EUP2595 Datasheet, PDF (1/10 Pages) Eutech Microelectronics Inc – 32V Step-Up Converters for Two to Nine White LEDs

EUP2595
32V Step-Up Converters
for Two to Nine White LEDs
DESCRIPTION
The EUP2595 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 EUP2595 can drive 9 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.
1MHz current-mode, pulse-width modulated (PWM)
operation allows for small input and output capacitors
and a small inductor while minimizing ripple on the
input supply/battery. Programmable soft-start
eliminates inrush current during startup.
The EUP2595 is available in a space-saving, 8-pin
3mm x 3mm TDFN package.
FEATURES
z 2.6V to 5.5V Input Range
z 32V (max) Output with Overvoltage Protection
z Up to 90% Efficiency
z Flexible Analog or PWM Dimming Control
z Internal High Power MOSFET Switch
z < 1µA shutdown Current
z Fast 1MHz PWM Operation
z Small, Low-Profile Inductors and Capacitors
z 3mm × 3mm TDFN-8 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Cell Phones and Smart Phones
z PDAs, Palmtops, and Wireless Handhelds
z e-Books and Subnotebooks
z White LED Display Backlighting
Typical Application Circuit
DS2595 Ver1.1 Aug. 2008
Figure 1. Typical Application Circuit
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