Voltage regulation circuit and method
A voltage regulation circuit and voltage technology, which is applied in the direction of regulating electric variables, control/regulation systems, instruments, etc., can solve the problems of high temperature of power tube M20, hidden safety hazards, and affecting normal operation of the circuit, so as to reduce heat generation and improve Effect of Lightning and Surge Protection Function
Pending Publication Date: 2020-12-08
JOULWATT TECH INC LTD
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- Application Information
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Problems solved by technology
However, long-term exposure to such a high voltage is likely to cause the temperature of the power tube M20 to be too high, thus affecting the normal operation of the circuit
In addition, the existing technology lacks low-power lightning protection functions, and if it is applicable to the power industry, there will be potential safety hazards
Method used
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[0025] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.
[0026] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.
[0027] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...
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Abstract
The invention discloses a voltage regulating circuit and method, the voltage regulating circuit comprises a power tube and a driving control circuit thereof, the power tube receives an input voltage,and the power tube is regulated through the driving control circuit to output an expected output voltage; the drive control circuit is connected with the control end of the power tube, and the input voltage is provided with a high potential end and a low potential end; wherein one power end of the power tube is connected with one of the high potential end and the low potential end of the input voltage, one end connected with the power tube serves as a first end of the input voltage, the other end serves as a second end of the input voltage, and the second end of the input voltage and the otherpower end of the power tube jointly serve as an output end; at least one impedance element is connected in series in a loop comprising the input voltage and the power tube, and when the temperature of the power tube reaches the upper limit of the temperature, the power tube works in a switching mode. According to the circuit, the calorific value of the power tube is greatly reduced, and the lightning protection and surge protection functions of the circuit are improved.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a voltage regulating circuit and method. Background technique [0002] A linear voltage regulator circuit is a circuit realization form that realizes input and output voltage conversion. When the input and output voltage is high voltage, such as hundreds of volts or even hundreds of volts, the two ends of the power tube will also bear the corresponding high voltage. In the case of continuous high voltage use, it will cause the power tube to heat up. If the temperature is too high, it will affect the voltage. Regulate the normal operation of the circuit, trigger over-temperature protection, and even damage the power tube. [0003] Existing technologies such as figure 1 The shown voltage regulation circuit receives an input voltage Vin, and outputs a desired output voltage Vout at the output terminal by regulating the voltage borne by the power transistor M20. Taking t...
Claims
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Login to View More IPC IPC(8): G05F3/08
CPCG05F3/08
Inventor 黄必亮
Owner JOULWATT TECH INC LTD