Owner manual

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
10μF
16V
C9
22μF
6.3V
C2
0.22μF
L1
6.4μH
C3
10μF
16V
C24
1000pF
C4
10μF
16V
C7
1μF
C10
0.1μF
R9
44.2kΩ
1%
R10
158kΩ
1%
R3
160kΩ
R4
127kΩ
1%
R5
22.1kΩ
1%
R12
10.0kΩ,
1%
R11
6.49kΩ,1%
R6
2kΩ
R1
115kΩ
1%
R2
20kΩ
1%
R7
287kΩ
1%
R8
22.1kΩ
1%
FROM
TCON
CTL
FB2
LX2
5
8
V
L
V
CC
L2
2.6μH
910 27
7
6
1
2
32
11
28
DEL
C11
0.1μF
C12
0.22μF
C25
47pF
C14
220pF
C15
1μF
C28
10pF
C13
100pF
C16
0.1μF
C17
1μF
C21
0.1μF
C20
0.1μF
C18
0.1μF
C19
0.1μF
30
13
12
24
3
18
17 16
D2
C8
0.1μF
C5
10μF
16V
C6
10μF
16V
GND2
FBN
DRVN
SUPPFSEL
DRVP
BST
V
GON
28V/50mA
ON/OFF
D3
VIN
Figure 1. Typical Operating Circuit