Skyworth RGB R&D Centre
Technical Document
28/35
Page8 Back light
TP0B3
R2B1
10Ω
R2B9
1KΩ
Q0B1
AOD256
G
1
D
2
S
3
+
C0B3
47uF
R3B5
3Ω
R1B7
470mΩ
R2B3
56KΩ
R3B4
3Ω
R3B3
2.43Ω
L0B1
100uH
1
2
BL_EN_O
C0B9
100nF
R2B2
1KΩ
R1B1
10KΩ
R1B2
30KΩ
+
C1B9
47uF
R2B0
10KΩ
C2B3
100nF
R1B3
10KΩ
TP0B8
R0B5
200KΩ
R3B1
56KΩ
C1B8
1uF
BL_ADJ_O
BL_EN_O
C1B2
1uF
TP0B4
LED+
C0B8
100nF
C0B4
100nF
C1B3
220pF
R3B9
10KΩ
Z0B2
5.1V
TP0B2
D0B1
MBRS10150
1
2
3
CN0B1
CN-M
1
2
3
4
5
6
7
8
TP0B5
R2B4
24KΩ
R1B6
470mΩ
C1B0
1uF
R1B9
470mΩ
C2B0
1nF
TP1B0
C0B7
100nF
R3B2
100KΩ
R2B5
0Ω
TP0B6
C1B7
1nF
C1B5
10nF
R3B6
3Ω
R0B8
68Ω
R0B9
68Ω
R0B7
68Ω
C1B1
1nF
C0B5
4.7nF
R2B7
10KΩ
TP1B2
R3B8
2MΩ
TP0B7
C0B6
220pF
R2B8
10KΩ
D0B2
1N4148W
R1B4
470Ω
C1B6
100nF
U0B1
0Z9902DGN-A-0-TR
UVLS
1
VCC
2
ENA
3
VREF
4
RT
5
PWM
6
ADIM
7
TIMER
8
SSTCMP
9
ISEN
10
PROT
11
ISW
12
OVP
13
GND
14
DRV
15
FAULT
16
Q0B2
MMBT4401
1
2
3
R2B6
1MΩ
R1B0
6.8Ω
R1B5
470Ω
R3B0
56KΩ
LED-
R1B8
470mΩ
R0B1
10Ω
C1B4
1nF
R3B7
100KΩ
R0B4
470KΩ
R0B6
470KΩ
+
C0B1
22uF
Z0B1
15V
C0B2
470pF
LED+
LED-
REG5X
+24V_Normal
OVP
OVP
REG5X
LED-
LED+
+12V_PWR
BL_ON/OFF
BL_ADJUST
REG5X
故障实验保护电路,
SSTCP
正常工作
2V
,
故障时
5V
,请注意分压后必须保证正常工
作是比
OVP
低,故障时又需要保证其分压
比
OVP
点电压高,同时
AC
开机时输出电压
还未建立此时也不能导通。
设计时请特别注意!!!
OVP=2.85V~3V~3.15V
VIN=8V~16V
VDIM>1.5V I
(
mA
)
=302/R
(欧姆)
VDIM<0.5V I
(
mA
)
=105/R
欧姆
0.5V<VDIM<1.5V I
(
mA
)
=VDIM
(
mV
)
/5R
欧姆
VSENSE=440mV~500mV~560mV
UVLO=2.85V~3V~3.15V
VIN=4.78V~4.95V~5.12V
调光控制引脚,
PWM
调光时
波形不干净,需要增加电容
1nF~100nF
。
BL_ADJ_O
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