Power tube driving integrated circuit

Abstract

The invention discloses a power tube driving integrated circuit. The signal input terminal of the integrated circuit is in connection with a control unit so as to receive the driving signal of driving a power tube from the control unit; and the signal output terminal of the integrated circuit is in connection with the power tube so as to connect / disconnect the power tube under the effect of the driving signal, wherein the signal input side of the integrated circuit is provided with a control earth terminal in electric connection with the ground wire of the control unit; and the signal output side is provided with a power earth terminal in electric connection with the emitter or source of the power tube. The power tube driving integrated circuit integrates discrete devices on a single IC, thereby reducing peripheral device costs, and improving the reliability of a whole machine; even more important, the signal input side and the signal output side are respectively provided with an earth port for connecting with the control unit and a driven power tube; the control earth terminal and the power earth terminal are separated, thereby effectively obtaining a smooth driving power tube conduction curve.

Description

technical field [0001] The invention relates to a driving circuit of a power tube, in particular to a power tube driving integrated circuit capable of obtaining a smooth conduction curve of the driving power tube. Background technique [0002] Power tubes (such as IGBTs, power NMOS tubes, etc.) on the market today are driven by two driving methods, one is driven by discrete devices, and the other is driven by IC integrated circuits. For the solution driven by the former discrete device, it needs to use at least three triodes and several resistors to drive the power tube, and because it is relatively scattered and the integration level is not high enough, it leads to a large PCB area occupied by it, and the device is soldered There are many dots, and the poor rate of solder joint processing is also high, which greatly affects its use in the market; for the scheme using integrated circuit drive, its driving speed is slow, the grid curve of the driving power tube is not smooth,...

AI Technical Summary

Problems solved by technology

For the solution driven by the former discrete device, it needs to use at least three triodes and several resistors to drive the power tube, and because it is relatively scattered and the integration level is not high enough, it leads to a large PCB area occupied by it, and the device is soldered There are many dots, and the poor rate of solder joint processing is also high, which greatly affects its use in the market; for the scheme using integrated circuit drive, its driving speed is slow, the grid curve of the driving power tube is not smooth, and the power There are potential safety hazards in the work of the tube, which may easily cause the power tube to burn out

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