LP5569RTWR Texas Instruments MCU

LP5569RTWR Overview

The LP5569 device is a programmable, easy-to-use 9-channel I2CLED driver designed to produce lighting effects for various applications. The LED driver isequipped with an internal SRAM memory for user-programmed sequences and three programmable LEDengines, which allow operation without processor control. Autonomous operation reduces system powerconsumption when the processor is put in sleep mode.

A high-efficiency charge pump enables the driving of LEDs with highVF, even with 2.5-V input voltage. The LP5569 LED driver maintains goodefficiency over a wide operational voltage range by autonomously selecting the best charge-pumpgain based on LED forward voltage requirements.

The LP5569 device enters power-save mode when LEDs are not active, lowering idle-currentconsumption considerably. A flexible digital interface allows the connection of up to eight LP5569devices with a unique I2C slave address for each device in the samesystem, which supports synchronization of the lighting effects among all devices.

Features

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 MicrocontrollerControl
- Synchronization Among Multiple Devices
- Up to 256Instructions in SRAM Memory for Storing Sequences of Lighting Patterns
- LP5523- and LP55231-Device-Compatible CommandSet
Flexible Dimming Control
- I2C Dimming Control
- PWMDirect-Input Dimming
- PWM Input Frequency: 100-Hz to20-kHz
Adaptive High-Efficiency Charge-Pump Controlfor Driving High-VF LEDs With Low Battery Voltage
MasterFader Control Allows Dimming of Multiple LEDs by Writing to Only One Register to Reduce theI2C Bus Traffic
2-μA Low Standby Current and 10-μAin Automatic Power-Save Mode When LEDs Are Inactive
POR, UVLO, and TSD Protection