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500mA, 5V USB, I2C-Controlled Battery Charger with Power Path Management for Single-Cell Li-Ion Battery in QFN Package
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The MP2664 is a highly integrated, single-cell, Li-ion/Li-polymer battery charger with system power path management for space-limited, portable applications. The MP2664 uses input power from either an AC adapter or a USB port to supply the system load and charge the battery independently. The charger features constant current pre-charge, constant current fast-charge (CC) and constant voltage (CV) regulation, charge termination, and charge status.
The power path management function ensures continuous power to the system by automatically selecting the input, the battery, or both to power the system. This power stage features a low dropout regulator from the input to the system and a 100mΩ switch from the battery to the system. Power path management separates the charging current from the system load, which allows for proper charge termination and keeps the battery in full-charge mode.
The MP2664 provides system short-circuit protection (SCP) by limiting the current from the input to the system and the battery to the system. This feature is especially critical for preventing the Li-ion battery from being damaged by excessively high currents. An on-chip battery under-voltage lockout (UVLO) cuts off the path between the battery and the system if the battery voltage drops below the programmable battery UVLO threshold, which prevents the Li-ion battery from being over-discharged. An integrated I2C control interface allows the MP2664 to program the charging parameters, such as input current limit, input voltage regulation limit, charging current, battery regulation voltage, safety timer, and battery UVLO.
The MP2664 is available in a QFN-10 (2mmx2mm) package.
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Features & Benefits
- Fully Autonomous Charger for Single-Cell Li‑Ion/Li-Polymer Batteries
- Complete Power Path Management for Simultaneously Powering the System and Charging theBattery
- ±0.5% Charging Voltage Accuracy
- 13V Maximum Voltage for the Input Source
- I2C Interface for Setting Charging Parameters and Status Reporting
- Fully Integrated Power Switches and No External Blocking Diode Required
- Built-In Robust Charging Protection Including Battery Temperature Monitoring and Programmable Timer
- PCB Over-Temperature Protection (OTP)
- System Reset Function
- Built-In Battery Disconnection Function
- Thermal Limiting Regulation On-Chip
- Available in a QFN-10 (2mmx2mm) Package
EVKT-MP2664 Evaluation Kit Evaluation Kit for Highly Integrated, 1-Cell Li-Ion/Li-Polymer Battery Charger with System Power Path Management
The EVKT-MP2664 is an evaluation kit for the MP2664. The MP2664 is a highly integrated, single-cell Li-ion/Li-polymer battery charger with a system power path management function. The layout accommodates most commonly used capacitors. The default function of this board is preset for charger mode, and the charge-full voltage is preset to 4.200V for a single-cell Li-ion battery.
Evaluation Board for 500mA Linear Charger with Power Path Management for Single-Cell Li-Ion Battery in a QFN Package
Configure multiple charging parameters for the MP2664
Communication Interface Device USB to I2C/PMBus, included with product evaluation kit or can be purchased separately.