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Mains supply zero-crossing detection circuit and non-isolated power supply system using the same

A zero-crossing detection circuit and circuit technology, applied in the direction of measuring current/voltage, measuring devices, electrical components, etc., can solve the problems of high cost, many internal components, low reliability, etc., and achieve low setting cost and packaging form Diversified, reliability-enhancing effects

Pending Publication Date: 2021-03-09
WUXI CHIPOWN MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above solution can achieve a certain function of isolated mains zero-crossing detection, there are many components in the system of this solution, the cost of the solution is high, the reliability is low, and the power consumption of the zero-crossing detection part is relatively high

Method used

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  • Mains supply zero-crossing detection circuit and non-isolated power supply system using the same
  • Mains supply zero-crossing detection circuit and non-isolated power supply system using the same
  • Mains supply zero-crossing detection circuit and non-isolated power supply system using the same

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Embodiment Construction

[0032] The present invention discloses a commercial zero-crossing detection circuit that can be integrated in a control chip, has high reliability, low system manufacturing cost, and low power consumption, and a non-isolated power supply system using the circuit. The details are as follows.

[0033] Such as figure 1 As shown, a commercial power zero-crossing detection circuit is provided with a circuit output terminal 100 and two circuit input and output terminals as a whole, and the two circuit input and output terminals are respectively the first circuit input and output terminal 101 and the second circuit input The output terminal 102 includes a switch control circuit 200 , a high withstand voltage switch tube assembly and a Zener diode 203 electrically connected to each other.

[0034] The switch control circuit 200 is used to control the magnitude of the current transmitted by the high withstand voltage switch tube assembly, and the Zener diode 203 is used to generate an ...

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Abstract

The invention discloses a mains supply zero-crossing detection circuit and a non-isolated power supply system using the same. The mains supply zero-crossing detection circuit comprises a switch control circuit, a high-voltage-withstanding switch tube assembly and a voltage stabilizing diode, wherein the switch control circuit is used for generating a driving signal to control the magnitude of a transmission current of the high-voltage-withstanding switch tube assembly, the high-voltage-withstanding switch tube assembly is used for receiving the driving signal to respond to and adjust the magnitude of the transmission current, and the voltage stabilizing diode is used for generating an output voltage for detecting a mains supply zero-crossing signal. The mains supply zero-crossing detectioncircuit provided by the invention is concise and visual in overall structure, and can perform real-time tracking detection on a mains supply voltage more stably; and moreover, the packaging forms arevarious, the used components are common and easy to obtain and can be directly integrated in the control chip, the setting cost is low, and the circuit is very suitable for large-scale popularizationof enterprises.

Description

technical field [0001] The invention relates to a detection circuit, in particular to a commercial power zero-crossing detection circuit and a non-isolated power supply system using the circuit, belonging to the technical field of power semiconductors. Background technique [0002] Nowadays, with the continuous development of electronic power technology and the continuous improvement of industrial manufacturing level, various household appliances have increasingly rich functions and more intelligent operations. Correspondingly, the internal hardware structure of these household appliances has become more and more complex. In the application scenarios of these household appliances, it is often necessary to detect the power frequency power supply voltage for timing or hardware protection. At this time, switching power supply technology begins to highlight its use value. [0003] Take the mains zero-crossing detection circuit currently used in household appliances as an example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/175H02M1/00
CPCG01R19/175H02M1/00
Inventor 杨帆李海松魏小康肖逸凡陶平
Owner WUXI CHIPOWN MICROELECTRONICS
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