SGM31324.pdf
No.10886
● Ultra Low Dropout Regulated 3-CH Current Sinks
30mV (TYP) at 10mA per Channel
● Programmable LED Setting by I2C Compatible Interface
● Individual Channel Control
ON/OFF Interval Time Control
Dimming Up/Down Time
RGB LED Color Control
● 192 Current-Level Setting
0.125mA ~ 24mA, 0.125mA Step
● Auto Blink LED1 (D1 Pin) Mode
Blinking Period: 2s
Current Setting: 8mA
● No Noise, Non-Pulsating LED Current
● Fast, Smooth Start-Up
● Input Voltage Range: 2.5V to 5.5V
● Less than 1μA Shutdown Current
● -40℃ to +85℃ Operating Temperature Range
● Available in Green UTDFN-1.5×1.5-8L Package
The SGM31324 is a fully programmable, constant current RGB LED driver with a flexible control interface. The device is ideally powered from 1-cell Lithium-Ion/ Polymer, 3-cell NiCd/NiMH/Alkaline batteries, or systems with 3.3V or 5V supplies. It provides 3 independent programmable constant current sinks without requiring any external components.
With an on-chip timing control unit, LED blink rate, fade-in and fade-out are user-adjustable resulting in unique color lighting patterns.
Ten internal registers are programmed via the I2C control interface with a built-in decoder allowing individual control of the LED channels’ ON/OFF state and current level. A total of 192 current levels are available for each channel from 0.125mA to 24mA with a 0.125mA step.
An Auto Blink mode automatically turns on and off LED1 (on D1 pin) at 8mA every 2s after EN pin goes high. In this mode, a phone with a discharged battery connected to a charger can have LED1 blink to notify that the battery is charging.
In shutdown mode, the quiescent current is reduced to less than 1μA.
