Circuit capable of rapidly responding fault signal, and driving system

Abstract

The invention discloses a circuit capable of rapidly responding a fault signal, and a driving system. The circuit disclosed by the invention comprises a first NAND gate U11A, a second NAND gate U11C and a third NAND gate U11D; one input end of the first NAND gate U11A is used as a fault signal low-level enabling end; another input end is separately connected to one input end of the second NAND gate U11C and the output end of the third NAND gate U11D; the output end of the third NAND gate U11D is used as a fault signal uploading end; another input end of the second NAND gate U11C is used as a control enabling end; the output end of the second NAND gate U11C is used as a low-level enabling end; the output end of the first NAND gate U11A is connected with one input end of the third NAND gate U11D; and another input end of the third NAND gate U11D is used as a fault signal resetting end. The circuit capable of rapidly responding the fault signal, and the driving system disclosed by the invention have the advantages that: a driving acquisition circuit can be rapidly closed, so that a part to be driven is protected; and furthermore, the fault signal can be latched.

Description

technical field [0001] The invention relates to the field of a driver in a circuit, in particular to a circuit and a driving system for quickly responding to fault signals. Background technique [0002] In industries such as power supplies or motor drivers, the circuit structure of driving power devices is as follows: figure 1 As shown, the circuit includes a single-chip MCU, a buffer, a drive acquisition circuit, and a device to be driven. The single-chip MCU includes a first output terminal, a second output terminal and a first input terminal. The buffer includes a first input terminal, a second input terminal and a first output terminal. The driving acquisition circuit includes a first input terminal, a second input terminal, a first output terminal and a second output terminal. The first output end of the single-chip microcomputer MCU is connected with the first input end of the buffer, and the first output end of the buffer is connected with the first input end of th...

AI Technical Summary

Problems solved by technology

In such a process, once the device to be driven is short-circuited, the energy Q generated by the device to be driven is likely to burn itself

Also, if the fault signal The duration is very short, less than 100ns, and the MCU may not be able to query the fault signal In short, relying on software to realize the response of fault signals is very slow

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