MCP73834T-FCI/UN

Overview

The MCP73834T-FCI/UN is a single-cell lithium-ion or lithium-polymer battery charge management controller manufactured by Microchip Technology. It operates within a supply voltage range of 3.75 V to 6 V and provides a regulated output voltage of 4.2 V with an output current capability of 1.2 A. The device is housed in a 10-pin MSOP package designed for surface mount technology. It supports an operating temperature range from -40°C to +85°C. The 'T' suffix indicates the component is supplied in a tape and reel packaging format.

Feature Summary

• Integrates auto-discharge function to minimize self-discharge when the system power supply is removed
• Includes thermal regulation feature that reduces charging current to limit die temperature rise
• Provides status indicator pin to monitor charging state and fault conditions

Applications

• Portable electronic devices requiring single-cell lithium-ion or lithium-polymer battery charging
• USB-powered applications utilizing auto-switching between USB and DC input sources
• Battery management systems in consumer electronics and industrial handheld instruments

Procurement Notes

Verify the specific suffix codes against official Microchip documentation to confirm package type, temperature grade, and packaging format. Ensure compatibility with your PCB footprint and thermal design requirements. Confirm RoHS compliance status through the manufacturer's latest datasheet or certification documents before finalizing procurement specifications.

Selection Notes

Select this component for designs requiring integrated thermal regulation and auto-discharge capabilities in a compact MSOP package. Compare against similar models like the MCP73837 if additional input switching features are required. Evaluate the 1.2 A output current against the target battery capacity and desired charge time constraints.

Part Context

This part belongs to the MCP7383x series of charge management controllers from Microchip Technology. The series offers various configurations for single-cell lithium batteries, differing in package options, temperature ranges, and specific feature sets such as input switching or status indication methods.

FAQ

What is the purpose of the auto-discharge feature?

The auto-discharge feature ensures that the battery voltage drops below a specified threshold after the charger is disconnected, preventing false charging detection upon reconnection.

How does thermal regulation affect charging?

Thermal regulation monitors the internal die temperature and automatically reduces the programmed charging current if the temperature exceeds a safe limit to prevent overheating.