MPF42791

2 to 16 Stacked Cells Battery Pack Fuel Gauge with Resistance Detection and Thermal Model

Description

The MPF42791 is a drop-in solution that provides comprehensive status information on lithium-ion battery strings up to 16 series cells. The MPF42791 estimates the internal state-of-charge (SOC) and state-of-health (SOH) for each cell, as well as the full pack. The MPF42791 also determines impedance, remaining runtime, charge time, and instantaneous available power. On-board memory enables the lifetime logging of key parameters.

The MPF42791 is simple to use and supports a variety of lithium cell chemistries and cell sizes. A few basic configurations allow for quick set-up, and advanced configuration capabilities can fine-tune the device for specific applications.

When paired with an MP279x battery monitor, the MPF42791 can achieve SOC accuracy within 2.5% across the temperature range. The MPF42791 can also be paired with other analog front-end (AFE) or battery stack monitors. The 400kHz I²C interface provides standard, robust communication. The 5-level LED drivers provide a simple, cost-effective charge level indicator for the device.

The MPF42791 is available in a TQFN-32 (4mmx4mm) package

Features & Benefits

Compatible with Commonly Used Battery Monitors for Up to 16 Series Cells:
- ±2.5% State-of-Charge (SOC) Accuracy when Paired with MP279x Battery Monitors
Provides Critical Battery Information:
- Pack and Cell SOC
- Pack and Cell State-of-Health (SOH)
- Remaining Runtime and Charge Time
- Instantaneous Available Power
Supports a Wide Variety of Lithium Cells
Adaptive Learning Can Be Enabled to:
- Refine Initial Charge Settings
- Refine Initial Discharge Settings
- Update Individual Cells’ State-of-Health (SOH) to Track Degradation
- Update Equivalent Series Resistance (ESR) to Track Degradation
Provides Lifetime Logging
Supports 5-Level LED SOC Indicator with Push-Button Trigger
2.5V Minimum Supply Voltage
Low Current Consumption: 6μA in Disabled Mode and 135μA (Average) in Operating Mode during Rest
Supports Up to 400kHz I²C with CRC for Robust Communication
Available in a Compact TQFN-32 (4mmx4mm) Package
Available in Turn-Key MPS BMS Module:
- MBM1xS-P50-B and MBM1xS-P100-B