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LP8551TLX/NOPB Datasheet(PDF) 31 Page - Texas Instruments

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Part # LP8551TLX/NOPB
Description  LP8551 High-Efficiency LED Backlight Driver for Notebooks
PDF  47 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP8551TLX/NOPB Datasheet(HTML) 31 Page - Texas Instruments

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LP8551
www.ti.com
SNVS673E – APRIL 2010 – REVISED SEPTEMBER 2014
8.6.2.4 EEPROM Address 2
Address A2h
EEPROM ADDRESS 2 REGISTER
7
6
5
4
3
2
1
0
ADAPTIVE_SPEED[1:0]
ADV_SLOPE
EN_ADAPT
EN_BOOST
BOOST_IMAX
Name
Bit
Access
Description
ADAPTIVE
7
R/W
Boost converter adaptive control speed adjustment
SPEED[1]
0 = Normal mode
1 = Adaptive mode optimized for light loads. Activating this helps the voltage droop with
light loads during boost / backlight start-up.
ADAPTIVE
6
R/W
Boost converter adaptive control speed adjustment
SPEED[0]
0 = Adjust boost once for each phase shift cycle or normal PWM cycle
1 = Adjust boost every 16th phase shift cycle or normal PWM cycle
ADV_SLOPE
5
R/W
Advanced slope
0 = Advanced slope is disabled
1 = Use advanced slope for brightness change to make brightness changes smooth for
eye
EN_ADAPT
3
R/W
Enable boost converter adaptive mode
0 = adaptive mode disabled, boost converter output voltage is set with VBOOST
EEPROM register bits
1 = adaptive mode enabled. Boost converter startup voltage is set with VBOOST
EEPROM register bits, and after startup voltage is reached the boost converter adapts
to the highest LED string VF. LED driver output headroom is set with DRV_HEADR
EEPROM control bits.
EN_BOOST
2
R/W
Enable boost converter
0 = boost is disabled
1 = boost is enabled and turns on automatically when backlight is enabled
BOOST_IMAX
1
R/W
Boost converter inductor maximum current
0 = 1.4 A
1 = 2.5 A (recommended)
Copyright © 2010–2014, Texas Instruments Incorporated
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Product Folder Links: LP8551



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