Over-temperature protection circuit and system

Abstract

The invention discloses an over-temperature protection circuit and system, the over-temperature protection circuit comprises: a voltage generating module configured to set at least one level of over-temperature protection trigger point voltage, and output the trigger point voltage through a first output end; an operation module configured to obtain a reference voltage according to the received atleast one level of trigger point voltage and a feedback voltage, wherein a first input end is electrically connected with the first output end, and the at least one level of trigger point voltage is input by the first input end, and the feedback voltage is obtained based on a detected temperature of the over-temperature protection circuit; and a logic signal generating module configured to generate a logic signal according to the received reference voltage to control other devices to work, therefore the over-temperature protection circuit provided by the embodiment of the invention has at least one over-temperature protection trigger point, and a current curve can be dynamically adjusted in a process of triggering over-temperature protection, so that the over-temperature protection circuitcan be flexibly adapted to different application environments and meet the application requirements of products with over-temperature protection requirements in different application environments.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to an over-temperature protection circuit and system. Background technique [0002] Over-temperature protection is an important protection function in circuit applications. Products that require over-temperature protection will design corresponding over-temperature protection circuits. [0003] The existing over-temperature protection circuit has an over-temperature protection trigger point, which includes a temperature detection module. When the sampled circuit operating temperature reaches the over-temperature protection trigger point, it will start or trigger the over-temperature protection mechanism, thereby sending out an over-temperature protection signal or instruction, so that the product can choose to limit the current or shut down according to the over-temperature protection signal or instruction System and other ways to limit protection. [0004] However, the over-temp...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an over-temperature protection circuit and system, which is used to solve the problem that the existing over-temperature protection circuit cannot meet the application requirements of products in different application environments

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