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LP5018 Datenblatt(PDF) 12 Page - Texas Instruments

Teilenummer LP5018
Bauteilbeschribung  LP50xx 18-, 24-Channel, 12-Bit, PWM Ultralow-Quiescent-Current, I2C RGB LED Drivers
PDF  59 Pages
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Hersteller  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LP5018 Datenblatt(HTML) 12 Page - Texas Instruments

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7 Detailed Description
7.1 Overview
The LP50xx device is an 18- or 24-channel constant-current-sink LED driver. The LP50xx device includes all
necessary power rails, an on-chip oscillator, and a two-wire serial I2C interface. The maximum constant-current
value of all channels is set by a single external resistor. Two hardware address pins allow up to four devices
on the same bus. An automatic power-saving mode is implemented to keep the total current consumption under
10µA, which makes the LP50xx device a potential choice for battery-powered end-equipment.
The LP50xx device is optimized for RGB LEDs regarding to both live effects and software efforts. The LP50xx
device controls each LED output with 12-bit PWM resolution at 29kHz switching frequency, which helps achieve
a smooth dimming effect and eliminates audible noise. The independent color-mixing and intensity-control
registers make the software coding straightforward. When targeting a fade-in, fade-out type breathing effect, the
global RGB bank control reduces the microcontroller loading significantly. The LP50xx device also implements a
PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.
7.2 Functional Block Diagram
OUT0
VLED
12 Bits
29 kHz
PWM
Generators
VCC
Bandgap
IREF Setting Current
Digital
Interface
V1P8
LDO
Digital Control
Oscillator
15MHz
Thermal Shutdown
OUT1
OUT2
OUT21
OUT22
OUT23
GND
VCC
VCAP
EN
SDA
SCL
ADDR0
ADDR1
IREF
LP5018, LP5024
SLVSEB8C – OCTOBER 2018 – REVISED JULY 2024
www.ti.com
12
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Product Folder Links: LP5018 LP5024



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