Multi-preset high-low limit direct current voltage protection and reverse connection prevention electronic switch

Abstract

The invention discloses a multi-preset high and low limit direct current voltage protection and reverse connection prevention electronic switch, which comprises a plurality of preset high and low voltage threshold parameter protection channels, a high-side reverse connection prevention switch module, a low-side reverse connection prevention switch module and a change-over switch, preset high-low voltage threshold parameters in different preset high-low voltage threshold parameter protection channels are different, and action parameter ranges with different voltage values can be set; and the high-side anti-reverse-connection switch module or the low-side anti-reverse-connection switch module receives a driving signal sent by the protection channel under the action of different preset high and low voltage threshold parameter protection channels, and finally generates a corresponding switching action with a protection function. According to the invention, a plurality of switching intervals of the direct-current power supply voltage can be preset so as to meet the multi-interval continuous switching and multi-interval jump switching functions, the switching can be selected between high-side control and low-side control, the reverse connection prevention function is realized, and the universality is relatively high.

Description

technical field [0001] The invention relates to the field of electrical control, in particular to an electronic switch with multiple preset high and low limit DC voltage protection and anti-reverse connection. Background technique [0002] In the field of electrical control, the DC electronic switch undertakes the task of connecting and disconnecting the DC power supply and the load. In practical applications, the power supply voltage range provided for the DC load may be wide or non-constant, while the DC load There are different voltage working ranges; usually the most direct method is to preset the DC power supply voltage into multiple switching intervals, and the DC electronic switch can selectively switch between multiple switching intervals according to the different voltage working ranges of the DC load. Carry out relevant switching actions to meet the changing control needs; the main forms are multi-interval continuous switching and multi-interval jump switching; dif...

AI Technical Summary

Problems solved by technology

[0003] The DC electronic switch used in the prior art does not preset the DC power supply voltage into multiple switching intervals, cannot realize multi-interval continuous switching and multi-interval jump switching, and cannot meet the control of DC loads in different voltage working ranges Second, because the DC power supply used by the DC switch has positive and negative polarity requirements, and even its DC load has positive and negative polarity restrictions, so it is necessary to consider the problem of anti-reverse connection when designing the circuit, otherwise it may burn out the power supply or There are devices with polarity requirements in the circuit; in addition, according to the design requirements, the DC electronic switch should consider the problem of selecting the high-side or low-side control mode, otherwise it will not be driven reliably

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