Monolithic Power Systems, a leading company in high-performance power solutions, has unveiled the MPF42793, a 2 to 16-stacked lithium-ion phosphate cells battery pack fuel gauge. It is a drop-in solution that provides comprehensive status information on lithium iron phosphate (LFP or LiFePO4) battery strings up to 16 cells in series. The MPF42793 estimates the internal state of charge (SOC) and state of health (SOH) for each cell, as well as the full pack. The MPF42793 also determines the impedance, remaining runtime, charge time, and instantaneous available power. Onboard memory enables the lifetime logging of key parameters.

The MPF42793 is simple to use and supports a variety of cell sizes. A few basic configurations allow for quick set-up, and advanced configuration capabilities can fine-tune the device for specific applications.

The MPF42793 can be paired with any analog front-end (AFE) or battery stack monitors. The 400 kHz digital interface provides standard, robust communication. The 5-level LED drivers provide a simple, cost-effective charge level indicator for the device.

The MPF42793 is available in a TQFN-32 (4 mm x 4 mm) package.

Key features and benefits

• Compatible with Commonly Used Battery Monitors for Up to 16 Series Cells
• Provides Critical Battery Information:
• Pack and Cell State-of-Charge (SOC)
• Pack and Cell State-of-Health (SOH)
• Remaining Runtime and Charge Time
• Instantaneous Available Power
• Optimized for Lithium Iron Phosphate (LFP) Batteries
• Adaptive Learning Can be Enabled to:
• Refine Initial Charge Settings
• Refine Initial Discharge Settings
• Update Individual Cells’ 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
• 2.5 V Minimum Supply Voltage
• Low Current Consumption: 6 μA in Disabled Mode and 135 μA (Average) in Operating Mode during Rest
• Supports Up to 400 kHz Digital Interface with CRC for Robust Communication
• Available in a Compact TQFN-32 (4 mm x 4 mm) Package