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LP8553 数据表(PDF) 9 Page - Texas Instruments

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

LP8553 数据表(HTML) 9 Page - Texas Instruments

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background image
0
10 20 30 40 50 60 70 80 90 100
0
10
20
30
40
50
RISET (k
)
CURRENT[7:0] = FFh
CURRENT[7:0] = 7Fh
0
50
100
150
200
250
300
80
82
84
86
88
90
92
94
96
98
100
IOUT (mA)
VBOOST = 30V
VBOOST = 35V
VBOOST = 40V
6
8
10
12
14
16
18
20
0
200
400
600
800
1,000
1,200
VBATT (V)
LOAD = 150 mA
VBOOST = 30V
VBOOST = 35V
VBOOST = 40V
0
10 20 30 40 50 60 70 80 90 100
60
65
70
75
80
85
90
95
100
DUTY CYCLE (%)
VIN = 9V
VIN = 12V
0 10 20 30 40 50 60 70 80 90 100
60
65
70
75
80
85
90
95
100
DUTY CYCLE (%)
VIN = 9V
VIN = 12V
LP8553
www.ti.com
SNVS701B – SEPTEMBER 2011 – REVISED JANUARY 2014
Typical Performance Characteristics
Unless otherwise specified: VBATT = 12.0V, CVLDO = 1 μF, L1 = 33 μH, CIN = 10 μF, COUT = 10 μF
LED Drive Efficiency, fLED = 9.6 kHz
LED Drive Efficiency, fLED = 9.6 kHz, L1 = 15 μH
Figure 3.
Figure 4.
Boost Converter Efficiency
Battery Current
Figure 5.
Figure 6.
ILED
vs.
RISET
Typical Waveforms, fLED = 9.6 kHz
Figure 7.
Figure 8.
Copyright © 2011–2014, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Links: LP8553



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