MP2637 Datasheet | Monolithic Power Systems

DESCRIPTION The MP2637 is a highly-integrated, flexible, switch-mode battery charger with system power path management, designed for single-cell Liion or Li-Polymer batteries used in a wide range of applications. The MP2637 can operate in both charge mode and boost mode to allow full system and battery power management. When input power is present, the device operates in charge mode. It automatically detects the battery voltage and charges the battery in three phases: trickle current, constant current and constant voltage. Other features include charge termination and auto-recharge. This device also integrates both input current limit and input voltage regulation in order to manage input power and meet the priority of the system power demand. In the absence of an input source, the MP2637 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 MP2637 also allows for output short circuit protection to pletely disconnect the battery from the load in the event of a short circuit fault. Normal operation will recover as soon as the short circuit fault is removed. The MP2637 provides full operating status indication to distinguish charge mode from boost mode. To guarantee safe operation, the MP2637 limits the die temperature to a preset value of 120o C. Other safety features include input over-voltage protection, battery over-voltage protection, thermal shutdown, battery temperature monitoring, and a programmable timer to prevent prolonged charging of a dead battery. FEATURES - Up to 16V Sustainable Input Voltage - 4.5V-to-6V Operating Input Voltage Range - Power Management function, Integrated Input-Current Limit, Input Voltage Regulation - Up to 2.5A Programmable Charge Current - Trickle-Charge Function - Selectable 4.2V/ 4.35V Charge Voltage with 0.5% Accuracy - Negative Temperature Coefficient Pin for Battery Temperature Monitoring - Programmable Timer Back-Up Protection -...