EUP2983

EUP2983 White LED Driver For Buck-Boost Application DESCRIPTION The EUP2983 is a constant current boost converter specially designed for driving white LEDs with wide input range. The unique converter topology provide a load voltage which can be greater or less than the input voltage. With the tightly regulated load current, the EUP2983 allows series connection with multiple strings of the white LEDs. The brightness of the LEDs can be adjusted through a voltage level on the CTRL pin or by applying a PWM signal to CTRL 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 EUP2983 is available in a space-saving, 8-pin 3mm x 3mm TDFN package. FEATURES z z z z z z z z z z z z z 6V to 25V Input Range 32V (typ.) Output with Overvoltage Protection Up to 90% Efficiency Flexible Analog or PWM Dimming Control Internal High Power MOSFET Switch 1MHz PWM Operation Small, Low-Profile Inductors and Capacitors 3mm× 3mm TDFN-8 Package RoHS Compliant and 100% Lead (Pb)-Free 7~10 inch White LED Display Backlighting 12V Automotive Display System PDVD and Subnotebooks LED Lighting APPLICATIONS Typical Application Circuit VÛm w`R yÑb € ww w.g ofot ech. com Figure 1. High Brightness LEDs Application DS2983 Ver1.2 Nov. 2008 1 N~§NãtÿmñW3^VÛmw`RyÑb€g–PQlSø Tel: 0755-8398 3377 / 135 9011 2223...