eFuse

Problems with other fuses

One Shot fuses - Contains a piece of wire which melts when there is a fault so that the flow of electricity stops

• Based on melting of a metal link
• Must be replaced after a single high current even
• ONE TIME USE

Resettable fuses - Heat up and transition from a low resistance state to a high resistance state during a fault. They can be reset by removing power

• Not good at maintaining voltage levels
• Not the quickest at responding to faults
• Only prevents against overcurrent
• Degrades after each fault

eFuses - Limit circuit currents, voltages to safe levels during fault conditions

eFuses provide greater protection to faults than traditional fuses.

• Protects against:
• Inrush current
• Overcurrent
• Overvoltage
• Reverse current
• Reverse polarity
• Short circuit faults

eFuse pinout:

• Customizable fault time and current limit
• CT: Capacitor to ground sets fault time   
• ISET: Resistor to ground sets current limit

More information:

Basics of eFuses (ti)

How to achieve active circuit protection using eFuses