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5. Circuit instruction
5.1 Power assign and block diagram
Power assign:
The Power only has +12V_IN output
，
other voltages are converted from +12V_IN.
a.
5Vstb is converted by N19 from +12V_IN
，
5VAIN and 5V_USB are converted by N43 from 5Vstb.
b.
3.3Vstb and 3.3V_mcu as standby power supply for standby mode.
c.
3.3V_Normal supply power for N5 and Main IC N46 is converted by N3 from 5VAIN; 2.5V_Normal supply
power for N46 is converted by N13 from 5VAIN; VDDC(1.28V) supply power for main IC(core voltage) is
converted by N1 from 5VAIN;1.8VA supply power for N41(DDR),N45(DDR) is converted by N15 from
5VAIN.
e VCC_A supply power for N17(audio amplifier) is converted by N42 from +12V_IN; 5V_Tuner supply
power for Tuner is converted by N16 from +12V; 5V_USB supply power for USB interface.
f VCC-Panel supply power for Panel is converted by N14 from +12V_IN
Block diagram:
(N41,N45)
(L46)
(N46)
AO4459(N14)
VCC-Panel
(N13)
(N3)
(N15)
FOR STANDBY
FOR STANDBY
MP1482(N1)
5VAIN
+12V
STPB2012
3.3Vstb
LD1117-3.3
VDDC
AZ1084S-ADJ
AP1084D-3.3
5V_USB
LD1117A-2.5
2.5V_Normal
1.8VA
3.3V_Normal
1100mA
380mA
500mA
NB637
1000mA
200mA
5V_Tuner
78D05(N16)
Panel
TAS5707(N17)
N19
(N46)
M SD309PX
5VAIN
FH2610(U42)
STPB2012(L10)
VCC_A
(N2)
N42
(SH2)
IRF7314
5Vstb
IRF7314(N43)
(N46,N5)
3.3V_mcu
+12V_IN
