MPF42791: Battery Fuel-Gauge ICs for Lithium-Ion Batteries
MPS – Measuring State of Charge and Health
The MPF42791 from Monolithic Power Systems (MPS) is a high-precision IC for accurate determination of battery state of charge. The device provides comprehensive status information for lithium-ion battery packs with up to 16 cells. In addition to reliably calculating the State of Charge (SoC), the MPF42791 also monitors the State of Health (SoH) of each individual cell.
Download DatasheetExact State Determination Through Mathematical Model
For accurate state estimation, MPS uses a proprietary mathematical model that considers multiple cell-specific parameters, including open-circuit voltage, diffusion voltage, series resistance, and voltage hysteresis. By combining these factors, the IC achieves significantly more accurate predictions compared to conventional methods. Based on this model, the MPF42791 can not only calculate the remaining runtime but also determine the currently available power of the entire battery pack – even under low or high ambient temperatures.
Custom Programming
The IC is suitable for a wide range of lithium-ion cells. Programming is done custom by MPS, making this solution particularly suitable for products with higher production volumes. The underlying mathematical model leverages MPS’ extensive proprietary database, which contains detailed characterizations of numerous commercially available battery cells. In combination with the MP279x battery monitor, accuracies better than ±2.5% can be achieved across the full temperature range.
Main Features of the MPF42791
- Connection of 2-16 Li-ion cells, programmable for different cell chemistries (via MPS)
- Synchronous voltage and current measurement on each cell for more accurate SoH determination
- 48KB flash memory to store battery parameters throughout its entire service life
- I2C interface
- Driver for a 5-stage LED charge status indicator
- Low quiescent current of 6uA (disabled mode)
- 4x4mm TQFN-32 housing
Applications
- Light electric vehicles: e-scooters, e-bikes, golf carts
- Energy storage: uninterruptible power supply (UPS) and renewable energies
- Industrial robots, floor cleaning machines, logistics vehicles
- Battery-powered tools and garden equipment
What are the Benefits of an Intelligent Battery Fuel-Gauge IC for Battery-Powered Applications?
For a wide range of battery-powered applications, where precise prediction of remaining runtime, detailed monitoring of each individual cell, or reliable delivery of high power under varying temperature conditions is required, an intelligent battery fuel-gauge IC provides an ideal solution.
Your Contact Person
Do you need precise battery fuel-gauge ICs for your project? Contact Thomas Merkel.
