
15V
D7
100nF
RGF1J
C13
D6
C14
1µF
RGF1J
D5
T2
L1: Premier Magnetics #TSD-734
L2: 33µH, 10A DC
T1: Premier Magnetics #TSD-736
T2: Premier Magnetics #TSD-735
Premier Magnetics: [phone]
2.37kΩ
1.5kΩ
MOC
8102
MBR2545CT
R23
R8
D11
PRODUCT SPECIFICATION
10kΩ
LM431
10kΩ
C31
1nF
R26
1800µF
33µH
C21
L2
REV. 1.0.1 6/27/01
750kΩ
100nF
82nF
C23
R11
4.7µF
C22
C8
220Ω
R18
9W
C24
1µF
1.2kΩ
R24
8.2nF
C9
2.26kΩ
8.66kΩ
R25
R22
12VDC
RTN