LP5562 datasheet(10/52 Pages) TI2

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PROGRAM

MEMORY

LP5562

SCL

SDA

CLK_32K

ADDR_SEL0

ADDR_SEL1

EN/VCC

VDD

GND

IDAC

Control

BIAS

REF

TSD

POR

OSC

CLK

DET

VDD_ IO

Command Based

PWM Pattern Generator

1PF

CIN

VDD

MCU

LP5562

SNVS820B – APRIL 2013 – REVISED DECEMBER 2016

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7 Detailed Description

7.1 Overview

The LP5562 is a RGBW LED driver for indicator LED and keypad lighting. The device has an internal program

memory for creating a variety of lighting sequences. When the program memory has been loaded, the LP5562

can operate independently without processor control.

The device has 4 LED drivers that are constant current sinks with 8-bit current and 8-bit PWM control. The

current sinks can be controlled via the three execution engines or direct PWM control. The execution engines

have five different functions used to build lighting sequences: Ramp, Set PWM, Go to Start, Branch, or End

Trigger. These control methods and functions are explained in detail in Feature Description and Device

Functional Modes.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 LED Drivers Operational Description

The LP5562 has 4 LED drivers that are constant current sinks with 8-bit current and 8-bit PWM control. Current

is controlled from I2C registers. PWM can be controlled with program execution engines or direct I2C register

writes.

7.3.1.1 LED Driver Current Control

LED driver output current can be programmed with I2C register from 0 mA up to 25.5 mA. Current setting

resolution is 100 μA (8-bit control).

LP5562 Datasheet(PDF) 10 Page - Texas Instruments

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