The MP2639AGR is a highly integrated, flexible, switch-mode, battery-charging management device for 2-cell series Li-ion and Li-polymer batteries used in a wide range of portable applications.The MP2639AGR is able to charge a 2-cell battery from a 5V adapter or USB input. The MP2639AGR can work in three modes: charge mode, discharge mode, and sleep mode. In 2-cell applications, the 5V input charges the 2-cell battery via the MP2639AGR operating in step-up mode. When the 5V input is absent, the 2-cell battery voltage is discharged to the 5V output via the MP2639AGR working in step-down mode.For the charging function, the MP2639AGR detects the battery voltage automatically and charges the battery in three phases: trickle current, constant current, and constant voltage. Other features include charge termination and auto-recharge.To guarantee safe operation, the MP2639AGR limits the die temperature to a preset value of 120°C. Other safety features include input over-voltage protection (OVP), battery over-voltage protection (OVP), thermal shutdown, battery temperature monitoring, and a programmable timer to prevent prolonged charging of a dead battery.The MP2639AGR is available in a QFN-26 (4mmx4mm) package.
Feature
- 4.0V to 5.75V Input Voltage Range
- Charge 2-Cell Batteries with 5V Input
- USB-Compliant Charger
- Integrates Input Current-Based and Input Voltage-Based Power Management Functions
- Programmable Input Current and Input Voltage Limit
- Up to 2.5A Programmable Charge Current for 2-Cell Applications
- 8.4V Charge Voltage with 0.5% Accuracy
- Cell Balance with 200mA current
- Up to 5.0A Programmable Discharge Current
- Negative Temperature Coefficient Pin for Temperature Monitoring
- No Load Shutdown and Push Button Turn-On in Discharge Mode
- Programmable Timer Back-Up Protection
- Discharge Mode Load Trace Compensation
- Thermal Regulation and Thermal Shutdown
- Internal Battery Reverse Leakage Blocking
- Integrated Short-Circuit Protection (SCP) for Both Charge and Discharge Mode
- Four LED Battery Level and Status Indicators
- Available in a QFN-26 (4mmx4mm) Package
