MP2635 4.5-6V, 2A Single Cell Switch Mode Battery Charger QFN-24

MP2635 4.5-6V, 2A Single Cell Switch Mode Battery Charger QFN-24

The MP2635 is a highly-integrated, flexible, switch-mode battery charge management and system power path management device for a single-cell Li-ion and Li-Polymer battery used in a wide range of portable applications.

Key Specifications

Features

• 4.5V-to-6V Operating Input Voltage Range
• Power Management Function Integrated Input-Current Limit and Input-Voltage Regulation
• Up to 2A Programmable Charge Current
• Trickle-Charge Function
• Selectable Charge Voltage with 0.5% Accuracy: 3.6V/4.2V(MP2635) or 4.35V/4.2V(MP2635B)
• Negative Temperature Coefficient Pin for Battery Temperature Monitoring
• Programmable Timer Back-Up Protection
• Thermal Regulation and Thermal Shutdown
• Internal Battery Reverse Leakage Blocking
• Reverse Boost Operation Mode for System Power

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