Preface
© 2005 Microchip Technology Inc. DS51586A-page 3
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DOCUMENT REVISION HISTORY
Revision A (November 2005)
Initial Release of this Document.
MCP1650 Multiple White LED Demo Board User’s Guide
DS51586A-page 4 © 2005 Microchip Technology Inc.
NOTES:
MCP1650 MULTIPLE WHITE LED
DEMO BOARD USERS GUIDE
© 2005 Microchip Technology Inc. DS51586A-page 5
Chapter 1. Product Overview
1.1 INTRODUCTION
The number of applications that utilize white LEDs has steadily increased due to the
extended usage of Liquid Crystal Displays (LCDs) in automotive and cellular telephone
displays, PDAs, handheld electronic games and computer monitors. In order to view
the information on these displays, a light source is needed. Typically, this light source
has been provided by Cold Cathode Flourescent Tubes (CCFT). New product designs
are using White or Blue LEDs as the backlighting source. The MCP1650 is an excellent
choice for driving nine white LEDs with an efficiency of 80%. The peak intensity is set
by the feedback (FB) to the MCP1650. Dimming is accomplished by pulse-width
modulating the shutdown pin of the device.
This chapter covers the following topics:
What is the MCP1650 Multiple White LED Demo Board?
What the MCP1650 Multiple White LED Demo Board Kit includes?
FIGURE 1-1: MCP1650 Multiple White LED Demo Board Block Diagram.
Input Voltage:
2.7V - 4.5V supplied by
3 Alkaline Batteries
Boost Power Train
including MCP1650
On/Off and Dimming
Features provided by
PIC10F202
Momentary Switch

MCP1650DM-LED2

Mfr. #:
Manufacturer:
Microchip Technology
Description:
Power Management IC Development Tools MCP1650 Mult Wht LED Demo Brd
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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