Philips 40PFL3088H/12 - Page 43

Circuit Descriptions
EN 43TPN10.1E LA 7.
2013-Oct-18
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7.3 DC/DC Converters
The on-board DC/DC converters deliver the following voltages
(depending on set execution):
• +5V-STANDBY, permanent voltage for the Stand-by
controller, LED/IR receiver and controls.
• +12V, input from the power supply for the panel
common(active mode)
• +12V, input from the power supply for the AMP
• +1V5, from the power supply for the scaler IC NT72567
• +1V1, from the power supply for the scaler IC NT72567
• +1V5, supply voltage for DDR2 ( diagram B03B)
• +3V3, genenal supply voltage
• +3V3-TUN, supply voltage for tuner
• +3V3 from the power supply for the scaler IC NT72567
• +3V3-DVBS, clean voltage for DVB-S2 channel decoder
• +1V2-DVBS, core voltage for DVB-S2 channel decoder
Figures gives a graphical representation of the DC/DC
converters with its current consumptions :
Figure 7-8 DC/DC converters ( for 32" & 39")
19530_205_130807.eps
130807
+12V_PWR RT7257AHZSP
+12V
Soft Start
<230 mA
<1820mA
<370 mA
<210 mA
<170 mA
500 mA
<290 mA
+5V_STB
NT72568
MAIN CHIP
5V_STB
AD82587D
AUDIO AMP
POWER SWITCH
AON4421
Q750
PANEL_VCC_ON/OFF
PANEL
PANEL_T-CON
BUCK CONVERTER
G5173R41D
U701
DV1 1
AON4421
Q701
POWER SWITCH
PWR_ON
+5V_STB
+5V_STB
+5V_STB
+12V
+5V or +12V
+12V
POWER protect
G5250M1T1U
U102
USB multi-media
USB PWR
G1084-33
U101
LDO
ST03CS-2-E
SILICON TUNER
+5V_SW
+5V_TUNER
+5V_SW
LDO
G1084-33TU3Uf
U702
+5V_SW CI CARD
PWR
PCMCIA CARD
VCC_CI
+5V_SW
CI_PWR_EN
MAIN CHIP
NT72568
LDO
AZ1117D
U703
NT72568
MAIN CHIP
DV33
DV33
DV1 5
DDRIII
K4B2G1646E
-BCH9
DV1 5
<10mA
1mA
G1084TU3UF
U705
+5V_SW
LDO
NAND FLASH
K9F1G08U0D
-SIB0
PWR_ON
NT72568
MAIN CHIP
AV2 5
MAIN CHIP
NT72568
LDO
LM1108SF
U704
DV33SB5vAS7805DTR-E1
5V_STB
Depend on panel
Q706
AON4421
AMP STA381BWTR
FB603
FB604
PANEL_VCC
PVDD
12V
12V
5V-STB