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LP8556 数据表(PDF) 49 Page - Texas Instruments

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部件名 LP8556
功能描述  High-Efficiency LED Backlight Driver for Tablets
PDF  63 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LP8556 数据表(HTML) 49 Page - Texas Instruments

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background image
0
20
40
60
80
100
100
120
140
160
180
200
BRIGHTNESS [%]
PWM Dimming
Adaptive Dimming
VIN = 3.6V
10" Panel
6x7 LED Array
ILEDMAX = 23 mA/CH
L = 4.7 PH
1.5 mm Max Height
fSW = 1.25 MHz
0
20
40
60
80
100
0
100
200
300
400
500
BRIGHTNESS [%]
PWM Dimming
Adaptive Dimming
VIN = 3.6V
10" Panel
6x7 LED Array
ILEDMAX = 23 mA/CH
L = 4.7 PH
1.5 mm Max Height
fSW = 1.25 MHz
0
20
40
60
80
100
45
55
65
75
85
95
BRIGHTNESS [%]
LED Efficiency
Boost Efficiency
VIN = 8.6V
6x7 LED Array
ILEDMAX = 20 mA/CH
L = 10 PH
1.5 mm Max Height
fSW = 625 kHz
0
20
40
60
80
100
45
55
65
75
85
95
BRIGHTNESS [%]
LED Efficiency
Boost Efficiency
VIN = 12.9V
6x7 LED Array
ILEDMAX = 20 mA/CH
L = 10 PH
1.5 mm Max Height
fSW = 625 kHz
0
20
40
60
80
100
45
55
65
75
85
95
BRIGHTNESS [%]
LED Efficiency
Boost Efficiency
VIN = 3.8V
6x7 LED Array
ILEDMAX = 20 mA/CH
L = 10 PH
1.5 mm Max Height
fSW = 625 kHz
0
20
40
60
80
100
45
55
65
75
85
95
BRIGHTNESS [%]
LED Efficiency
Boost Efficiency
VIN = 6.3V
6x7 LED Array
ILEDMAX = 20 mA/CH
L = 10 PH
1.5 mm Max Height
fSW = 625 kHz
49
LP8556
www.ti.com
SNVS871I – JULY 2012 – REVISED MARCH 2016
Product Folder Links: LP8556
Submit Documentation Feedback
Copyright © 2012–2016, Texas Instruments Incorporated
9.2.3 Application Curves
Unless otherwise specified: VIN = 3.8 V, CVLDO = 10 μF, L1 = 4.7 μH, CIN = 2.2 μF, COUT = 4.7 μF, ƒSW = 1.25 MHz
Figure 20. Boost and LED Drive Efficiency
Figure 21. Boost and LED Drive Efficiency
Figure 22. Boost and LED Drive Efficiency
Figure 23. Boost and LED Drive Efficiency
Figure 24. Optical Efficiency
Figure 25. Luminance as a Function of Brightness



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