GENERAL DESCRIPTION

The SGM31324 is a 3-channel, current-regulated RGB

LED driver with an I

2

C-compatible interface. It is well

suited for various applications powered by a 1-cell

Li-Ion or Li-Polymer, or systems with 3.3V or 5V supply

voltages, as well as 3-cell NiCd, NiMH or Alkaline

batteries. No external components are required for the

three constant current sinks.

With two programmable timers, users can adjust LED

blinking time and get the result of fade-in and fade-out for

unique color lighting.

Programmable I2

C interface allows independent channel

control for LED ON or OFF state and LED brightness due

to 10 internal registers and an internal decoder. Each

current sink can be independently configured with

192-step current levels from 0.125mA to 24mA. The

SGM31324 provides less than 1μA shutdown current.

An automatic blink mode allows the LED on D1 pin

(LED1) ON/OFF automatically at an 8mA load every 2

seconds after the EN pin is pulled high.

The SGM31324 is available in a Green UTDFN1.5×1.5-8L package. It operates over an ambient

temperature range of -40℃ to +85℃

FEATURES

● Input Voltage Range: 2.5V to 5.5V

● Ultra-Low 30mV Dropout Voltage at a 10mA Load

per String

● Programmable LED Current through I

2

C Interface

● 0.125mA to 24mA Current Levels with 0.125mA

Steps

● Automatic Blink Mode on D1 Pin

 Maximum LED1 Current: 8mA

 Blinking Period: 2s

● Independent Channel Control

 ON/OFF State Interval Time Control

 RGB LED Color Control

 Programmable Ramp-Up and Ramp-Down Time

● No Noise and Constant LED Current

● Fast and Smooth Startup

● Less than 1μA Shutdown Current

● -40℃ to +85℃ Operating Temperature Range

● Available in a Green UTDFN-1.5×1.5-8L Package

APPLICATIONS

Multi-Color LEDs

RGB Indicator LEDs

Impact LED Signs and Displays

Handheld Equipment