Backlight Unit; Led Driver - Samsung LTN173KT02-T01 Service Manual

3.2 BACK-LIGHT UNIT
Item
LED Forward Current
LED Forward Voltage
LED Array Voltage
Power Consumption

3.3 LED Driver

- LED Driver Manufacturer : RICHTEK
Item
Input Voltage
Input Current
Input Power
Operating Frequency
Output PWM
Frequency
Burst Ratio
Output Current
(each LED string)
Output Power
Efficiency
Samsung Secret
Doc.No. LTN173KT02-T01
Symbol Min.
IF -
VF 3.0
VP 30.0
P -
Symbol Min.
Vin 7
I -
Pin -
Fo 0.8
FPWM 0.1
1
D 5
10
Iout 19
Pout -
η
-
Rev.No
Typ. Max.
27 -
- 3.4
- 34.0
- 4.5
Typ. Max.
- 21
- 80
- 1.923
1 1.2
- 10
-
- 100
-
20 21
2.64 2.77
80 -
04-A01-G-120208
Approval
Ta= 25  2 C
Unit Note
mA
V IF=27mA
VF X 10 LEDs
V
(IF=27mA)
IF X VF X 40 LEDs
W (w/o Converter)
(IF=27mA)
Ta= 25  2 C
Unit Note
V
mA
W
Pin = Vin x I
MHz
KHz
PWM freq :
100Hz~300Hz
PWM freq :
%
300Hz~1KHz
PWM freq :
1KHz~30KHz
Vin=7.5~21V,
BLIM=100%
mA
ALC=0V,
ISET=4.75KΩ
BLIM=100%
W
Pout=IoutX3.3X40ea
% BLIM=100%
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