MCP1252DM-BKLT: 120mA @ 4V Max, 2.3 ~ 5.5V in

Summary

This demo board demonstrates the use of a Charge Pump device in an LED application. The board also serves as a platform to evaluate the MCP1252 device in general.

The MCP1252-ADJ is an excellent choice for biasing the back lighting or driving other LED applications. Light intensity is controlled uniformly through the use of ballast resistors. Dimming is accomplished by pulse-width modulating the shutdown pin of the device.

Features:

• Programmed MCP1252 Charge Pump control (via the PIC10F206)

• Four white LEDs

• The PIC10F206 microcontroller:

• Enables the MCP1252 Charge pump

• Controls light intensity

• Places system into sleep mode ( Less than 1uA)

• Push-button interface for multiple control options

• Baseline Flash Microcontroller Programmer (BFMP) Header for reprogramming the PIC10F206

• 3 AAA Battery Pack (Batteries not included)

Specifications

Manufacturer	Microchip Technology
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	MCP1252DM-BKLT-ND
Eval Board Supplier	Microchip Technology
Eval Board	Board not Stocked
Voltage In	2.3 ~ 5.5 V
Topology	Linear
Current Out	120 mA
Voltage Out (Max)	4 V
Outputs and Type	1 Non-Isolated
Efficiency @ Conditions	- Not Given
Features	Dimming Control MCU Controlled Shutdown, Enable, Standby
Switching Frequency	650 kHz
Component Count + Extras	18 + 8
Design Author	Microchip Technology
Application / Target Market	Cell Phones Digital Cameras White Goods
Main I.C. Base Part	MCP1252-ADJ
Date Created By Author
Date Added To Library	2011-03