MP2797 High-Accuracy Battery Monitor and Protector

MP2797 High-Accuracy Battery Monitor and Protector

The MP2797 is a robust battery management device, providing a complete analog front-end (AFE) monitoring and protection solution.

Key Specifications

Features

• Hardware Configurable Protections: o Charge/Discharge OCP and SCP o Cell UVP and OVP o Pack UVP and OVP o Cell Low-/High-Temperature Protection o Die High-Temperature Protection
• Passive Cell Balancing up to 58mA per Cell: o Can Drive External Balancing Transistors o Automatic or Manual Control
• I2C or SPI Interface with 8-Bit CRC
• Random Cell Connection Tolerant
• Available in a TQFP-48 (7mmx7mm) Package

Typical Application Circuit

Applications

• Energy Storage System (ESS)
• E-Bikes, E-Scooters
• Light Electric Vehicles (LEVs)
• Power and Gardening Tools

Design Notes

• Cell measurement accuracy is specified over temperature — calibrate the sense path if the gauge reports state of charge rather than raw voltage.
• Balance current is limited by the bleed resistor and the pack wiring; check the resulting balance time for the capacity mismatch you expect.
• Protection thresholds should sit inside the cell maker's absolute limits with margin for measurement error.
• Keep the sense lines separate from the power path to avoid IR drop corrupting readings.

Common Questions