Active metal fuses for dc-eos and surge protection

An electronic device, comprising:

• an input;
• an output;
• a metal fuse;
• a resistor;
• and
• a heat control transistor;
• the metal fuse having a first end and a second end, the first end of the metal fuse coupled to the input, and the second end of the metal fuse coupled to the output;
• the resistor having a first terminal and a second terminal, the first terminal of the resistor coupled to the second end of the metal fuse, and the resistor thermally coupled to the metal fuse;
• and
• the heat control transistor having a first terminal and a second terminal, the first terminal of the heat control transistor coupled to the second terminal of the resistor, and the second terminal of the heat control transistor coupled to a reference terminal of the electronic device.

An electronic device, comprising:

• an input;
• an output;
• a metal fuse;
• a resistor;
• a heat control transistor;
• and
• a heat controller;
• the metal fuse coupled between the input and the output;
• the resistor coupled between the metal fuse and the heat control transistor;
• the heat control transistor coupled between the resistor and a reference terminal of the electronic device;
• and
• the heat controller configured to control a heater current of the heat control transistor.

A system, comprising:

• an electronic fuse device;
• and
• a protected integrated circuit (IC);
• the electronic fuse device comprising:
• an input;
• an output coupled to the protected IC;
• a metal fuse;
• a resistor;
• a heat control transistor;
• and
• a heat controller;
• the metal fuse coupled between the input and the output;
• the resistor coupled between the metal fuse and the heat control transistor;
• the heat control transistor coupled between the resistor and a reference terminal of the electronic fuse device;
• and
• the heat controller configured to control a heater current of the heat control transistor.