Linear voltage-stabilizing circuit with continuously adjustable output voltage and power supply having the circuit

Abstract

The invention discloses a linear voltage-stabilizing circuit with continuously adjustable output voltage and a power supply having the circuit. The linear voltage-stabilizing circuit with continuously adjustable output voltage includes a voltage-stabilizing input stage module and an amplification stage module. The amplification stage module includes an intermediate amplification stage module, or includes an intermediate amplification stage module and an output amplification stage module. The voltage-stabilizing input stage module is used for generating a reference voltage; the intermediate amplification stage module is used for performing power amplification processing on the reference voltage and outputting an amplified voltage signal or sending to the output amplification stage module; and the output amplification stage module is used for performing output power amplification on the voltage signal and sending to a post-stage. By adoption of the linear voltage-stabilizing circuit with continuously adjustable output voltage and the power supply having the circuit, voltage output is stable and adjustable, influence by temperature and input voltage is small, and the linear voltage-stabilizing circuit and the power supply having the same are simple and reliable, and has relatively high cost performance.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a linear voltage stabilizing circuit with continuously adjustable output voltage and a power supply with the circuit. Background technique [0002] With the development of science and technology, there are more and more types of electronic products, and the corresponding power supplies are also different. In the prior art, different electronic products require different supporting power sources according to different application fields and application attributes. However, in the prior art solutions, the voltage stabilizing chip in the power supply usually adopts an off-the-shelf three-terminal voltage stabilizing chip, such as LM1117-3.3V; however, the chip is relatively expensive, has a relatively large temperature drift, and most of the output voltage is not adjustable. There are also some existing voltage stabilization schemes that use the feedback output of the ope...

AI Technical Summary

Problems solved by technology

[0004] At present, the circuit design cost of voltage stabilization function is relatively high, the temperature drift is relatively large, the output voltage is not adjustable, and the current output capability is poor.

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