LP5817DRLR中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? Operating voltage range

– VCC range: 2.5V to 5.5V

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

– Output voltage up to 5.5V

? 4 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: ISD = 0.1μA (typ.)

– Standby: ISTB = 22μA (typ.)

– Active:

? INOR = 0.15mA(typ.), when disable output

channel

? INOR = 0.23mA(typ.), LED current = 25.5mA

? Analog dimming (current gain control)

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

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

? Autonomous animation engine control

? 1MHz (max.) I2C interface

? ESD: 4kV HBM, 1.5kV CDM

? Package

– 1.6 x 2.1mm SOT583-8, 0.5mm pitch

– 1.36 x 0.8mm DSBGA-8, 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 LP5814 is a 4-channel RGBW LED driver with

autonomous animation engine control. The device

has ultra-low operation current with 0.1μA (typical) in

shutdown mode, 0.1mA (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.

The autonomous animation engine can significantly

reduce the real-time loading of controller. Each LED

can be configured through the related registers to

realize vivid and fancy lighting effects.