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Ⅰ.Overview of product

MCP73831T-2ACI/OT is a high-integration linear battery charger IC developed by Microchip Technology, specialized in single-cell lithium-ion/polymer battery charging. It adopts constant current/constant voltage charging mode, featuring compact packaging and complete protection functions, ideal for space-constrained portable electronic devices.

 
Ⅱ.Core parameter

Category:Integrated Circuits (ICs),Power Management (PMIC),Battery Chargers

Manufacturer:Microchip Technology

Packaging:Tape & Reel

Part Status:Active

Battery Chemistry:Lithium Ion/Polymer

Current - Charging:Constant - Programmable

Programmable Features:Current

Fault Protection:Over Voltage

Charge Current - Max:500mA

Battery Pack Voltage:4.2V

Voltage - Supply (Max):6V

Operating Temperature:-40°C ~ 85°C (TA)

Mounting Type:Surface Mount

Package / Case:SC-74A, SOT-753

Ⅲ.Main characteristics

Programmable Charging:Supports programmable constant charging current (max 500mA) via external resistor, adapting to different capacity lithium-ion/polymer batteries.

High Integration:Integrates pass transistor and current sensing module internally, no need for external MOSFET, detection resistor and isolation diode, simplifying circuit design.

Precise Voltage Regulation:Provides 4.2V preset charging voltage with 1% precision, ensuring safe and full charging of lithium-ion/polymer batteries.

Comprehensive Protection:Equipped with over-voltage protection and battery reverse connection protection, effectively preventing device and battery damage due to abnormal conditions.

Thermal Regulation:Features thermal feedback adjustment function, which regulates charging current automatically under high-power or high-temperature conditions to avoid overheating.

Low Power Consumption:Enters low-current standby mode automatically when charging is terminated, with supply current as low as 25μA in shutdown mode, reducing power waste.

Compact Packaging:Adopts SC-74A/SOT-753 surface-mount package, small in size, suitable for high-density PCB layout and miniaturized electronic products.

 
Ⅳ.Application field

Bluetooth Headsets: Charging management module in TWS Bluetooth headsets, providing safe and efficient charging for built-in lithium-polymer batteries.

Smart Watches: Charging control unit in smart watches, matching the small-capacity lithium-ion battery with programmable low-current charging to extend battery life.

Portable MP3 Players: Built-in charging circuit for portable MP3 players, realizing direct charging from USB ports with simple peripheral configuration.

IoT Sensor Nodes: Charging management for lithium-ion batteries in wireless temperature and humidity sensor nodes, supporting low-power standby to extend working hours.

USB Charging Cases: Core charging IC in small USB charging cases for wireless earbuds, ensuring stable charging current output and battery protection.

Handheld Game Consoles: Charging control module in mini handheld game consoles, adapting to different battery capacities via programmable current to balance charging speed and safety.

Ⅴ.Summary

MCP73831T-2ACI/OT is a high-performance, highly integrated lithium-ion/polymer battery charger IC. With its programmable charging, comprehensive protection, compact size and low power consumption, it is widely applicable to various portable electronic devices requiring efficient and safe battery charging management.