EUP2584

EUP2584 White LED Step-Up Converter In Tiny SOT-23 Package DESCRIPTION The EUP2584 is a constant current step-up converter specifically designed to drive white LEDs. The Step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. The EUP2584 switches at 1.1MHz, allowing the use of tiny external components. The input and output capacitor can be as small as 1µF, saving space and cost versus alternative solutions. A low 0.25V feedback voltage minimizes power loss in the current setting resistor for better efficiency. EUP2584 is enhanced with Soft-Start function and that could significantly reduce noise induced by capacitor. The EUP2584 is available in low profile SOT23-6 package. FEATURES z z z z z z z z z z 2.6V to 5.5V Input Range 27V Output with Over Voltage Protection High Efficiency :85 % Typical Internal Soft-Start PWM Dimming Control Internal High Power 30V MOSFET Switch Fast 1.1MHz Switching Frequency Small, Low-Profile Inductors and Capacitors SOT23-6 Package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS z z z z z Mobile Phone Digital Still Camera PDAs, Handheld Computers MP3 Players GPS Receivers VÛm w`R yÑb € Typical Application Circuit ww w.g ofot ech. com Figure 1. White LED Application DS2584 Ver1.1 Mar. 2008 1 N~§NãtÿmñW3^VÛmw`RyÑb€g–PQlSø Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com EUP2584 Pin Configurations Package Type Pin Configurations SOT23-6 Pi...