MP2720A 2.2A I2C-Controlled Buck Charger QFN-22

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MP2720A 2.2A I2C-Controlled Buck Charger QFN-22

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MPS Battery Management charger QFN-22 LED Power Management Buck

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MP2720A 2.2A I2C-Controlled Buck Charger QFN-22

The MPS MP2720A is a I2C-Controlled Buck Charger. It is rated for 2.2 A, handles 1s battery stacks and switches at 1.5 MHz. It is supplied in a QFN-22 package.

The MP2720A is a highly integrated, 2.2A switch-mode battery management device for single-cell Li-ion or Li-polymer batteries.

Key Specifications

Part Number	MP2720A
Function	I2C-Controlled Buck Charger
Current Rating	2.2 A
Battery Cells	1s
Switching Frequency	1.5 MHz
Interface	I²C
Package	QFN-22
Ordering Codes	MP2720A

Features

2.2A Switching Charger with Narrow- Voltage DC (NVDC) Power Path Management
Supports USB BC1.2 and Non-Standard Adapters
26V Sustainable Input Voltage (VIN)
Configurable 40mA to 2.2A Charge Current (ICC) via I2C
Configurable 100mA to 3.2A Input Current Limit (IIN_LIM) via I2C
Minimum VIN Loop for Maximum Adapter Power Tracking
Configurable 750kHz to 1.5MHz Switching Frequency (fSW)
Integrated 30mΩ Low-RDS(ON) Battery MOSFET with Shipping and Reset Modes
Ultra-Low 8.5μA Battery Discharge Current in Shipping Mode
Down to 15mA Termination Current Settings for Wearable Applications

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.