Circuit Descriptions
7.
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
+Wi-Fi_VCC, permanent voltage for WIFI.
•
+3V3SB,voltage for IR/LED reciver,Key board
•
+12V, input from the power supply for the panel
common(active mode)
•
+12V, input from the power supply for LNB supply
•
LDO_PWR,DVDD3V3, voltage for EMMC when TV on
•
DDRV, VCCK, voltage for DDR
•
+3V3_TUNER, supply voltage for tuner
•
+5V-USB, input intermediate supply voltage for USB
Power
•
PVDD from the power +12V_AU for the AUDIO AMP
•
+1V2, +3.3VD voltage for Demodulator IC channel decoder
Figures gives a graphical representation of the DC/DC
converters with its current consumptions :
Figure 7-3 DC/DC converters
9
+12V_A/+16V_A
-VLED-2
+12V_A
-VLED2
10
+12V_A/+16V_A
-VLED-2
+12V_A
-VLED2
11
+12V/+16V
+VLED
+12V
n.c.
12
+12V/+16V
+VLED
+12V
+VLED
13
+12V/+16V
-
+12V
-
14
+12V/+16V
-
+12V
-
15
+3.5V/+5V
-
+3.5V
-
16
+3.5V/+5V
-
+3.5V
-
Number
Connector
CN9103
CN8601
CN9101
CN8101
Description
to SSB
to panel
to SSB
to panel
Pin
16
12
16
12
AUDIO - TAS5760LD
EMMC
MT5593
Demodulator IC
U701
1A
TO252
AP1117D33G-13
TUNER_3.3V
TUNER
U705
TU101
U4254
5A
U711
U707
AZ1117H-ADJ
EMMC
1A
SOT-223
1.8V
U503
1A
SOT-23-6
G529A1TB1U
USB *2
HDMI-MHL PWR5V
R4284
5V_USB
AUDIO - TAS5760LD
Audio VCC_12V
3A
For DDR quick start-stand by Mode.
uP1734PSW8
5V_STB
5A
SOP8
+12V
1A
SOT223
DFN8
AT1527F11U
G912T63U
DDR3-4G x5
AZ1084CS2-3.3TRE1
3A
5V_SW
MT5593
5.5A
SOP8
3A
1.2V
5A
TO-263
RT7240GSP
MOS-AON4421
+12V
Demodulator IC
1.05V
12V_AU
MT5593
VCCK(1.0V)
TPS54821RHL
8A
QFN-14
U702
7A
Q702
U708
U710
AVDD3V3/DVDD3V3
1.5V
20170_201.eps