Solid-state circuit breaker with negative temperature coefficient temperature data acquisition

A solid-state circuit breaker with negative temperature coefficient NTC temperature data acquisition, wherein the solid-state circuit breaker comprises:

• a plurality of first NTC temperature data acquisition circuits, each of the plurality of first NTC temperature data acquisition circuits is connected with an input end and an output end of power supply terminals and is configured to acquire a first resistance value indicating temperature data of the power supply terminals;
• a plurality of second NTC temperature data acquisition circuits, each of the plurality of second NTC temperature data acquisition circuits is connected to both ends of switches and is configured to acquire a second resistance value indicating temperature data of the switches;
• a voltage follower, the input end of the voltage follower is connected with the second NTC temperature data acquisition circuit and the voltage follower is configured to output a voltage value corresponding to the second resistance value;
• a voltage/frequency V/F conversion circuit, an input end of the V/F conversion circuit is connected with an output end of the voltage follower, and the V/F conversion circuit is configured to output an amplitude-frequency converted voltage value;
• an isolator, an input end of the isolator is connected with an output end of the V/F conversion circuit, the isolator is configured to output a digitally isolated voltage value;
• and
• a microcontroller MCU, connected to the first NTC temperature data acquisition circuit and the isolator, and performs on-off of the switches based on the first resistance value and the digitally isolated voltage value.