LP5817DRLR中文资料德州仪器数据手册PDF规格书

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

• 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: ISD = 0.1μA (typ.)

– Standby: ISTB = 22μA (typ.)

– Active:

• INOR = 0.15mA (typ.) when disable output

channel

• INOR = 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.) I2C 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.