Introduction

This document describes the CAT4237EVAL2

Evaluation Board for the Catalyst Semiconductor CAT4237

white LED driver. The functionality and major parameters

of the CAT4237 can be evaluated with the CAT4237EVAL2

board.

The CAT4237 is a high voltage CMOS constant−current

DC/DC converter that has been designed to drive with high

efficiency white or other high brightness LEDs. The

high−voltage output stage allows driving up to 8 white LEDs

in series. A single external resistor sets the LED current

between 5 mA and 30 mA. LED current can be adjusted

using either a pulse width modulated (PWM) signal or a DC

voltage. Detailed descriptions and electrical characteristics

are in the CAT4237 data sheet.