Thermal Protection Circuit

摘要

A thermal protection circuit which relates to the field of electronic technologies can detect temperature of multiple locations simultaneously and adjust a preset threshold flexibly, thereby improving system reliability. The thermal protection circuit includes: at least one temperature sensor, a detection circuit, an execution circuit, a self-locking and triggering circuit, a protective temperature regulation circuit, and a power supply circuit. The at least one temperature sensor converts a temperature signal into an electrical signal and sends the electrical signal to the detection circuit; the detection circuit detects whether temperature reaches the preset threshold, and sends a turn-off signal to the execution circuit if the temperature reaches the preset threshold; the execution circuit cuts off power supply to the system; and the self-locking and triggering circuit maintains, a power-off state of the system until a power switch is triggered.

主权项

1. A thermal protection circuit, wherein the circuit comprises:
a detection circuit; an execution circuit; a self-locking and triggering circuit; and at least one temperature sensor configured to:
convert a temperature signal into an electrical signal; andsend the electrical signal to the detection circuit, wherein the detection circuit is configured to:
detect, according to the electrical signal received from the temperature sensor, whether temperature reaches a preset threshold; andsend a turn-off signal to an execution circuit when the temperature reaches the preset threshold, wherein the execution circuit is configured to cut off power supply to a system after receiving the turn-off signal from the detection circuit, and wherein the self-locking and triggering circuit is configured to maintain, after the power supply to the system is cut off, a power-off state of the system until a power switch is triggered.