MCHPMCP73871T-4CAI/ML
Overview
The MCP73871T-4CAI/ML is a highly integrated Li-Ion/Li-Polymer battery charge management controller featuring autonomous system load sharing. It enables simultaneous battery charging and system powering from either a USB port or an AC-DC wall adapter, prioritizing the system load when input power is limited. This specific variant features a 4.4V float voltage and is housed in a compact 20-lead QFN package.
Why Choose This Part
The device features Voltage Proportional Current Control (VPCC) which ensures system stability when using current-limited power supplies. It includes an integrated ideal diode for low-loss power-path management and built-in reverse discharge protection to prevent battery drainage through the input source.
Applications
Key Specifications
Getting Started
Designers should begin with the MCP73871 Evaluation Board to test load-sharing behavior and thermal regulation. Ensure the thermal pad of the 20-VFQFN package is properly soldered to a ground plane to handle the heat dissipation during 1.1A fast-charge cycles. Use external resistors at the PROG1, PROG2, and PROG3 pins to configure fast charge current, USB current limits, and termination points respectively.
MCP7387 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Battery Pack Voltage | Stock |
|---|---|---|
| MCP73871T-4CAI/ML (this part) | 4.4V | 3,090 |
| MCP73871-2CCI/ML | 4.2V | 4,988 |
| MCP73871EV | — | 9 |
| MCP73871-2AAI/ML | 4.2V | 1,967 |
| MCP73871T-1CCI/ML | 4.1V | 3,530 |
| MCP73871-2CAI/ML | 4.2V | 979 |
| MCP73871T-2CAI/ML (Microchip) | 4.2V | — |
