Low-voltage-side overvoltage protection circuit
A voltage protection and circuit technology, applied in the field of low-voltage side overvoltage protection circuits, can solve problems such as poor prevention reliability, and achieve the effect of strong versatility and fast protection in real time.
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[0037] Such as Figure 5 Shown is a circuit schematic diagram of a specific embodiment of the present invention, assuming that the normal setting voltage range of the low voltage side overvoltage protection circuit of the present invention is 8V-21V.
[0038] Such as Figure 7 As shown, assuming that the resistance value of the first voltage dividing resistor R501 is 20KΩ, and the resistance value of the second voltage dividing resistor R502 is 4.7KΩ, according to the formula U0=R502 / (R501+R502)*U2, the conduction diode D505 can be obtained The conduction voltage parameter U0=3.9V. In a specific embodiment of the present invention, the first triode V506 can use a 2SC2412K triode (not limited thereto), the second triode V404 can use a 2SD1780 triode or a 2SC1623 triode (not limited thereto), and the switch tube V20 can use a 2SB1260 triode (not limited to this).
[0039] Such as Figure 6-Figure 7 As shown, the parameters of each component are set as follows: the first curr...
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