MP2637 4.5-6V, 2.5A Single Cell Switch Mode Battery Charger

MP2637 4.5-6V, 2.5A Single Cell Switch Mode Battery Charger

The MP2637 is a highly-integrated, flexible, switch-mode battery charger with system power path management, designed for single-cell Li- ion or Li-Polymer batteries used in a wide range of applications.

Key Specifications

Features

• Up to 16V Sustainable Input Voltage
• 4.5V-to-6V Operating Input Voltage Range
• Power Management function, Integrated Input-Current Limit, Input Voltage Regulation
• Up to 2.5A Programmable Charge Current
• Trickle-Charge Function
• Selectable 4.2V/ 4.35V Charge Voltage with 0.5% Accuracy
• Negative Temperature Coefficient Pin for Battery Temperature Monitoring
• Programmable Timer Back-Up Protection
• Thermal Regulation and Thermal Shutdown
• Internal Battery Reverse Leakage Blocking

Typical Application Circuit

Applications

• Sub-Battery Applications

Design Notes

• Charge current accuracy depends on the sense resistor tolerance, so use a 1% or better part and keep its traces Kelvin-connected.
• Wire the NTC input for JEITA profile control if the pack is charged over temperature.
• Set the input current limit to what the adapter can actually deliver; a limit above the adapter rating causes the input rail to collapse mid-charge.
• Termination current and recharge threshold dominate cycle life in shallow-cycling products.

Common Questions