LTC4041IUFD#PBF

Battery Management Overview

The LTC4041IUFD#PBF is a complete supercapacitor backup system designed for 2.9 V to 5.5 V power rails. It integrates a high-current buck DC/DC converter for charging single or dual series supercapacitors and a boost regulator for providing backup power during input loss. The device features an adjustable input current limit, prioritizing system load over charging current, and includes an internal supercapacitor balancer.

Battery Management Feature Summary

• Integrates a 2.5 A buck charger and a 2.5 A boost backup regulator within a single package.
• Features an internal supercapacitor balancing circuit that maintains equal voltage across cells without external resistors.
• Provides automatic seamless switching to backup mode when the input supply drops below the programmable PFI threshold.

Battery Management Applications

• Electric meters
• Industrial alarms
• Dying gasp power supplies

Battery Management Procurement Notes

Verify component authenticity through authorized Analog Devices distributors. Confirm RoHS compliance status via official documentation. Ensure storage conditions align with manufacturer guidelines to maintain reliability. Validate pinout compatibility with target PCB layout before integration.

Battery Management Selection Notes

Select this component for applications requiring reliable supercapacitor-based backup in compact spaces. The integrated balancer simplifies design for dual-cell configurations. Verify that the input voltage range of 2.9 V to 5.5 V matches the system requirements. Consider the thermal performance under maximum load conditions.

Battery Management Part Context

This part belongs to the LTC4041 family of supercapacitor power managers from Analog Devices. It is specifically engineered for systems needing uninterrupted power during main supply failures. The IUFD suffix indicates the industrial temperature grade and QFN-24 package type.

Battery Management Replacement Considerations

No direct public substitutes are documented. Evaluate alternative PMICs based on similar current ratings and supercapacitor management capabilities. Ensure functional equivalence in backup switching logic and balancing features.

Battery Management FAQ

How does the LTC4041 handle supercapacitor voltage balancing?

It utilizes an internal balancing circuit that automatically maintains equal voltage across individual supercapacitors without requiring external resistors.

What happens when the input power fails?

The device automatically switches to backup mode, using the boost regulator to provide power from the supercapacitors to the system output seamlessly.