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EUP2595 Datasheet(PDF) 1 Page - Eutech Microelectronics Inc |
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EUP2595 Datasheet(HTML) 1 Page - Eutech Microelectronics Inc |
1 / 10 page EUP2595 DS2595 Ver1.1 Aug. 2008 1 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. Typical Application Circuit FEATURES 2.6V to 5.5V Input Range 32V (max) Output with Overvoltage Protection Up to 90% Efficiency Flexible Analog or PWM Dimming Control Internal High Power MOSFET Switch < 1µA shutdown Current Fast 1MHz PWM Operation Small, Low-Profile Inductors and Capacitors 3mm × 3mm TDFN-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 Figure 1. Typical Application Circuit |
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