Rainbow Electronics MAX8728 - Manual (Page 14)

MAX8728
Low-Cost, Multiple-Output
Power Supply for LCD Monitors/TVs
14 ______________________________________________________________________________________
MAX8728
AV DD
13.5V/500mA
GATE
P1
D1
D6
INL
V IN
10.8V TO 13.2V
OUT1
3.3V/2A
V GOFF
-6V/150mA
D5
D4
IN
26
25
23
31
4
22
29
21
20
19
14
15
LX1
OUT1
FB1
EN
SHDN
GND1
GND FBP
GNDP
SRC
REF
GON
DRN
MODE
THR
COMP
C1
10 μF
16V
C9
22 μF
6.3V
C2
0.22 μF
L1
6.4 μH
C3
10
μF
16V
C24
1000pF
C4
10
μF
16V
C7
1 μF
C10
0.1 μF
R9
44.2k Ω
1%
R10
158k Ω
1%
R3
160k Ω
R4
127k Ω
1%
R5
22.1k
Ω
1%
R12
10.0k
Ω,
1%
R11
6.49k Ω,1%
R6
2k Ω
R1
115k
Ω
1%
R2
20k
Ω
1%
R7
287k
Ω
1%
R8
22.1k
Ω
1%
FROM
TCON
CTL
FB2
LX2
5
8
V L V CC
L2
2.6 μH
9 10 27
7
6
1
2
32
11
28
DEL
C11
0.1 μF
C12
0.22 μF
C25
47pF
C14
220pF
C15
1
μF C28
10pF
C13
100pF
C16
0.1 μF
C17
1
μF
C21
0.1
μF
C20
0.1
μF
C18
0.1
μF
C19
0.1
μF
30
13
12
24
3
18
17 16
D2
C8
0.1 μF
C5
10
μF
16V
C6
10
μF
16V
GND2
FBN
DRVN
SUPP FSEL DRVP
BST
V
GON
28V/50mA
ON/OFF
D3
VIN
Figure 1. Typical Operating Circuit