LP55231 datasheet(10/59 Pages) TI2

Numer części	LP55231

Szczegółowy opis	LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump - WQFN

PDF	59 Pages

Scroll/Zoom	100%

Producent	TI2 [Texas Instruments]

Strona internetowa	https://www.ti.com

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10 / 59 page

CHARGE PUMP

1x/1.5x

0.47 PF

COUT

1 PF

VOUT

C1+

C1-

C2+

C2-

D/A

PROGRAM

MEMORY

50H TO 6FH;

96 INSTRUCTIONS

PWM PATTERN

GENERATOR

PWM PATTERN

GENERATOR

PWM PATTERN

GENERATOR

12-BIT PWM

PATTERN

CONTROL

8 BIT

MAXIMUM

CURRENT

CONTROL

IDAC AND HIGH

SIDE LED

DRIVERS

SCL

SDA

CLK

INT

ASEL1

ASEL0

TRIG

SERIAL

DATA

CTRL

REG

POR

THERMAL

SHUTDOWN

CLK

DET

1.25-MHz

OSCILLATOR

BIAS

VREF

CONTROL

GND

CIN

1 PF

VDD

TEMP

COMP

LP55231

SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016

www.ti.com

Product Folder Links: LP55231

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7 Detailed Description

7.1 Overview

The LP55231 is a fully integrated lighting management unit for producing lighting effects for mobile devices. The

LP55231 includes all necessary power management, high-side current sources, temperature compensation, two-

wire control interface and programmable pattern generators. The overall maximum current for each driver is set

by an 8-bit register.

The LP55231 controls LED luminance with a pulse-width modulation (PWM) scheme with a resolution of 12 bits.

Also, the temperature compensation is done by PWM.

7.2 Functional Block Diagram

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