MP2791

The MP2791 is a robust battery management device, providing a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-series cell battery management systems (BMS). The MP2791 supports connections for 7-cell to 16-cell in series battery packs, with an absolute voltage exceeding 75V on particular pins.

The device supports I²C or SPI communication. 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 temperature via an external NTC thermistor. The second ADC measures the charge/discharge current via an external sense resistor.

The MP2791 has high-side drivers and features robust protection functions, such as over-current protection (OCP), short-circuit protection (SCP), battery under-voltage protection (UVP), battery over-voltage protection (OVP), and low/high-temperature protection. All of the protections have configurable thresholds.

Integrated balancing FETs equalize mismatched cells, with the option to drive the external balancing FETs. The MP2791 features an internal autonomous state machine that leverages the ADC to ensure monitoring of the cell safe operating area, according to the configured thresholds.

The MP2791 has an optimized baseline current consumption that depends on the operating mode. For applications requiring compliance with IPC 2221B or UL 60950-1, conformal coating might be required depending on the pack voltage.

The MP2791 is available in a TQFP-48 (7mmx7mm) package.