Battery Fuel Gauge - High-Precision Battery Management

Renesas' battery fuel gauges provide a comprehensive single-package solution for advanced battery management systems. By integrating a microcontroller (MCU) and an analog front end (AFE), these solutions ensure constant monitoring of battery state, delivering exceptional safety, accuracy, and efficiency for a wide range of applications.

Accurate Voltage & Current Monitoring

Independent A/D converters deliver precise, simultaneous measurements for voltage, current, and temperature, ensuring reliable battery performance.

Built-In Safety & Reliability

Integrated FET protection and redundant fault detection by both the MCU and AFE safeguard against overcurrent, short circuits, and other critical failures.

Streamlined Integration for Industrial Use

Features like a CAN interface and RTC enable seamless integration into industrial systems, while lifecycle limit settings and robust data flash ensure long-term reliability.

Cost-Effective Design

N-channel FET drivers and integrated pull-up resistors reduce component count, lowering system costs without compromising performance.

Maximized Battery Life

Low power mode (<25 µA) and cell balancing technology optimize battery capacity and extend operational life.

Single Package Solution

Dedicated single-package solution with MCU and AFE provides an intelligent, programmable system for battery management that constantly monitors and protects the battery.

Enhanced Safety Features

Built-in self-diagnostic functions for both the MCU and AFE.
Low power mode for safe and prolonged storage.
Comprehensive protection against over/under voltage, overcharge/discharge current, short circuits, and extreme temperatures.

Unmatched Accuracy

High-precision delta-sigma A/D converter for precise current, voltage, and temperature detection.
Advanced battery level calculations that account for battery deterioration, ensuring reliable performance over time.

Battery Functional Safety

Renesas’ battery management solutions prioritize (non-automotive) functional safety, ensuring reliable performance and protection in critical applications. With advanced features like fuel gauging and fault detection, they support compliance with safety standards for robust, efficient designs.

Learn More