EUP2571 Datasheet, PDF (1/14 Pages) Eutech Microelectronics Inc – White LED Step-Up Converter In Tiny SOT-23 Package

EUP2571
White LED Step-Up Converter
In Tiny SOT-23 Package
DESCRIPTION
The EUP2571 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 EUP2571 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.
The EUP2571 is available in low profile SOT23-5,
SOT23-6 package.
FEATURES
z 2.6V to 5.5V Input Range
z 26V Output with Over Voltage Protection
z High Efficiency :85 % Typical
z PWM Dimming Control
z Internal High Power 30V MOSFET Switch
z Fast 1.1MHz Switching Frequency
z Small, Low-Profile Inductors and Capacitors
z SOT23-5,SOT23-6 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Mobile Phone
z Digital Still Camera
z PDAs, Handheld Computers
z MP3 Players
z GPS Receivers
Typical Application Circuit
DS2571 Ver1.1 May. 2007
Figure 1. White LED Application
1