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Monolithic Power Systems
USB PD Buck-Boost Charger - MP2651
MP2651
I2C-Controlled, USB PD 6A Buck-Boost Charger with OTG/Source Mode for 1-Cell to 4-Cell Series Battery Applications
Description
The MP2651 is a buck-boost charger IC designed for battery packs with 1 cell to 4 cells in series. It can accept a wide 4V to 22V input voltage (VIN) range to charge the battery. The buck-boost topology allows the battery voltage (VBATT) to be above or below VIN.While the input is present, the MP2651 operates in charge mode. It measures VBATT and charges the battery with four phases: constant current trickle charge, constant current pre-charge, constant-current fast charge, and constant voltage charge. Other features include charge termination and auto-recharge.
The MP2651 integrates the input current (IIN) limit and VIN limit to avoid overloading the input power source. This is compliant with USB and PD specifications. In source mode, the device can supply a wide 3V to 21V VIN range, and has an output current (IOUT) limit with a high resolution.
The I2C/SMBus interface can configure the charge and discharge parameters in source mode: IIN limit, VIN limit, charge current, battery-full regulation voltage, output voltage (VOUT), and IOUT. The device can also use the registers to provide information on statuses and faults. Full protection features include input over-voltage protection (OVP), battery OVP, CFLR OVP, thermal shutdown, and a configurable timer to prevent prolonged charging of a dead battery. The device also limits the die temperature to a configurable threshold to guarantee safe operation.
The MP2651 is available in a TQFN-30 (4mmx5mm) package.
Features & Benefits
- Buck-Boost Charger for 1-Cell to 4-Cell Series Battery Packs
- 4V to 22V Operating Input Voltage (VIN) Range
- Up to 26V Sustainable Voltage, or Up to 28V with an External MOSFET
- Smooth Transitions Between Buck and Buck-Boost Mode
- Configurable Maximum Input Current (IIN) Limit
- Configurable Minimum VIN Limit
- Up to 6A Configurable Charge Current
- Configurable Battery-Full Voltage Up to 4.67V/Cell with 0.5% Accuracy
- Output Compatible with USB PD 3.0 Source Mode
- Configurable 3V to 21V Output Voltage (VOUT) with 20mV/Step
- Up to 6A Output Current (IOUT) with 50mA/Step
- 500kHz to 1.2MHz Configurable Switching Frequency (fSW)
- I2C/SMBus Host Control Interface to Support Flexible Parameter Setting
- Input Power Source Status Indicator
- Integrated 10-Bit ADC for Monitoring in Both Charge Mode and Source Mode
- Analog Output Pin for Monitoring Charge Current
- Input Over-Voltage Protection (OVP)
- Battery OVP
- Output Short-Circuit Protection (SCP) in Source Mode
- Battery Missing Detection
- NTC Pin Floating Detection
- Integrated N-Channel MOSFET Driver for Input Power Pass-Through or OVP
- Configurable JEITA for Battery Temperature Protection
- Thermal Regulation and Thermal Shutdown
- Available in a TQFN-30 (4mmx5mm) Package
*MPS Authorized Distributor
