Low-voltage starting circuit capable of bearing high voltage and having reverse-phase protection function
A reverse-phase protection and low-voltage start-up technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as inability to apply low-voltage and high-voltage simultaneous actions, inconformity with electronic products, and increased manufacturing costs, so as to maintain power supply effect, stable power supply effect, and streamlined circuit effect
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[0013] In order to make it easier for your examiners to understand other features and advantages of the present invention, and the effects achieved by it can be more apparent, the present invention is now described in detail with the accompanying drawings as follows:
[0014] Such as figure 1 , 2 As shown, the present invention is a low-voltage start-up circuit capable of withstanding high voltage and having a reverse phase protection function, which mainly includes: a first switching transistor 11 and a second switching transistor 12 that switch and conduct two NPs with different polarities. The switch pins of the latter are different and connected to the power input terminal 21 and the power output terminal 20, wherein:
[0015] The first switch transistor 11 is N-type, its drain is coupled to the power input terminal 21, its source is coupled to the power output terminal 20, its gate is coupled to a node 49 of a voltage stabilizing circuit 4, and The voltage stabilizing c...
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