MP2731 3.7-16V, 4.5A I2C-Controlled SW Charger QFN-26

MP2731 3.7-16V, 4.5A I2C-Controlled SW Charger QFN-26

The MP2731 is a 4.5A, highly integrated switch- mode battery charge management device for single-cell Li-ion or Li-polymer batteries.

Key Specifications

Features

• 3.7V to 16V Operating Input Voltage Range
• Up to 22V Sustainable Voltage
• High-Efficiency, 4.5A, 1.35MHz Buck Charger: Up to 92% Charge Efficiency with 3A Charge Current: o Configurable DP/DM for Flexible Fast Charge Protocol Support
• USB OTG with 4.8V to 5.5V Adjustable Output: Up to 3.0A Output, Up to 93% Efficiency with 1.5A Output
• NVDC Power Path Management: o Instant-On Works with No Battery or Deeply Discharged Battery o Ideal Diode Operation in Battery Supplement Mode
• High Battery Discharge Efficiency with 14mΩ BATFET Up to 8.5A
• I2C Port for Flexible System Parameter Setting and Status Reporting
• Fully Integrated Power MOSFETs and Current Sensing
• Dedicated DISC Pin to Control Shipping Mode and System Reset
• 13µA Low Battery Leakage Current in Shipping Mode

Typical Application Circuit

Applications

• Tablet PCs
• Smartphones
• Wireless Cameras

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