描述 Description

The MCP73837 and MCP73838 devices are fully integrated linear Li-Ion / Li-Polymer battery chargers with autonomous power source selection. Along with its small physical size, the low number of external components required makes the MCP73837/8 ideally suitable for portable applications.

特性 Features

? High Accuracy Preset Voltage Regulation: +0.5

? Available Voltage Regulation Options:

- 4.20V, 4.35V, 4.4V, or 4.5V

? Complete Linear Charge Management Controller:

- Autonomous Power Source Selection

- Integrated Pass Transistors

- Integrated Current Sense

- Integrated Reverse Discharge Protection

? Constant Current (CC) / Constant Voltage (CV) Operation with Thermal Regulation

? Selectable USB-Port Charge Current:

- Low: 1 Unit Load / High: 5 Unit Loads

? Programmable AC-Adapter Charge Current:

- 15mA - 1000mA

? Two Charge Status Outputs

? Power-Good Monitor: MCP73837

? Timer Enable: MCP73838

? Automatic Recharge:

- Selectable Voltage Threshold

? Automatic End-of-Charge Control:

- Selectable Charge Termination Current Ratio

- Selectable Safety Timer Period

? Preconditioning of Deeply Depleted Cells - can be disabled

? Battery Cell Temperature Monitor

? UVLO (Undervoltage Lockout)

? Automatic Power-Down when Input Power is Removed

? Low-Dropout (LDO) Linear Regulator Mode

? Numerous Selectable Options Available for a Variety of Applications:

- Refer to Section 1.0 “Electrical Characteristics”for Selectable Options”

- Refer to the “Product Identification System”for Standard Options

? Temperature Range: -40°C to 85°C

? Packaging:

- 10-Lead 3 mm x 3 mm DFN

- 10-Lead MSOP*

* Consult Factory for MSOP Package Availability.

Applications

? Smart Phones and Personal Data Assistants(PDA)

? Portable Media Players(PMP)

? Ultra Mobile Devices(UMD)

? Digital Cameras

? MP3 Players

? Bluetooth Headsets

? Handheld Medical Devices

? AC/USB Dual Source Li-Ion Battery Chargers