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LP8556 датащи(PDF) 12 Page - Texas Instruments

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номер детали LP8556
подробное описание детали  High-Efficiency LED Backlight Driver for Tablets
PDF  52 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LP8556 датащи(HTML) 12 Page - Texas Instruments

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VSW
20V/DIV
IL
500 mA/DIV
IOUT
100 mA/DIV
VBOOSTac
200 mV/DIV
1 Ps/DIV
EN/VDDIO
2V/DIV
VSW
20V/DIV
VBOOST
20V/DIV
4 ms/DIV
0
100
200
300
400
500
0
1
2
3
4
5
LUMINANCE [Nits]
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
20
40
60
80
100
BRIGHTNESS [%]
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
LP8556
SNVS871B – JULY 2012 – REVISED SEPTEMBER 2012
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified: VIN = 3.8V, CVLDO = 10 μF, L1 = 4.7 μH, CIN = 2.2 μF, COUT = 4.7 μF, fSW = 1.25 MHz
Power Savings with Adaptive Dimming When Compared to
Input Power as a Function of Brightness
PWM Dimming
Figure 12.
Figure 13.
Steady State Operation Waveforms
Start-up Waveforms
Figure 14.
Figure 15.
12
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: LP8556



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