Panasonic DC-GH5M Series Service Manual page 91

PW UNREG
CH1 1.22V
PW UNREG SYS
VREGA
(From IC1001-29)
SHT UNREG
PW HDMI5V
IC2001
(VENUS ENGINE)
BA37
BG37
A7
B20
E3
(PW DRAM1.2V A)
N3
D12
(PW DRAM1.2V)
T4
PW D1.8V
N1
T2
BC35
(PW DRAM1.8V)
BE35
IC6402
(SYSTEM IC)
E11
(BACKUP CTL1)
K9
D10
(SHT6R5V CTL)
BK26
(BG POW ON)
AD6
IC1903
(REGULATOR)
1 5
VIN VOUT
2 VSS
CE NC 4
3
IC2506
(LOAD SW)
1 VOUT VIN PW D1.2V
4
2 GND CE 3
IC2503
(REGULATOR)
1 VOUT VCC 4 PW EVER 3V
2 GND CE 3
IC2504
(LOAD SW)
4 VOUT GND 1
3 VIN CE 2
IC2502
(REGULATOR)
4 PW EVER 3V
1 VOUT VCC
2 GND CE 3
(BACKUP CTL4)
BACKUP CTL4 K11
QR2501
(BACKUP CTL3)
BACKUP CTL3 J9
BACKUP CTL1
(POWER CTL SW)
POWERCTLSW L9
IC1901
(DC/DC CONTROLLER)
EN
28
SOFT-START
SLEW
21
V
REFIN
+
DISCHARGE
PHASE
COMPENSATION
VREF
REFERENCE
26 REFERENCE
DETECTION
GSNS
23
REFIN
25
REFIN2
24
LP# ULQ
2
CONTROL
OCL
TRIP TRIP
REFERENCE
20
DETECTION
VOLTAGE
V5
18
IC1951
(DC/DC CONTROLLER)
EN
28
SOFT-START
SLEW
21
V
REFIN
+
DISCHARGE
PHASE
COMPENSATION
VREF
REFERENCE
26 REFERENCE
DETECTION
GSNS
23
REFIN
25
REFIN2
24
LP# ULQ
2
CONTROL
OCL
TRIP TRIP
REFERENCE
20
DETECTION
VOLTAGE
V5
18
IC1801
5
(REGULATOR)
Q1801
1 RC VDD 10
2 SS BP 9
4
3 DIS/EN GDRV 8
4 COMP ISNS 7
QR1801
5 FB GND 6
Q1803
VSNS
CONTROL
MODE
MODE
CONTROL LOGIC
.
ON-TIME
ON/OFF TIME
. SELECTION
MINIMUM ON/OFF
. BST
PWM
SKIP/FCCM
.
+
OCL/OVP/UVP VIN
.
DISCHARGE
VIN
VIN
SW
SW
SW
SW
XCON
T
ON
ONE-
SHOT
OC
+
PGND
PGND
NOC
+ 5-V UVLO
PGND
+
PGND
V5OK
+
PGND
ZC
4.4 V/4.0 V
GND
VSNS
CONTROL
MODE
MODE
CONTROL LOGIC
.
ON-TIME
ON/OFF TIME
. SELECTION
MINIMUM ON/OFF
. BST
PWM
SKIP/FCCM
.
+
OCL/OVP/UVP VIN
.
DISCHARGE
VIN
VIN
SW
SW
SW
SW
XCON
T
ON
ONE-
SHOT
OC
+
PGND
PGND
NOC
+ 5-V UVLO
PGND
+
PGND
V5OK
+
PGND
ZC
4.4 V/4.0 V
GND
6 7 8
3 2 1
IC1881
(REGULATOR)
4
VIN VOUT 1
3 EN VSS 2
22
3
5 PW D1.0V A
15
16
CD1901 PW D1.0V B
17
6 PW D1.0V
7
8
9
10
11
12
13
14
19
22
3
5
15
16
CD1951
17
6 PW D0.9V
7
8
9
10
11
12
13
14
19
CD1802
PW SHT6.5V
CD1881
PW BG D3.6V
DC-GH5 POWER(3) BLOCK DIAGRAM