MP2721 5A I2C-Controlled NVDC Buck Charger QFN-22

MP2721 5A I2C-Controlled NVDC Buck Charger QFN-22

The MP2721 is a highly integrated, 5A, switch- mode battery management device for single- cell Li-ion or Li-polymer batteries.

Key Specifications

Features

• Supports USB BC1.2 and Non-Standard Adapters
• 26V Sustainable Input Voltage (VIN)
• 80mA to 5A Charge Current (ICC), Configurable via the I2C
• 100mA to 3.2A Input Current (IIN_LIM) Limit, Configurable via the I2C
• Minimum VIN Loop for Maximum Adapter Power Tracking
• Configurable 750kHz to 1.5MHz Switching Frequency
• Integrated 15mΩ Low-RDS(ON) Battery MOSFET with Shipping and Reset Modes
• Ultra-Low 8.5μA Battery Discharge Current in Shipping Mode
• Down to 30mA Termination Current Settings for Wearable Applications
• I2C Port for Flexible System Parameter Setting and Status Reporting

Typical Application Circuit

Applications

• General ≤15W USB Applications
• Bluetooth Headphones
• Bluetooth Speakers
• Point-of-Sale (POS) Terminals

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