Constant-current drive circuit-based voltage adjusting constant-current power supply

Abstract

The invention discloses a voltage-adjustable constant-current power supply based on a constant-current drive circuit, which is characterized in that it mainly consists of a processing chip U, a field effect transistor MOS1, a polar capacitor C4, a diode D3, a voltage adjustment circuit, and a constant-current drive circuit. , the triode voltage regulator circuit connected in series between the voltage adjustment circuit and the constant current drive circuit, the pulse trigger circuit connected with the drain of the field effect transistor MOS1, and the pulse trigger circuit connected in series between the drain of the field effect transistor MOS1 and the pulse trigger circuit Between the current detection circuit composition. The present invention can eliminate or attenuate the instantaneous high voltage and instantaneous high current of the input voltage and current due to external electromagnetic wave interference, so that the transmission of voltage and current can be dynamically kept stable, thereby ensuring that the present invention can output stable voltage and current, and Effectively ensure the normal use of electrical appliances.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a voltage-adjustable constant-current power supply based on a constant-current drive circuit. Background technique [0002] With the continuous development of modern technology, there are more and more types of electrical appliances, which have become an indispensable necessity in people's lives. When people choose a certain electrical appliance, they pay more attention to whether the working performance of the electrical appliance is stable, and the stability of the electrical appliance depends on whether the output voltage and current of the power supply used by the electrical appliance are stable. However, the current power supply used by electrical appliances has the problem of unstable output voltage and current due to the interference of external electromagnetic waves. Often, the voltage and current are too high or too low, which leads to the failure of normal use of electrical a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current in the power supply for electrical appliances in the prior art, and provide a voltage-adjustable constant-current power supply based on a constant-current drive circuit

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