EUP3651

The EUP3651 is a high efficiency charge pump white LED driver. It supports 4 white LEDs with regulated constant current for uniform intensity. The EUP3651 maintains the highest efficiency by utilizing a 1.5X fractional charge pump and low dropout current regulators. A low external parts count (two 1uF flying capacitors and two small 1uF capacitors at VIN and VOUT) makes the EUP3651 ideally suited for small battery-powered applications.

The EN logic input is used to enable, disable, and set current with a 16-step linear scale.The LED current can be configured between 3mA and 30mA in regular mode and all current can be changed to 15% of previous setting when entering low power mode. If EN is kept low for more than 1.5ms, the EUP3651 enters shutdown mode.

The EUP3651 is available in a 12-pin 3mm x 3mm TDFN package.