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
2.6V to 5.5V Input Range
26V Output with Over Voltage Protection
High Efficiency :85 % Typical
PWM Dimming Control
Internal High Power 30V MOSFET Switch
Fast 1.1MHz Switching Frequency
Small, Low-Profile Inductors and Capacitors
SOT23-5,SOT23-6 Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Mobile Phone
Digital Still Camera
PDAs, Handheld Computers
MP3 Players
GPS Receivers
Typical Application Circuit
Figure 1.
White LED Application
DS2571 Ver1.1 May. 2007
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
