MP2672 Boost Charger with Cell Balance for 2-Cell Series Lithium-Ion Battery DESCRIPTION FEATURES The MP2672 is a highly integrated, flexible 4.0V to 5.75V Input Operation Voltage switch-mode battery charger IC for a Lithium-ion Up to 14V Sustainable Voltage battery with two cells in series, which is used in Up to 2A Programmable Charge Current for a wide range of portable applications. Battery with 2 Cells in Series Compatible with Host Control and When the input power supply is present, the Standalone Mode MP2672 operates in boost mode to charge the NVDC Power Path Management battery with two cells in series. When charging is Programmable Input Voltage Limit enabled, the MP2672 automatically detects the Programmable Charge Voltage with 0.5% battery voltage and charges the battery in three Accuracy phases: pre-charge, constant-current charge, and constant-voltage charge. Other features No External Sense Resistor Required include charge termination and auto-recharge. Integrated Cell Balancing Circuit for Cell Mismatch The MP2672 also has a narrow voltage DC Preconditioning for Fully Depleted Battery (NVDC) power structure. When the battery is Flexible New Charging Cycle Initiation weak, the MP2672 regulates the system output Charging Operation Indicator in Standalone at the minimum voltage level to power the Mode system instantly and charge the battery via the Missing Battery Detection battery FET simultaneously. 2 I C Port for Flexible System Parameter The MP2672 also has cell balance function. It Setting and Status Reporting in Host monitors the voltage across each cell and Control Mode equalizes cell voltages once the difference Negative Temperature Coefficient Pin for exceeds the mismatch threshold. Temperature Monitoring Compliant with The MP2672 has two configuration modes: JEITA Standards standalone mode and host control mode. In Built-In Charging Protection and standalone mode, the charging parameters can Programmable Safety Timer be configured by the hardware pins. In host MOSFET Cycle-by-Cycle Over-Current control mode, the charging parameter can be Protection 2 configured by the I C registers. Thermal Regulation and Thermal Shutdown Available in a QFN-18 (2mmx3mm) The MP2672 has diversified and robust Package protections. It has a thermal regulation loop to decrease the charge current if the junction APPLICATIONS temperature exceeds the thermal loop threshold. Portable Handheld Solutions It also has battery temperature protection POS Machines compliant with JEITA standards. Other safety Bluetooth Speakers features include input over-voltage protection, E-Cigarettes battery over-voltage protection, thermal shutdown, battery temperature monitoring, a General 2-Cell Applications watchdog timer, and a programmable back-up All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For timer to prevent prolonged charging of a dead MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are registered trademarks of battery. Monolithic Power Systems, Inc. or its subsidiaries. MP2672 Rev. 1.0 www.MonolithicPower.com 1 7/17/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. MP2672 2-CELL LI-ION OR LI-POLYMER BOOST SWITCHING CHARGER TYPICAL APPLICATION Standalone Mode: Connect the CV pin to AGND via a resistor. Set the battery-full voltage according to Table 1. Table 1: Battery Voltage Settings R Range V VBATT BATT REG 30k to 35k 8.4V 70k to 75k 8.6V 100k to 105k 8.7V 130k to 135k 8.8V SYS BST Q2 Q3 BATT L1 VIN SW Q1 C BATT IN C IN R H VLIM MID R MP2672 L ACOK VCC STAT VCC R T1 AGND CV NTC ISET R T2 R VBATT R ISET PGND R NTC MP2672 Rev. 1.0 www.MonolithicPower.com 2 7/17/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.