MCP1252 CHARGE PUMP BACKLIGHT
LED DEMO BOARD USER’S GUIDE
©
2005 Microchip Technology Inc.
DS51551A-page 5
Chapter 1. Product Overview
1.1
INTRODUCTION
Today’s new color displays require a pure white light for backlighting. White
light-emmitting diodes have become the component of choice. The MCP1252-ADJ is
an excellent choice for biasing the backlighting or driving other LED applications. Light
intensity is controlled uniformly through the use of ballast resistors. The peak intensity
is set by the feedback (FB) to the the MCP1252-ADJ. Dimming is accomplished by
pulse-width modulating the shutdown pin of the device.
This chapter covers the following topics:
• What is the MCP1252 Charge Pump Backlight LED Demo Board?
• What the MCP1252 Charge Pump Backlight LED Demo Board Kit Includes
FIGURE 1-1:
MCP1252 Charge Pump Backlight LED Demo Board Block
Diagram.
PIC10F206
MCP1252
3 AAA
Battery
Pack
Power
Supply
V
OUT
FB
SHDN
Push Button
