MP2791DFP

The MP2791 is a robust battery management device that provides a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-cell series battery management systems (BMS). The device can support I2C or SPI communication. It supports connections for 7-cell to 14-cell series battery packs, with an absolute voltage exceeding 75V on particular pins. The MP2791 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltages (up to 14 channels), die temperature, and 4-channel temperatures via external negative temperature coefficient (NTC) thermistors. The second ADC measures the charge/discharge current via an external current-sense resistor. The dual ADC architecture enables synchronous voltage and current measurements for cell and pack impedance monitoring. When paired with an MPF4279x fuel gauge, the MP2791 can achieve a state-of-charge (SOC) error to within 2%. The MP2791 includes high-side MOSFET (HS-FET) drivers for charge and discharge control. The discharge (DSG) MOSFET driver includes a configurable soft start (SS) that provides a controlled turn-on, eliminating the need for an external pre-charge circuit. The MOSFET drivers also incorporate over-current protection (OCP), short-circuit protection (SCP), battery under-voltage protection (UVP), battery over-voltage protection (OVP), and high-temperature/low-temperature protection. All of these protections have configurable thresholds. Internal passive balancing MOSFETs can be used to equalize mismatched cells, supporting up to 58mA. There is also the option to drive external balancing transistors (MOSFET or BJT). The MP2791 is available in a TQFP-48 (7mmx7mm) package.