Linear Technology LTC3219 User's Guide Application Note 111

About this manual

The LTC3219 is a 250mA LED driver designed to illuminate nine Universal LEDs (ULEDs). These LEDs can be individually turned on or off, set in general purpose output mode, configured to blink at selected rates, or gradually turn on and off. The device features an external enable pin for control without using the I2C bus.

The guide details how to configure the device using 12 data registers via standard I2C protocol. It provides instructions for setting LED intensity, enabling blinking modes with four different patterns, and controlling gradual transitions (gradation) of LEDs from off to on or vice versa.

What's inside

• Introduction
• I2C Control
• Data Registers
• Device Setup and Operation
• Setting LED Intensity
• GPO Mode
• Blinking LEDs
• Gradation Features

Specifications

Frequently asked questions

How many data registers does the LTC3219 have?

The device has 12 data registers, each with its own sub-address.

Can the LEDs be controlled without using the I2C bus?

Yes, an external enable (ENU) pin can be used to control the LEDs.