Datasheet

MCP73871 EVALUATION BOARD

USER’S GUIDE

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP73871 Evaluation Board demonstrates Microchip's stand-alone linear Li-Ion

battery charger with system power path and load sharing management control solution.

The system load is also supported by the Li-Ion battery when the input power is

disconnected. A number of device options allow the MCP73871 to be utilized in a

variety of applications. Refer to the MCP73871 Data Sheet (DS22090) and/or contact

local Microchip supports for additional device options.

Typical applications for the reference design are Smart Phones, PDA, Portable Media

Players, MP3 Players, Digital Cameras, Handheld Medical devices, Bluetooth head-

sets, Ultra-Mobile PC and Portable Communicators.

2.2 FEATURES

The MCP73871 Evaluation Board has the following features:

• Integrated System Load Sharing

• Input Current Limit Control with dip switches between ac-dc adapter (Typical

1650 mA), USB-High (Maximum 500 mA) and USB-Low (Maximum 100 mA)

• Three LED indicates charge status, low battery and power good signal

• Preset Li-Ion battery charge voltage: 4.2V

±0.5%

• Temperature monitoring is disabled by default, but can be enabled to use with

NTC thermister

• Factory preset 0.1C preconditioning current of deeply depleted cells

• Factory preset 6 hour Safety Timer with Timer Enable feature

• Constant Current / Constant Voltage (CC/CV) charge algorithm

• Resistor programmed maximum charge current: 1A

• Resistor programmed termination set point: 100 mA

• Automatic Charge Termination

• Automatic Recharge

• Internal Thermal Regulation

• Exposed Pad with extra via underneath for better heat dissipations