ML4827CP-1 Micro Linear, ML4827CP-1 Datasheet - Page 14

• Manufacturer Part Number: ML4827CP-1
• Description: Fault-Protected PFC and PWM Controller Combo
• Manufacturer: Micro Linear

ML4827
LEADING/TRAILING MOD.
such 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
300m
BR1
1W
85 TO 265VAC
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
D12
D13
C19
1µF
3.15A
357k
357k
F1
R2A
R2B
75k
13k
499k
499k
R3
R4
R1A
R1B
10nF
C11
330µF
39k
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
27k
R12
IRF840
3.1mH
Q1
L1
ML4827-1
220pF
R21
22
C7
41.2k
PWM OUT
(Continued)
DC I LIMIT
180
PFC OUT
R6
R28
"FRED" Diode
8A, 600V,
1nF
VEAO
C6
V REF
GND
10µF
V CC
C12
V FB
10nF
D1
C4
16
15
14
13
12
11
10
9
6.2k
R10
BYV26C
D3
178k
178k
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
Application Note 33.
R15
3
100nF
C20
1µF
C25
33
R14
220
T1
R19
10nF
C15
1N5818
4.7k
33
R17
D10
R30
IRF830
C16
1µF
Q3
IRF830
Q2
1.1
R20
15V
D7
BYV26C
100nF
C13
D6
C14
BYV26C
1µF
D5
T2
L1: Premier Magnetics #TSD-734
L2: 33µH, 10A DC
T1: Premier Magnetics #TSD-736
T2: Premier Magnetics #TSD-735
Premier Magnetics: [phone]
2.37k
1.5k
MOC
8102
R23
MBR2545CT
R8
D11
10k
TL431
10k
C31
R26
1nF
1800µF
33µH
C21
L2
750k
100nF
82nF
C23
R11
4.7µF
C8
C22
220
R18
9W
C24
1µF
1.2k
R24
8.2nF
C9
2.26k
8.66k
R25
R22
12VDC
RTN