Switching power supply controlled by negative voltage
A negative pressure control and negative pressure technology, which is applied in the electronic field, can solve problems such as power consumption, high cost of the scheme, and unsuitable product popularization, and achieve the effect of strong reliability and not easy to be damaged
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[0063] figure 1 figure 2 A production instance is expressed.
[0064] 1. Selected components: the anti-detonation tube is selected such as below 100 volts, and the voltage regulator tube is selected as a variety with a higher power. The voltage stabilization value basically meets the requirements. The triode in the current unit and the AC unit should use high back pressure and high power transistor 3DD15, the silicon controlled rectifier should use unidirectional low power silicon controlled rectifier, the negative voltage capacitor should choose the type with small leakage, and there are no special requirements for other components.
[0065] 2. Welding: according to figure 2 Schematic for soldering.
[0066] Three, power inspection and debugging.
[0067] (1) Detect and debug the voltage in the constant voltage and constant current unit.
[0068] Use a multimeter to test the double fixed triode ( figure 2 3.1) of the emitter, because the Zener tube in the base has a ne...
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