MP2639C 2-Cell Li-Ion or Li-Polymer Switching Charger Compatible with 5V Input and Integrated, Bidirectional Charge/Discharge with Cell Balance DESCRIPTION FEATURES The MP2639C is a highly integrated, flexible, 4.0V to 5.75V Input Voltage Range switch-mode, battery-charging management Charge 2-Cell Batteries with 5V Input device for 2-cell series Li-ion and Li-polymer USB-Compliant Charger batteries used in a wide range of portable Integrates Input Current-Based and Input applications. Voltage-Based Power Management Functions The MP2639C is able to charge a 2-cell battery Programmable Input Current and Input from a 5V adapter or USB input. The MP2639C Voltage Limit can work in three modes: charge mode, Up to 2.5A Programmable Charge Current discharge mode, and sleep mode. for 2-Cell Applications In 2-cell applications, the 5V input charges the 8.4V Charge Voltage with 0.5% Accuracy 2-cell battery via the MP2639C operating in Up to 5.0A Programmable Discharge step-up mode. When the 5V input is absent, the Current 2-cell battery voltage is discharged to the 5V Negative Temperature Coefficient Pin for output via the MP2639C working in step-down Temperature Monitoring mode. No Load Shutdown and Push Button Turn- For the charging function, the MP2639C detects On in Discharge Mode the battery voltage automatically and charges Programmable Timer Back-Up Protection the battery in three phases: trickle current, Discharge Mode Load Trace Compensation constant current, and constant voltage. Other Thermal Regulation and Thermal Shutdown features include charge termination and auto- Internal Battery Reverse Leakage Blocking recharge. Integrated Short-Circuit Protection (SCP) for To guarantee safe operation, the MP2639C Both Charge and Discharge Mode limits the die temperature to a preset value of Four LED Battery Level and Status 120C. Other safety features include input over- Indicators voltage protection (OVP), battery over-voltage Available in a QFN-26 (4mmx4mm) protection (OVP), thermal shutdown, battery Package temperature monitoring, and a programmable APPLICATIONS timer to prevent prolonged charging of a dead Power Station Applications battery. Power Bank Applications for Smart Phones, The MP2639C is available in a QFN-26 Tablets, and Other Portable Devices (4mmx4mm) package. Mobile Internet Devices All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MP2639C Rev. 1.01 MonolithicPower.com 1 10/31/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. MP2639C 5V, 2.5A, BOOST CHARGER WITH 5V, 5A INVERTED DISCHARGE TYPICAL APPLICATION 2-Cell Application Charge Mode VL L1 R2 R1 FB BST SW LX Q Q1 RB 5V Input VH V BATT VL C VH Q2 MID R3 C VL Battery ACOK NTC VLIM MID VNTC VCC MP2639C PB OLIM MODE IB ILIM VCC LED1 ISET LED2 TMR LED3 LED4 C R R R C R4 TMR ISET ILIM OLIM VCC CHGOK AGND PGND 2-Cell Application Discharge Mode R2 R1 FB BST SW LX Q RB Q1 5V Output VH V BATT VL C VH Q2 MID R3 CVL Battery ACOK MID NTC VLIM VNTC VCC MP2639C PB OLIM MODE IB ILIM VCC LED1 ISET LED2 TMR LED3 LED4 C R R R C R4 TMR ISET IILIM OLIM VCC CHGOK AGND PGND Adapter BATT Active MODE CHG/DSG Topology Term Term SW High DSG Q1 Step-down VL VH Low CHG Q2 Step-up MP2639C Rev. 1.01 MonolithicPower.com 2 10/31/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved.