MCP7381X LI-ION BATTERY CHARGER

EVALUATION BOARD USER’S GUIDE

© 2008 Microchip Technology Inc.

DS51729A-page 9

Chapter 2. Installation and Operation

2.1

INTRODUCTION

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board demonstrates

Microchip's Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge

Management Controllers, MCP73811 and MCP73812. The MCP73811 is powered

from USB port to charge Li-Ion / Li-Polymer batteries. The charge current is logic

selectable between High (500 mA) and Low (100 mA). The MCP73812 is designed to

charge Li-Ion / Li-Polymer batteries with programmable charging current up to 500 mA

by a single resistor from a regulated 5V ac-dc wall adapter.

The MCP73811/2 require only minimum components to implement a completed circuit

of Li-Ion / Li-Polymer battery charge management in any systems. The development of

MCP73811/2 meets the challenges of today’s cost-sensitive and space-limited applica-

tions.

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board comes with a

pre-installed 5-Lead SOT-23 MCP73811 and a pre-installed 5-Lead SOT-23

MCP73812.

Typical applications for MCP73811/2 are Rechargeable Toys, Low-Cost Lithium-Ion /

Lithium-Polymer Battery Chargers, Electronic Cigarettes, Rechargeable Portable

Electronic Devices, Bluetooth Headsets or USB Chargers.

2.2

FEATURES

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board has the following

features:

• 2-position Dip Switch for charge current selections between USB_Low and

USB_High.

• Chip Enable (CE) Pin to disable the system when drive Low.

Resistor) values. See Figure 2-1