Monolithic Power Systems MP2635A

Description

The MP2635A is a highly-integrated, flexible, switch-mode battery charge management and system power path management device for a single-cell Li-ion and Li-Polymer battery used in a wide range of portable applications.The MP2635A has two operating modes— charge mode and boost mode—to allow management of system and battery power based on the state of the input.When input power is present, the device operates in charge mode. It automatically detects the battery voltage and charges the battery in the three phases: trickle current, constant current and constant voltage. Otherfeatures include charge termination and autorecharge.This device also integrates input current limit in order to manage input power and meet the priority of the system power demand.In the absence of an input source, the MP2635A switches to boost mode through the MODE pin to power the SYS pins from the battery. The OLIM pin programs the output current limit in boost mode. The MP2635A alsoallows an output short-circuit thanks to an output disconnect feature, and can auto-recover when the short circuit fault is removed.The MP2635A provides full operating status indication to distinguish charge mode from boost mode.The MP2635A achieves low EMI/EMC performance with well-controlled switching edges.To guarantee safe operation, the MP2635A limits the die temperature to a preset value 120oC. Other safety features include input overvoltageprotection, battery over-voltage protection, thermal shutdown, batterytemperature monitoring, and a programmable timer to prevent prolonged charging of a dead battery.

Features

• 4.5V-to-6V Operating Input Voltage Range
• Integrated Input-Current-Based PowerManagement Function
• Up to 2A Programmable Charge Current
• Trickle-Charge Function
• Selectable 3.6V/ 4.2V Charge Voltage with0.5% Accuracy
• Negative Temperature Coefficient Pin forBattery Temperature Monitoring
• Programmable Timer Back-Up Protection
• Thermal Regulation and Thermal Shutdown
• Internal Battery Reverse Leakage Blocking
• Reverse Boost Operation Mode for SystemPower
• Up to 91% 5V Boost Mode Efficiency @ 1A
• Programmable Output Current Limit forBoost Mode
• Integrated Short Circuit Protection for BoostMode

Typical applications

• Distributed Power Systems
• Power-Bank Applications for Smart-Phone,
• Sub-Battery Applications

More information

• Datasheet
• IC product information