LP5569ARTWRG4中文资料德州仪器数据手册PDF规格书

1 Features

1• Supply Voltage Range: 2.5 V–5.5 V

• Nine High-Accuracy Current Sinks

– 25.5 mA Maximum per Channel

– 8-Bit Individual Current Control

– 12-Bit 20-kHz Internal Individual PWM Control

Without Audio Noise

• Three Programmable LED Engines

– Independent Illumination Control Without

Active Microcontroller Control

– Synchronization Among Multiple Devices

– Up to 256 Instructions in SRAM Memory for

Storing Sequences of Lighting Patterns

– LP5523- and LP55231-Device-Compatible

Command Set

• Flexible Dimming Control

– I2C Dimming Control

– PWM Direct-Input Dimming

– PWM Input Frequency: 100-Hz to 20-kHz

• Adaptive High-Efficiency Charge-Pump Control for

Driving High-VF LEDs With Low Battery Voltage

• Master Fader Control Allows Dimming of Multiple

LEDs by Writing to Only One Register to Reduce

the I2C Bus Traffic

• 2-μA Low Standby Current and 10-μA in

Automatic Power-Save Mode When LEDs Are

Inactive

• POR, UVLO, and TSD Protection

2 Applications

LED Lighting, Indicator Lights, and Fun Lights for:

• Smart Speaker

• Smart Home Appliance

• Doorbell

• Electric Lock

• Smoke Detector

• Thermostat

• Set-Top Box

• Smart Router

• Bluetooth® Headset

• Cell Phone

3 Description

The LP5569 device is a programmable, easy-to-use

9-channel I2C LED driver designed to produce lighting

effects for various applications. The LED driver is

equipped with an internal SRAM memory for userprogrammed

sequences and three programmable

LED engines, which allow operation without

processor control. Autonomous operation reduces

system power consumption when the processor is put

in sleep mode.

A high-efficiency charge pump enables the driving of

LEDs with high VF, even with 2.5-V input voltage. The

LP5569 LED driver maintains good efficiency over a

wide operational voltage range by autonomously

selecting the best charge-pump gain based on LED

forward voltage requirements.

The LP5569 device enters power-save mode when

LEDs are not active, lowering idle-current

consumption considerably. A flexible digital interface

allows the connection of up to eight LP5569 devices

with a unique I2C slave address for each device in

the same system, which supports synchronization of

the lighting effects among all devices.