eFuses are integrated power path protection devices that are used to limit circuit currents, voltages to safe levels during fault conditions. eFuses offer many benefits to the system and can include protection features that are often difficult to implement with discrete components. Discrete solutions are bulky, inefficient, do not incorporate thermal protection, need more components and occupy more board space. More components also raise concerns on protection-circuit robustness and reliability.
Different types of eFuses are available in the market. Here
is one of my favorite eFuses, TPS259271 from TI.
This chip is a robust defence against overloads, shorts
circuits, voltage surges, excessive inrush current, and reverse current. It
also offers Controlled Power Down, Over Temperature Protection, Health
Monitoring and Reporting.
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