MCP73871-2CCI/ML

Overview

The MCP73871-2CCI/ML is a fully integrated linear charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It features an internal power path manager that enables simultaneous system load sharing and battery charging from AC-DC wall adapters or USB ports. The device supports selectable input sources and includes integrated pass transistors, current sensing, and reverse discharge protection. It offers preset high-accuracy charge voltage options with ±0.5% regulation tolerance and constant current/constant voltage operation.

Feature Summary

• Integrated system load sharing allows simultaneous powering of the host system and charging of the Li-Ion/Li-Po battery
• Voltage proportional current control ensures system load priority over battery charging current
• Low-loss power-path management with ideal diode operation minimizes external component requirements

Applications

• Portable consumer electronics requiring seamless power transition
• IoT sensor nodes with mixed AC-DC and USB power availability
• Battery-powered devices utilizing AC-DC wall adapters as primary inputs

Procurement Notes

Verify the suffix '2CCI' corresponds to the specific 4.20V preset voltage option required for your design. Confirm the ML package designation matches your PCB footprint specifications. Ensure compatibility with the intended input source type, whether USB or AC-DC adapter, as the controller manages both automatically.

Selection Notes

Select this component when a compact solution for load sharing and charging is needed without external MOSFETs. The integrated pass transistor simplifies the bill of materials. Consider the thermal performance under maximum total input current conditions. Verify that the preset voltage setting aligns with the specific battery chemistry used in the application.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. The family provides various voltage presets and package options to suit different portable applications. The device integrates functions typically requiring multiple discrete components, reducing board space and design complexity for battery-powered systems.

Replacement Considerations

• MCP73871-1AAI/ML
• MCP73871-1CAI/ML
• MCP73871-1CCI/ML

FAQ

How does the MCP73871 manage power between the system load and the battery?

It uses voltage proportional current control (VPCC) to ensure the system load has priority over the battery charge current, allowing simultaneous operation.

What input power sources are supported by this controller?

The device supports autonomous selection between USB ports and AC-DC wall adapters as input power sources.