EUP3651

EUP3651 4-Channel, 1X/1.5X Charge Pump White LED Driver DESCRIPTION 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 5mA and 25mA. 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. FEATURES 1X/1.5X Mode for Ultra-High Efficiency Up to 25mA Output Current for Each Channel 2.7V to 5.5V Input Voltage 1MHz Fixed Switching Frequency Single-Wire Serial Pulse Interface to Set LED Current with 16-step Linear scale Soft Start Function Built-In Short-Circuit Protection Built-in Thermal Protection IQ