Hisense 55U8GQ Service Manual page 65

5
12VS-->12FRC
D
PW R-ON/OFF
4,5,13 PWR-ON/OFF
H :Power on
L :Power off
C
3.3V_Normal-->3.3V FRC
B
FRC-ON/OFF
5 FRC-ON/OFF
A
5
4
12VS 12_FRC
2 3
V2003
C2020
R2013
C2019
AO3401L
100n/25V 20k
2.2u/25V
R2016
20k
V2004
R2012
1
MMBT3904LT1
10k
C2018
100n/25V
180mA
+3.3V_Normal +3.3V_FRC
2 3
V2002
C2024 C2023 AO3401L C2166 C2167
R2018
100n/16V 2.2u/10V 20k 10u/6.3VV 100n/16V
R2017
2.2k
R2019
1
V2001
10k
MMBT3904LT1
R2294
4.7k
4
3
Core Power:12FRC-->0.95V FRC
R2001
+3.3V_FRC
100k
12_FRC
N2001
1
VIN
4
NC
R2002
1M/NC 12 MP8759GD
EN
6
MODE
R2007
10k/NC
R2009
100k
Vin=4.5～26V
Iout=8A
Vref=0.6V
Freq=700KHz R2003
R2=5KΩ～100KΩ
IR2=5uA～30uA 0R
Vout=0.6(1+R1/R2)=0.995V
Vout=0.6*(1+R1/(R2+(R1*R2)/(R4+R9)))
DDR Power:12FRC-->+1.5V_FRC
R2296
22k/NC
R2022
FRC-ON/OFF
C2034 1u/10V
10k
N2003
12_FRC
BOOT
R2024
5
EN
100k/NC
SW
1
VIN
C2028 C2025 C2032
10u/16V 10u/16V
100n/25V
3
GND
MP1658GTF
Vin=4.5～16V
Iout=3A
Vref=0.807V
Freq=600KHz
R2=5KΩ～100KΩ
IR2=5uA～30uA
Vout=0.807(1+R1/R2)=1.51V
3
2
R2004
5340mA
3.3R 1%
C2007
+0.95V_FRC
220n/10V
L2001
7 Idc2 = 7.8A
SW
0.9 uH
R2008
R4 C2008
11 R2010
220p/50V
499k
FB
16.9k
1%
R2005
R9
5 499R
R1
VOUT
1%
R2011
20k
R2006
56k
远端反馈，从IC 底部引线
+0.95V_FRC R2
C2006
100n/25V
R2025
4 640mA
10R
C2027
+1.5V_FRC
2 1u/16V
L2002
2.2 uH
Idc2 = 5.15A
C2026
R2021
6
FB 10p/50V
40.2k
1%
R2023
43k
1%
R2020
46.4k
1%
Title Title Title
Size Size Size Document Number Document Number Document Number
Custom Custom Custom 6M70 SYSTEM POWER 6M70 SYSTEM POWER 6M70 SYSTEM POWER
Date: Date: Date: Thursday, December 06, 2018 Thursday, December 06, 2018 Thursday, December 06, 2018
2
1
D
C
B
A
MSD6886 MSD6886 MSD6886
Rev Rev Rev
v1.0 v1.0 v1.0
Sheet Sheet Sheet 16 16 16 of of of 19 19 19
1