MP2637 2.5A Single Cell Switch Mode Battery Charger with Power Path Management (PPM) and 2.4A Boost Current with Trickle Timer The Future of Analog IC Technology DESCRIPTION FEATURES Up to 16V Sustainable Input Voltage The MP2637 is a highly-integrated, flexible, 4.5V-to-6V Operating Input Voltage Range switch-mode battery charger with system power Power Management function, Integrated path management, designed for single-cell Li- ion or Li-Polymer batteries used in a wide range Input-Current Limit, Input Voltage Regulation of applications. Up to 2.5A Programmable Charge Current The MP2637 can operate in both charge mode Trickle-Charge Function and boost mode to allow full system and battery Selectable 4.2V/ 4.35V Charge Voltage with power management. 0.5% Accuracy When input power is present, the device Negative Temperature Coefficient Pin for operates in charge mode. It automatically Battery Temperature Monitoring detects the battery voltage and charges the Programmable Timer Back-Up Protection battery in three phases: trickle current, constant Thermal Regulation and Thermal Shutdown current and constant voltage. Other features Internal Battery Reverse Leakage Blocking include charge termination and auto-recharge. Integrated Over Voltage Protection and This device also integrates both input current Over Current Protection for Pass-Through limit and input voltage regulation in order to Path manage input power and meet the priority of the Reverse Boost Operation Mode for System system power demand. Power In the absence of an input source, the MP2637 Up to 2.4A Programmable Output Current switches to boost mode through the MODE pin Limit for Boost Mode to power the SYS pins from the battery. The Integrated Short Circuit Protection and OLIM pin programs the output current limit in Output Over Voltage Protection for Boost boost mode. The MP2637 also allows for output Mode short circuit protection to completely disconnect Safety-Related Certification: the battery from the load in the event of a short o IEC 62368-1 AK Certification circuit fault. Normal operation will recover as APPLICATIONS soon as the short circuit fault is removed. The MP2637 provides full operating status indication Sub-Battery Applications to distinguish charge mode from boost mode. Power-Bank Applications for Smart-Phone Tablet and Other Portable Devices To guarantee safe operation, the MP2637 limits o the die temperature to a preset value of 120 C. All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. Other safety features include input over-voltage MPS and The Future of Analog IC Technology are Registered Trademarks protection, battery over-voltage protection, of Monolithic Power Systems, Inc. thermal shutdown, battery temperature monitoring, and a programmable timer to prevent prolonged charging of a dead battery. MP2637 Rev. 1.05 www.MonolithicPower.com 1 11/6/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. MP2637 2.5A SINGLE CELL SW MODE BATTERY CHARGER WITH PPM AND 2.4A BOOST TYPICAL APPLICATION To 5V System R R R * 1 2 OLIM C * C2 SYS SYS FB OLIM RS1 L1* 5V Input I SW CHG V BATT I VIN BATT Q1 Q2 Q3 R4 R3 C BATT CSP Battery C IN REG Q4 BATT VSYS PWIN R5 R6 NTC Battery Voltage GND: 4.35V VB MP2637 Program High/Float: 4.2V CHG VCC ACOK C4* EN VCC BOOST MODE ISET ILIM TMR AGND PGND R C R ILIM TMR ISET *Note: 1. ROLIM CANNOT be lower than 47.5k. ROLIM is for the boost output current loop setting, and please refer to the APPLICATION INFORMATION section for details. 2. CSYS should be put as close to the SYS pin and PGND as possible. At least 22 F is recommended, and C +C2 should not be less than 44F, the ceramic is preferred and E-cap is not recommended. SYS 3. VCC cap should not exceed 100nF. Recommend 47nF or 100nF. 4. Inductor should not exceed 2.2H. Recommend 1.5 H or 2.2H. MP2637 Rev. 1.05 www.MonolithicPower.com 2 11/6/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.