LP85571 datasheet(16/49 Pages) TI2

Nome de Peças	LP85571

Descrição Electrónicos	LP8557 High-Efficiency LED Backlight Driver For Tablets

PDF	49 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI2 [Texas Instruments]

Página de início	https://www.ti.com

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16 / 49 page

VIN

LP8557I

1.1 ” 9OUT / VIN ” 11

VDD

CIN

COUT

LED1

LED2

LED3

LED4

LED5

LED6

GNDs

SCL

SDA

2.7 V ± 5.5 V

7 V ± 28 V

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.

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