DESCRIPTION

The EUP2561 is a constant current step-up converter specially designed for driving white LEDs. The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. The EUP2561 can drive 6 LEDs in series. The brightness of the LEDs can be adjusted through a voltage level on the CTRL pin or by applying a PWM signal to CRTL pin.

FEATURES

● 2.6V to 5.5V Input Range

● 26V (max) Output with Overvoltage Protection

● Up to 87 Efficiency

● Flexible Analog or PWM Dimming Control

● Internal High Power 30V MOSFET Switch

● < 1µA shutdown Current

● Fast 1MHz PWM Operation

● Small, Low-Profile Inductors and Capacitors

● 3mm× 3mm DFN-8 Package

● RoHS Compliant and 100 Lead (Pb)-Free

APPLICATIONS

● Cell Phones and Smart Phones

● PDAs, Palmtops, and Wireless Handhelds

● e-Books and Subnotebooks

● White LED Display Backlighting