Protector 
Power 
Signal 
Driver 
Automotive ET6309
General Description
The ET6309 are three constant current RGB LED drivers with I2C interface. The devices are ideally powered from 3.3V or 5V supplies. The independent programmable constant current sinks operate without external components.
By the nine internal registers programming, the each three LED channels can work in variety modes, a total of 192 current levels are available for each channel from 0.125mA to 24mA with a 0.125mA step or 0.25mA to 48mA with a 0.25mA step.
The device has design three kinds of interconnected threads, each channel can carry on any threads mode with an on-chip timing control unit, LED blink rate, fade-in(256 steps) and fade-out(256 steps) are user-adjustable resulting in unique color lighting patterns. The ET6309 have ADDR and SYN pin, it can realize four chips cascade with one group of I2C bus and one synchronous clock. In shutdown mode, the quiescent current is reduced to less than 1μA.
The driver is available in a QFN16 package. The package is Pb-free and RoHS compliant.
Features
Ultra low dropout regulated current sinks, 75mV typical at 10mA per channel
Each nine programmable LED setting registers are shared by each three LED
I2C control, one ADDR pin realize four chip address selection
SYN pin can supply chips cascade synchronous clock
Individual channel control
- On/Off Interval Time Control
- Dimming Up/Down Time produced by 256 steps internal PWM
- Current Level Setting
- RGB LED Color Control
- RGB Delay Time and FLASH Period Control
192 current levels: 24mA max@0.125mA step or 48mA max@0.25mA step
±5% current matching for max current, low supply current of 450μA typ
No noise, non-pulsating LED current, Fast, smooth start-up
VIN Range Voltage from 2.7V to 5.5V
0.1μA Low Shutdown Current
Pb-free Package: QFN16 (3mm x 3mm x 0.75mm)
Inside Temperature Protection
Applications
RGB indicator LEDs
Flashing LEDs
Handheld Devices
Digital Cameras
Pin Configuration
Block Diagram
Application Circuits
