MPF42790
High-accuracy battery fuel gauge with impedance tracking technology for precise SOC and SOH reporting in Li-ion applications.
Product Overview
Description
The MPF42790 uses advanced impedance tracking technology to provide accurate battery state-of-charge (SOC) and state-of-health (SOH) measurements. Unlike simple voltage-based methods, impedance tracking accounts for battery aging, temperature, and load conditions for ±3% accuracy across the battery lifetime.
The device integrates a precision ADC for voltage, current, and temperature measurements. Integrated current sensing eliminates external sense resistors in some applications. The I2C interface provides real-time battery status including remaining capacity, runtime, cycle count, and health status.
Advanced features include battery authentication for safety, automatic calibration, and low-power operation. The MPF42790 is ideal for smartphones, tablets, power tools, and any application requiring accurate battery status reporting.
Product Series
MPF
Primary Application
Smartphones
Key Features
- ±3% SOC accuracy
- Impedance tracking
- Integrated current sense
- Battery authentication
- Tiny WLCSP package
Specifications
| Battery Type | Li-ion/Li-polymer |
|---|---|
| SOC Accuracy | ±3% |
| Voltage Range | 2.5V to 4.5V |
| Current Sensing | Integrated or external |
| Operating Temperature | -40°C to +85°C |
| Package | WLCSP-9 (1.6mm x 1.6mm) |
Applications
Smartphones
Electronic system design
Tablets
Electronic system design
Power tools
Electronic system design
E-bikes
Electronic system design
Portable medical
Medical electronics
FAE Expert Insights
"The MPF42790 provides the most accurate battery monitoring I've seen in this price range. The impedance tracking technology really works - I've measured ±2-3% accuracy across temperature and aging, compared to ±10-15% for voltage-based methods. The integrated current sense eliminates external components in many applications. The battery authentication is a nice security feature. I2C interface is easy to use with good documentation. The tiny WLCSP package is perfect for space-constrained designs. For any application where accurate battery status is important - smartphones, power tools, medical devices - this fuel gauge is an excellent choice."
High-accuracy fuel gauge with ±3% SOC using impedance tracking technology
— Lisa Zhang, BeiLuo
Frequently Asked Questions
How does impedance tracking compare to coulomb counting?
Impedance tracking combines voltage measurement with impedance modeling for superior accuracy. Benefits: Accounts for battery aging and temperature automatically. No full discharge calibration needed. Works with varying loads. Coulomb counting integrates current over time. Benefits: Simple implementation. Good short-term accuracy. Trade-offs: Requires periodic full discharge calibration. Accumulates error over time. Impedance tracking provides better long-term accuracy with less maintenance.
Use MPF42790 impedance tracking for best accuracy and lowest maintenance.