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LP8553 数据表(PDF) 10 Page - Texas Instruments

部件名 LP8553
功能描述  LP8553 High-Efficiency LED Backlight Driver for Notebooks
PDF  41 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

LP8553 数据表(HTML) 10 Page - Texas Instruments

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0 10 20 30 40 50 60 70 80 90 100
0
100
200
300
400
500
PWM INPUT (%)
PWM
PWM AND CURR 25% MODE
PWM AND CURR 50% MODE
0
10 20 30 40 50 60 70 80 90 100
-5
0
5
10
15
20
25
30
35
PWM INPUT (%)
25% MODE
50% MODE
0 10 20 30 40 50 60 70 80 90 100
60
70
80
90
100
110
120
130
140
PWM INPUT (%)
15 inch panel, 23 mA current
PWM AND CURR 25% MODE
PWM AND CURR 50% MODE
PWM
0
100
200
300
400
500
0
1
2
3
4
5
6
LUMINANCE (Nits)
PWM
PWM AND CURRENT 25% MODE
PWM AND CURRENT 50% MODE
15 inch panel, 23 mA current
LP8553
SNVS701B – SEPTEMBER 2011 – REVISED JANUARY 2014
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified: VBATT = 12.0V, CVLDO = 1 μF, L1 = 33 μH, CIN = 10 μF, COUT = 10 μF
Typical Waveforms, fLED = 9.6 kHz
Boost Line Transient Response
Figure 9.
Figure 10.
Input Power
vs.
Optical Efficiency with 15" panel
Luminance
Figure 11.
Figure 12.
Luminance
vs.
Power saved with PWM & current mode compared to PWM
PWM Input
mode
Figure 13.
Figure 14.
10
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Copyright © 2011–2014, Texas Instruments Incorporated
Product Folder Links: LP8553



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