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12V TO 5VAIN CIRCUIT
12V
Z12V
T
R004
C005
R001
0.1U
10R
100K
MP1495
C043
C001
C002
BST
GND
5
4
L001
10U
10U
0.1U
6.8UH
EN/SYNC
SW
6
3
C049
R027
VCC
IN
7
2
R003
FB
AAM
8
1
22R
470P
C003
R002
82K
NC
NC
GND
82K
U001
0.1U
C004
GND
R010
C006
0.1U
0R
15P
R005
C048
10K
1000P
R006
R007
33K
39K
R009
R008
330R
6K8
GND
VCC=0.8(1+R007/(R008+R009))=5.18V
POWER & BACKLIGHT CONTROL
+3V3STB
R021
1K
PWR-ON/OFF
P_ON/OFF
R022
100R
HI=>PS POWER ON
C028
LO=>PS POWER OFF
0.01U
NC
GND
5VAIN
R023
NC
1K
R024
VBL_CTRL
BL_ON
1K
R025
10K
C029
NC
0.01U
GND
GND
BACKLIGHT DIMMING ADJUST
DIM_PWM
BRI_ADJ-PWM0
R026
4K7
C030
22P
GND
5VSTB
Z5VSTB
T
5VSTB
5VSTB
P_ON/OFF
R011
C007
4.7K
C008
C009
220U
10U
0.1U
10V
R014
3.3K
GND
STANDBY POWER SUPPLY
5VSTB
C019
C018
10U
0.1U
GND
PANEL POWER SUPPLY
12V
5VAIN
R035
0R
R034
0R
NC
+3V3STB
R028
10K
NC
R030
PANEL_ON/OFF
4K7
HI=>LVDS POWER ON
R029
LO=>LVDS POWER OFF
3.3K
GND
SWITCH POWER
Z5VAIN
T
Q002
5VAIN
PMV65XP
R012
33K
C
Q001
B
BT3904
C011
E
0.1U
C010
R013
0.1U
2K7
GND
U003
Z3V3STB
AS1117-3.3
T
VIN
3
+3V3STB
OUT
4
2
4
GND/ADJ
1
C020
C021
C022
22U
10U
0.1U
GND
GND
For silicon Tuner Supply
VCC-PANEL
VCC-PANEL
T
Q004
PMV65XP
5VAIN
R032
33K
C
Q003
B
C041
BT3904
E
0.1U
C042
0.1U
R031
2K7
CORE POWER
+1V2-VDDC
T
+1V2_VDDC
L002
680mA
5VSTB
1UH
U002
MP2143
C015
C016
C017
R016
22U
22U
10U
PGND
OUT
4
5
150K
SW
AGND
3
6
(Vin=2.5V-5.5V)
VIN
FB
2
7
Vref=0.6V
PG
EN
Min 1.16V/ Max 1.24V
1
8
C012
C013
GND
R017
10U
0.1U
R015
0R
510K
GND
For timing sequence
C014
0.1U
Fixed Fsw=1.2MHZ
R018
Fixed OCP=4.2A
150K
If Vout=1V Set R016=150K R017=4.7K R018=220K
If Vout=1.2V Set R016=150K R017=0R R018=150K
GND
If Vout=1.5V Set R016=150K R017=8.2K R018=91K
If Vout=1.8V Set R016=150K R017=6.2K R018=68K
VCC=0.6(1+R016/(R018+R017))=1.2V
DDR POWER
AS1117AD
AVDD-DDR-1V8
T
U004
AVDD_DDR_1V8
5VAIN
T
173mA
5VAIN
R019
270R
C025
C024
C026
C027
0.1U
C023
0.1U
22U
10U
10U
R020
120R
GND
FOR DEMOD IC SUPPLY
ZTUNER-3V3
T
TUNER-3V3
300mA
U006
AS1117-3.3
5VAIN
C031
C033
C034
C035
0.1U
C032
0.1U
22U
10U
10U
GND
MS306*PB
SYSTEM POWER(2/8)
@max3A
VCC3V3
ZVCC3V3
T
U005
AS1117-3.3
C036
C038
C039
C040
0.1U
C037
0.1U
10U
22U
10U
GND
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