MP2787 High-Accuracy Battery Monitor

MP2787 High-Accuracy Battery Monitor

The MP2787 is a robust battery management device, providing a complete analog front-end (AFE) monitoring.

Key Specifications

Features

• 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 Cyclic Redundancy Check (CRC)
• Random Cell Connection Tolerant
• Available in a TQFP-48 (7mmx7mm) Package

Typical Application Circuit

Applications

• Power and Gardening Tools
• E-Bikes and E-Scooters
• Battery Backups and Uninterruptable Power Supplies (UPS)

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