eFuses serve as integrated power path protection devices designed to limit circuit currents and voltages to safe levels during fault conditions. These components offer numerous advantages to the system, including protection features that can be challenging to implement using discrete components. In contrast, discrete solutions tend to be bulky, inefficient, and lack thermal protection, necessitating more components and occupying additional board space. These factors can raise concerns about the robustness and reliability of protection circuits.
While various types of eFuses are available in the market, I particularly favour TPS259271 from TI.
This eFuse provides a robust defence against overloads, short circuits, voltage surges, excessive inrush current, and reverse current. Additionally, it offers Controlled Power Down, Over-Temperature Protection, and Health Monitoring and Reporting features.
