High-voltage integrated circuit and semiconductor circuit

Abstract

The invention relates to a high-voltage integrated circuit and a semiconductor circuit. The high-voltage integrated circuit comprises an overcurrent protection circuit, a fault logic control circuit and an overcurrent enable circuit, the over-current protection circuit comprises an over-current detection signal input end and an over-current protection signal output end, the over-current protection signal output end is connected with the fault logic control circuit, and the fault logic control circuit is used for outputting a fault signal to an external processor of the high-voltage integrated circuit; the over-current enabling circuit comprises an over-current enabling signal input end and an electronic switch, the over-current enabling signal input end is used for being connected with an external processor of the high-voltage integrated circuit, and the over-current protection circuit is grounded through the electronic switch. The high-voltage integrated circuit supports an external processor to flexibly control the over-current protection function through the over-current enable circuit, and can effectively reduce frequent shutdown caused by fault error output in the power-on stage of the circuit.

Description

technical field [0001] The invention relates to a high-voltage integrated circuit and a semiconductor circuit, belonging to the technical field of semiconductor circuit applications. Background technique [0002] High voltage integrated circuit, HVIC (High Voltage Integrated Circuit), is an integrated circuit product used to convert MCU signals into driving signals for driving IGBT and other switching tubes. Generally speaking, HVIC integrates various basic devices such as switching tubes, diodes, voltage regulator tubes, resistors, and capacitors to form drive circuits, pulse generation circuits, delay circuits, filter circuits, overcurrent protection circuits, and overheat protection circuits. , Undervoltage protection circuit, bootstrap circuit, etc. When the HVIC is working, on the one hand, it receives the control signal from the external processor to drive the subsequent switching tubes to work; on the other hand, it also sends the relevant working status detection si...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to solve a series of problems caused by the overcurrent protection circuit in the existing high-voltage integrated circuit that is easily subject to external interference, resulting in false triggering of the fault signal output and frequent shutdown

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