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
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
APPLICATIONS
7~10 inch White LED Display Backlighting
12V Automotive Display System
PDVD and Subnotebooks
LED Lighting
Typical Application Circuit
Figure 1. High Brightness LEDs Application
DS2983
Ver1.2
Nov. 2008
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
