DC-GH5 POWER(4) BLOCK DIAGRAM
IC6402
(SYSTEM IC)
IC2001
(VENUS ENGINE)
PW UNREG
PW D3.5V
(BIS POWER ON)
IC1851
(SYNCHRONOUS STEP-DOWN CONVERTER)
6
5
SW
SW
SW
UGATE
LGATE
VIN
VIN
VIN
FB
EN
RIPPLE
GEN.
EN
VBIAS
REGULATOR
ON-TIME
GND
DRIVER
CONTROL
MIN OFF
UV & OV
2
1
BOOT
PVCC
PVCC
PVCC
GND
VREF
COMPARATOR
+
--
OC
3
4
SW
CD1704
CD1705
CD1851
HS LIM.
ERROR
AMP.
DCS-CONTROL
TM
COMP.
IC1701
(STEP DOWN CONVERTER)
2
15
16
12
SW
PVIN
FSW
GATE
DRIVE
POWER
CONTROL
CONTROL
LOGIC
13
PGND
PGND
SOFT
START
UVLO
THERMAL
SHUTDOWN
TIMER T
ON
DIRECT CONTROL
& CONPENSATION
PG ONTROL
7
VOS
14
FB
5
11
PVIN
AVIN
EN
9
SS/TR
8
DEF
LS LIM.
COMP.
1
SW
3
SW
COMP.
15
16
PGND
AGND
PGND
4
PG
+
-
10
6
HS LIM.
ERROR
AMP.
DCS-CONTROL
TM
COMP.
IC1852
(STEP DOWN CONVERTER)
2
15
16
12
SW
PVIN
FSW
GATE
DRIVE
POWER
CONTROL
CONTROL
LOGIC
13
PGND
PGND
SOFT
START
UVLO
THERMAL
SHUTDOWN
TIMER T
ON
DIRECT CONTROL
& CONPENSATION
PG ONTROL
7
VOS
14
FB
5
11
PVIN
AVIN
EN
9
SS/TR
8
DEF
LS LIM.
COMP.
1
SW
3
SW
COMP.
15
16
PGND
AGND
PGND
4
PG
+
-
10
6
IC1853
(REGULATOR)
3
4
5
2
1
VSS
VIN VOUT
CE
NC
AY4
PW BIS5.2V
IP1002
(BACKUP CTL2)
BACKUP CTL2
L11
PIOB6
PW WIFI3.5V
CD1853
PW SD3.15V
CD1852
PW WIFI1.8V
PW D3.15V
IC3502
(REGULATOR)
3
2
4
6
1
VOUT
CE
VOUT
VIN
VSS
5 VIN
IC3503
(REGULATOR)
2
3
4
1
VOUT
VSS
VIN
CE
(IS PWR ON4)
PW D3.3V 1
PW D3.3V 2
D10
PW D3.15V
PW UNREG SYS
QR4001
IC4002
(DC/DC CONVERTER)
4
Q
S
R
CURRENT
SENSE
THERMAL
SHUTDOWN
CURRENT
LIMIT
OVP
UVLO
OSC
SOFT-START
CE
DRIVER
CONTROL
ERR.
AMP
PWM
COMP.
VOUT
GND
FB
LX
VCC
ENB
3
2
5
6
SLOPE
COM-
PENSATION
1
1
2
3
4
6
5
Q4001
(EVF POWER2)
VREF
QR4002
6
5
4
3
1
2
PW D3.15V
PIOC2
D9
(STB PWR ON)
(EVF POWER1)
PIOC1 C10
CD4010
CD4008
CD4006
EVF POWER 10V
CD4001
CD4009
PW EXTSTB5.2V
CL8627
1
2
3
4
6
5
Q8620
QR8623
IC8611
(LOAD SWITCH)
VOUT
VOUT
VIN
CURRENT
LIMIT
THERMAL
SHUT
DOWN
SLEW RATE
CONTROL
DRIVER
OUTPUT
DISCHARGE
CONTROL
LOGIC
GND
1
2
5
VIN
CNT
6
4
3
PULL
DOWN
1
2
3
4
6
5
Q8621
5
2
4
3
1
6
OUT
VSS
+IN
-IN
VDD
NC
IC8610
(SINGLE COMPARATOR)
PW D5.2V
PW D5.2V
CL8604
PIOB4
E9
(STB LRG CRNT ON)
PIOB3
E10