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ZA1103
ZA1104
A
L1120
F1101
N
1
P1101
VA1110
4
ZA1150
ZA1151
1
2
ZA1105
3
1
2
ZA1106
3
1
2
ZA1107
3
K1129
IC1150
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
7
VIN
UVLO
UVLO
+
+
START-UP
LATCH RELEASE/
-
-
CIRCUIT
OVER VOLTAGE
PROTECTOR/
OVER HEATING
VCC(START)
VCC(STARTUP OFF)
PROTECTOR
/VCC(STOP)
/VCC(STARTUP ON)
IDP(LIMIIT/
BURST)SENS.
Z/C
ZERO CURRENT
1
DET./ONDEAD TIMER
CONTROL
SOFT-DRIVE
CIRCUIT
CIRCUIT
STANDBY
CIRCUIT
OCP THRESHOLD
COMPARATOR/
FB
RESTERT
2
BURST MODE
TIMER
OCP THRESHOLD
COMPARATOR
ON WIDTH
TIMER
GND
3
D1140
L1121
4
C1121
1
2
1
2
3
4
3
3
2
C1122
C1123
R1153
LB1126
R1150
2
4
7
C1150
IC1150
1
3
5
9
R1152
R1151
C1151
D1156
R1157
D1157
R1158
C1153
9
DRAIN
VCC
4
IC1601, IC1701
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
8
7
6
CS
EXT
GND
CONTROL LOGIC
LEVEL
SHIFT
CNT.
COMP
-
+
-
+
V5
UVLOcomp
+
-
VREF
SOURCE
VIN
V5/PWON
VREF/SS
/OCL
5
1
2
3
LB1122
C1125
T1150
P1
12
NC
1
PU
11
2
ZA1270
P2
3
ZA1271
10
D1141
$
NC
9
4
LB1124
V2
8
5
V1
7
NC 6
LB1123
D1151
Q1200
R1208
R1209
4
1
C1202
3
2
$
R1210
IC1200
C
D1152
1
3
R1154
HOT
COLD
1
D
6
D
Q1700
2
D
D
5
3
G
S
4
R1701
1
8
2
7
IC1701
3
6
5
4
5
FB
0.8V
+
-
Important Safety Notice:
Components identified with the mark have
the special characteristics for safety.
When replacing any of these components
CC
use only the same type.
4
D1270
L1400
1
2
3
L1270
C1270
C1272
C1271
R1800
D1800
C1200
R1200
R1207
A
R
C1201
R1201
2
R1205
R1206
1
2
3
4
2
L1701
IP1601
P
1
1
2
3
4
Note:
Marked $ (spare) parts are not assembled
* Optional Parts
TO P1501 MAIN P.C.B.
MAIN NET (1/4) SECTION
P1102
1
NC
X_SW5R8VT
2
X_SW5R8V
3
4
X_SW5R8V
X_SW5R8V
5
X_SW5R8V
6
GND
7
GND
8
GND
9
GND
10
11
GND
12
X_SW12V
13
X_SW12V
14
X_SW12V
15
X_SW12V
16
X_SW3R8V
R1803
X_SW3R8V
17
P_ON_H
18
19
D3R8V
P_SAVE_L
20
21
FANLOCK
22
FAN_GND
QR1801
23
FANOUT
P1103
1
FANLOCK
2
FAN_GND
3
FANOUT
8
7
Q1600
6
5
R1601
L1601
8
7
IC1601
6
5
DMR-EH65EC
DMR-EH65EP
POWER
SCHEMATIC DIAGRAM
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