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EN 30
7.
TPN16.1HE LA
7.3
DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
•
PVDD from the power +12V_AU for the AUDIO AMP.
•
DRAM1V5 voltage for IC .NT726660 DDR when TV on
•
+12V, input from the power supply for the panel
common(active mode)
•
+5V_SW, input intermediate supply voltage for USB
Power/HDMI/CI
AUDIO_12V
1.7A(rms)
PWR_12V
PWR_12V
U702
580mA
G5309QN1U(10A)
PWR_12V
2.2A
2016-Aug-19
Circuit Descriptions
Connector
Number
CN9101
CN8601
Description
to SSB
to panel
Pin
16
6
3
PS_ON
n.c.
4
n.c.
n.c.
5
GND
LED-
6
GND
LED-
7
GND
-
8
GND
-
9
+12VA
-
10
+12VA
-
11
+12V
-
12
+12V
-
13
+12V
-
14
+12V
-
15
+5.2v
-
16
+5.2v
-
CLASS D AMP
U601
8W*2@6ohm speaker_1.33A(rms)
AD87588
PWR_ON_2
BUCK CONVERTER
CORE0V9
666_6300mA
BUCK CONVERTER
LDO
U707
U706
+5V_STB
STBC3V3
AP2125N
TPS54528(5A)
16mA
(300mA)
DRAM1V5_EN
BUCK CONVERTER
U709
DRAM1V5
940 mA
2500 mA
RT8079ZQW(3A)
PWR_ON_2
MOS
+5V_SW
Q701
3.3A
AON4421(6A)
PANEL_VCC_ON/OFF
FB751
MOS
Q701
AON4421(6A)
FB750
LNB_EN
LNB
PWR_12V
U202
880mA
MP8124(500mA)
Figure 7-3 DC/DC converters
CN9101
CN8602
to SSB
to panel
16
6
PS_ON
n.c.
PS_ON
n.c.
GND
LED-
GND
LED-
GND
-
GND
-
+12V_A
-
+12V_A
-
+12V
-
+12V
-
+12V
-
+12V
-
+5v
-
+5v
-
•
MAIN3V3,MAIN2V5 voltage for 78822
•
STB3V3, for IR/Key board /IC NT72666
•
Core0V9, for NT72666 core power
•
+3V3_TUNER, supply voltage for tuner
•
1.2V_T2, +3.3VA_T2 voltage for Demodulator IC channel
Figures gives a graphical representation of the DC/DC
converters with its current consumptions :
666_15 mA
666_900mA
DDR3 X 4
MIN@ IDD6 =14mA*4 = 56mA
MAX@ IDD7 =400mA*4 =1.6A
666_465 mA
78822_30mA
BUCK CONVERTER
MAIN3V3
U705
U204
640 mA
800 mA
SY8088(1A)
AZ1117(1A)
BUCK CONVERTER
U703
MAIN2V5
666_600 mA
375 mA
SY8088(1A)
LDO
T tuner_228 mA
U203
+3V3_TUNER
228 mA
S tuner_145 mA
AZ1117(1.35A)
back to
div.table
CN9101
CN8603
to SSB
to panel
16
12
PS_ON/OFF
VLED-
A3D
VLED-
GND
VLED-
GND
n.c.
GND
n.c.
GND
VLED-
+12V_A
VLED-
+12V_A
VLED-
+12V
n.c.
+12V
+VLED
+12V
-
+12V
-
NC
-
FLAG
-
+1.2V_T2
78822_300mA
CI_VCC_EN
POWER SWITCH
+5V_SW
U102
500 mA
G5250(?A)
USB0_EN
POWER SWITCH
+5V_SW
U411
500 mA
G5250(?A)
USB30_EN
POWER SWITCH
+5V_SW
U412
1A
G529(1.2A)
MHL_CD_SENSE
POWER SWITCH
+5V_SW
U515
1A
G529(1.2A)
VCC_CI
500 mA
+5V_USB20
500 mA
+5V_USB30
1A
HDMIA
1A
20140_202.eps
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