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LP85571 Fiches technique(PDF) 16 Page - Texas Instruments

No de pièce LP85571
Description  LP8557 High-Efficiency LED Backlight Driver For Tablets
PDF  49 Pages
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Fabricant  TI2 [Texas Instruments]
Site Internet  https://www.ti.com
Logo TI2 - Texas Instruments

LP85571 Fiches technique(HTML) 16 Page - Texas Instruments

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VIN
LP8557I
FB
SW
1.1 ” 9OUT / VIN ” 11
L1
D1
VDD
CIN
COUT
LED1
LED2
LED3
LED4
LED5
LED6
GNDs
SCL
SDA
2.7 V ± 5.5 V
7 V ± 28 V
PWM
PWM
VOUT
SDA
SCL
LP8557, LP85571
SNVSA15B – DECEMBER 2013 – REVISED DECEMBER 2015
www.ti.com
Feature Description (continued)
Figure 28. Typical Application Circuit for Devices Configured With BRTMODE = 01, 10, or 11
8.3.2.6 Hybrid PWM & I Dimming Control
Hybrid PWM & I dimming control combines PWM dimming and LED current-dimming control methods. With this
dimming control, better optical efficiency is possible from the LEDs compared to pure PWM control while still
achieving smooth and accurate control and low brightness levels. The switch point from current-to-PWM control
can be set to get the optimal compromise between good matching of the LEDs brightness/white point at low
brightness and good optical efficiency.
16
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Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: LP8557 LP85571



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