DESCRIPTION
The MPF42791 is a drop-in solution to provide
comprehensive status information on lithium-ion
battery strings up to 16 series cells. The
MPF42791 estimates the internal state-ofcharge
(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
• Compatible with Commonly Used Battery
Monitors for Up to 16 Series Cells
o ±2.5% State-of-Charge (SOC) Accuracy
when Paired with MP279x Battery
Monitors
• Provides Critical Battery Information:
o Pack and Cell SOC
o Pack and Cell State-of-Health (SOH)
o Remaining Runtime and Charge Time
o Instantaneous Available Power
• Supports a Wide Variety of Lithium Cells
• Adaptive Learning Can Be Enabled to:
o Refine Initial Charge Settings
o Refine Initial Discharge Settings
o Update Individual Cells’ State-of-Health
(SOH) to Track Degradation
o 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:
o MBM1xS-P50-B and MBM1xS-P100-B

APPLICATIONS
• Light EVs: Scooters, Bikes, and Golf Carts
• Energy Storage: Uninterruptable Power
Supplies (UPS) and Renewable Energy
• Industrial Robots, Floor Cleaners, and
Forklifts
• Cordless Tools and Gardening Equipment