AN30 Datasheet, PDF (1/7 Pages) Copal Electronics – 6-Channel LED Driver

Application Note 30
W-5626DB1 Evaluation/Demo Board for W-5626
6-Channel LED Driver
Denisa Stefan, Applications Engineer
Cornel Rotaru, Applications Engineer
1. INTRODUCTION
This document describes the W-5626DB1
Evaluation/Demonstration Board for the COPAL
ELECTRONICS W-5626 6-Channel LED driver with
I²C interface. The functionality and major parameters
of the W-5626 can be evaluated with the
W-5626DB1 board.
The W-5626 is a 6-channel charge pump that has
been designed to drive up to 6 LEDs connected in
parallel. The device can drive three groups of two
LEDs. Each group can be configured with
independent LED current of up to 32mA max per
channel through the I²C serial interface. The W-5626
is operating in either 1x mode (LDO), or 1.5x mode
and provides tightly matched regulated current
through the six LED outputs. Each LED channel can
be also turned off/on independently through the I²C
bus. Detailed descriptions and electrical
characteristics are in the W-5626 data sheet.
2. W-5626EVAL1 BOARD
HARDWARE
The board contains the W-5626 in a typical
application circuit, driving 2 RGB LEDs or 6 white
LEDs. The W-5626 is controlled through the I²C
serial interface using an 8-bit microcontroller. The
user can chose to drive on/off any LEDs combination
or to set the desired LED current through a PC serial
interface. The board is powered from an attached 9V
battery. The block diagram of the board hardware
schematic is shown in Figure 1.
W-5626
Figure 1. W-5626DB1 Block Schematic
© 2006 NIDEC COPAL ELECTRONICS CORP.
1
Characteristics subject to change without notice
Doc. No. 6047 Rev. A