The MP2797 is a robust battery management device, providing a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-cell series battery management systems (BMS). This device supports I2C or SPI communication. It supports connections for 7-cell to 16-cell series battery packs, with an absolute voltage exceeding 80V on particular pins.
The MP2797 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltages (up to 16 channels), die temperature, and 4-channel temperature via an external NTC thermistor. The second ADC measures the charge/discharge current via an external current-sense resistor.
The device 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 high/low-temperature protection. All of the protections have configurable thresholds.
The MP2797 features an internal autonomous state machine that leverages the ADC to ensure monitoring of the cell safe operating area, according to the configured thresholds. It also integrates the balancing FETs to equalize the mismatched cells with the option to drive the external balancing FETs.
It 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 may be required depending on the pack voltage.
The MP2797 is available in a TQFP-48 (7mmx7mm) package.