描述 Description

The MCP73811/2 devices are linear charge management controllers that are designed for use in space limited and cost sensitive applications. The MCP73811/2 provide specific charge algorithms for single cell Li-Ion or Li-Polymer battery to achieve optimal capacity in the shortest charging time possible. Along with its small physical size, the low number of external components required make the MCP73811/2 ideally suited for portable applications. For applications charging from a USB port, the MCP73811 adheres to all the specifications governing the USB power bus.

特性 Features

? Complete Linear Charge Management Controller

- Integrated Pass Transistor

- Integrated Current Sense

- Integrated Reverse Discharge Protection

? Constant Current / Constant Voltage Operation with Thermal Regulation

? High Accuracy Preset Voltage Regulation: + 1%

? Voltage Regulation: 4.20V

? Selectable Charge Current:

- MCP73811: 85 mA / 450 mA

? Programmable Charge Current:

- MCP73812: 50 mA - 500 mA

? Minimum External Components Required:

- MCP73811: 2 Ceramic Capacitors

- MCP73812: 2 Ceramic Capacitors and 1 Resistor

? No Preconditioning

? No End-of-Charge Control

? No Undervoltage Lockout (UVLO)

? Automatic Power-Down when Input Power Removed

? Active High Charge Enable

? Temperature Range:

- -40°C to +85°C

? Packaging:

- 5-Lead SOT-23

Applications

? Low-Cost Lithium-Ion/Lithium-Polymer Battery Chargers

? Rechargeable Toys

? Electronic Cigarettes

? Bluetooth Headsets

? USB Chargers