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Printed flexible circuit (PFC) voltage following circuit

A voltage follower circuit and voltage follower technology, applied in the direction of high-efficiency power electronic conversion, electrical components, output power conversion devices, etc., can solve the problems of increasing device loss, affecting the service life of the circuit, reducing the reliability of the circuit, etc., to reduce the impact , simple structure, and the effect of improving work efficiency

Inactive Publication Date: 2018-11-23
杭州益川电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large fluctuation range of the input grid voltage, when the input voltage is at a low voltage, the high voltage difference between the input and output will cause great stress to the power device, which will increase the loss of the device and reduce the reliability of the circuit. , and affect the service life of the circuit

Method used

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  • Printed flexible circuit (PFC) voltage following circuit
  • Printed flexible circuit (PFC) voltage following circuit
  • Printed flexible circuit (PFC) voltage following circuit

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Embodiment Construction

[0013] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] Please see attached figure 1 And attached figure 2 , the present invention is mainly composed of a PFC voltage follower module, a PFC control chip U1, and a voltage feedback module. In this embodiment, the PFC voltage follower module is connected to the mains input terminal and the output voltage feedback terminal to detect the mains voltage and adjust the output voltage. In this embodiment, the PFC voltage follower module includes a rectification circuit composed of a rectifier bridge BD1, a voltage divider circuit composed of a resistor R1 and a resistor R2, and a filter circuit composed of a capacitor C1. The inputs of the rectifier bridge BD1 are respectively connected to the L and N terminals of the input commercial power. The positive terminal of the output of the rectifier bridge BD1 is connected to the resistor R1, and the n...

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PUM

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Abstract

The invention provides a printed flexible circuit (PFC) voltage following circuit. A PFC voltage following module is employed, an input voltage is detected in real time, an output voltage is adjustedaccording to a detection result, the output voltage is reduced when the input voltage is relatively low, and the output voltage changes with the input voltage. The PFC voltage following circuit is simple in structure and is low in cost. The voltage following circuit is formed on the basis of a traditional mature PFC circuit, so that the PFC voltage following is achieved; and the output voltage issynchronously adjusted to a relatively low value when the input voltage is relatively low, so that the impact to a switch power device for achieving voltage conversion is effectively reduced, the lifetime of the power device can be prolonged, and the integral working efficiency of a power supply is improved.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a PFC circuit. Background technique [0002] The output voltage of the existing PFC circuit designed with BOOST power supply topology is a fixed value, which must be higher than the peak value of the highest input voltage. Due to the large fluctuation range of the input grid voltage, when the input voltage is at a low voltage, the high voltage difference between the input and output will cause great stress to the power device, which will increase the loss of the device and reduce the reliability of the circuit. , and affect the service life of the circuit. Contents of the invention [0003] In view of the shortcomings of the PFC circuit in the prior art mentioned above during voltage conversion, the present invention provides a new PFC voltage follower circuit, which uses a PFC voltage follower module to detect the input voltage in real time, and according to the detection r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCH02M1/4225H02M1/0054Y02B70/10
Inventor 付增跃华徐专
Owner 杭州益川电子有限公司
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