Texas Instruments LP5817 Bedienungsanleitung

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LP5817 3-Channel I

2

C Interface RGB LED Driver

1 Features

•Operating voltage range

–V

CC

range: 2.5V to 5.5V

–Logic pins compatible with 1.8V, 3.3V, and 5V

–Output voltage up to 5.5V

•3 constant current sinks with high precision

–0.1mA to 51mA per channel

–Device-to-device error: ±8% (max.)

–Channel-to-channel error: ±3% (max.)

–Ultra-low headroom voltage: 135mV (max.) at

25.5mA; 275mV (max.) at 51mA

•Ultra-low power consumption

–Shutdown: I

SD

= 0.1μA (typ.)

–Standby: I

STB

= 22μA (typ.)

–Active:

•I

NOR

= 0.15mA (typ.) when disable output

channel

•I

NOR

= 0.23mA (typ.) when LED current =

25.5mA

•Analog dimming (current gain control)

–Global 1-bit Maximum Current (MC): 25.5mA or

51mA

–Individual 8-bits Dot Current (DC) setting

•PWM dimming up to audible-noise-free 23kHz

–Individual 8-bits PWM dimming resolution

–Linear or exponential dimming curves

•400kHz (max.) I

2

C interface

•ESD: 4kV HBM, 1.5kV CDM

•Package

–1.6mm*2.1mm SOT583-8 with 0.5mm pitch

–1.36mm*0.8mm DSBGA-8 with 0.35mm pitch

•–40°C to 125°C operating temperature range

2 Applications

LED animation and indication for:

•Personal Electronics

–Virtual Reality (VR) Headset

–Gaming Controller and Peripherals

–Electronic and Robotic Toys

–Smart Speaker

–Wireless Speaker

–Solid State Drive (SSD)

–Electronic Smart Lock

–Headsets/Headphones and Earbuds

–GPS Personal Navigation Device

•WLAN/Wi-Fi Access Point

•Video Doorbell

•Video Conference System

3 Description

The LP5817 is a 3-channel RGB LED driver. The

device has ultra-low operation current with 0.1μA

(typical) in shutdown mode, 0.15mA (typical) when

enable device and 0.2mA (typical) when illuminate

LEDs.

Both analog dimming and PWM dimming methods are

adopted to achieve powerful dimming performance.

The output current of each LED can be adjusted

with 256 steps from 0.1mA to 25.5mA or 0.2mA to

51mA. The 8-bits PWM generator enables smooth

and audible-noise-free dimming control for LED

brightness.

Package Information

PART NUMBERPACKAGEPACKAGE SIZE (NOM)

LP5817DRLRSOT583 (8)1.6mm × 2.1mm

LP5817YCHRDSBGA (8)1.36mm × 0.8mm

2.5 V - 5.5 V

OUT0

OUT1

OUT2

GND

1 uF

VCC

SCL

SDA

NC

MCU

VIO

4.7k



4.7k



VLED

LED0

LED1

LED2

Red LED

Green LED

Blue LED

LP5817 Simplified Schematic

LP5817

SNVSCQ2A – MARCH 2025 – REVISED AUGUST 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen