VDD

UVLO

POR

OSCILLATOR

IBIAS

BANDGAP

TSD

Single-Wire

Interface

LED

CTRL

GND

Volatile

Program Memory

State Machine

LED CONTROL

Default Sequence

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8

LP5560

SNVS873D – AUGUST 2012 – REVISED JUNE 2016

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Copyright © 2012–2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The LP5560 is a programmable LED driver with a single-wire interface. It is designed to drive a single indicator

LED with different blinking sequences. Up to three pulses with different on and off times can be programmed into

the device. LED current rise and fall times can also be independently controlled. Blinking sequence is stored into

The high-side LED driver has very low headroom voltage requirement and can drive most indicator LEDs directly

from battery voltage. A single CTRL pin is used to control the device on and off and to change settings of the

device. A default blinking sequence is programmed into the LP5560 to enable use of the devices in simply

applications without programming capabilities.

7.2 Functional Block Diagram