Current triggering type detonation integrated circuit applied to electronic safety system

Abstract

The invention provides a current triggering type detonation integrated circuit applied to an electronic safety system. The current triggering type detonation integrated circuit comprises a PCB substrate circuit, an internal insulation packaging layer surrounding the PCB substrate circuit, an external metal shielding layer and an external lead layer. The external lead layer is connected with pins of the internal PCB substrate circuit, and the pins comprise a current anode input end I +, a current cathode output end I-, a power supply pin VCC, a grounding pin GND and a high-voltage end VCCH; the PCB substrate circuit is integrated with a current detection module, a differential amplification module, a high-voltage switch module, a current positive electrode end, a current negative electrode end and a high-voltage end. According to a packaging method, the influence of direct external interference on the internal circuit can be greatly reduced; and compared with a detonation circuit triggered by a level, the detonation circuit provided by the invention has the advantages that a current-triggered detonating mode is realized; and when the voltage of the current positive electrode end and the voltage of the current negative electrode end are voltage signals, the detonation circuit does not detonate, and the problem of false triggering caused by externally input interference level is avoided.

Description

technical field [0001] The invention relates to the technical field of detonation circuits in electronic safety systems, in particular to a current-triggered detonation integrated circuit applied to electronic safety systems. Background technique [0002] The detonation circuit of the existing electronic safety system mainly has three trigger modes: the first one is logic level voltage trigger, and there are two trigger modes of positive logic level or negative logic level. The second is high-voltage level triggering. The third is the differential voltage trigger mode. [0003] All of the trigger methods above have requirements for instantaneousness, so the time width for detecting trigger methods is narrow, which makes the trigger methods more susceptible to interference from transient signals. The first logic level is the most susceptible to interference. The second high-voltage trigger signal requires an external high-voltage signal, which makes the circuit complex and...

AI Technical Summary

Problems solved by technology

[0003] All of the above trigger methods have requirements for instantaneousness, so the time width of the detection trigger method is narrow, which makes the trigger method more susceptible to interference from transient signals

The first logic level is most susceptible to interference

The second high-voltage trigger signal requires an external high-voltage signal, which leads to complex circuits and the high-voltage boost process will also interfere with peripheral circuits.

The disadvantage of the differential trigger method is that the generation of differential signals is also realized by logic levels.

Although the differential itself can improve the anti-interference ability, the logic level of the previous stage will still be affected by the interference

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