2A Single Cell Switching Charger with Power Path Management and 1.5A BOOST OTG
The MP2635 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 MP2635 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. 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 MP2635 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 MP2635 also allows an output short-circuit thanks to an output disconnect feature, and can auto-recover when the short circuit fault is removed.
The MP2635 provides full operating status indication to distinguish charge mode from boost mode.
The MP2635 achieves low EMI/EMC performance with well-controlled switching edges.
To guarantee safe operation, the MP2635 limits the die temperature to a preset value 120oC. 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.
The MP2635 has two battery full options. MP2635: 4.2V/3.6V; MP2635B: 4.35V/4.2V.
- 4.5V-to-6V Operating Input Voltage Range
- Power Management Function Integrated Input-Current Limit and Input-Voltage Regulation
- Up to 2A Programmable Charge Current
- Trickle-Charge Function
- Selectable Charge Voltage with 0.5% Accuracy: 3.6V/4.2V(MP2635) or 4.35V/4.2V(MP2635B)
- Negative Temperature Coefficient Pin for Battery Temperature Monitoring
- Programmable Timer Back-Up Protection
- Thermal Regulation and Thermal Shutdown
- Internal Battery Reverse Leakage Blocking
- Reverse Boost Operation Mode for System Power
- Up to 91% 5V Boost Mode Efficiency @ 1A
- Programmable Output Current Limit for Boost Mode
- Integrated Short Circuit Protection for Boost Mode
- Operating Vin (min) (V)4.2
- Operating Vin (max) (V)6.5
- Absolute Vin (max) (V)20
- Vbatt (max) (V)4.35
- Vbatt (min) (V)4.2
- Battery TypeLi-Ion, Li-Polymer
- Iotg (A)1.5
- Iin (max) (A)3
- Icharge (max) (A)2
- Votg (max) (V)5
- fsw (kHz)1200/600
- Control InterfaceStandalone
- Special FeaturesBatt NTC Monitor, Input Bypass Power Path, Input Current Regulation, Power Bank Output Mode, Thermal Regulation, USB Compatible, USB OTG (Boost Mode), VIN Regulation
- PackageQFN-24 (4x4)
- NTC MonitoringYes
- EN ControlNo
- Charge Status Yes