Boost power factor correction (PFC) controller

A controller and step-up technology, applied in the direction of sustainable manufacturing/processing, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of high difficulty and high design cost, achieve fewer peripheral devices, and reduce design difficulty , The effect of reducing development costs

Active Publication Date: 2013-10-23
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

In the PWM controller of this traditional CCM step-up PFC circuit, an oscillator needs to be built in to generate a sawtooth wave signal with a fixed clock frequency, so as to ensure that the power switch tube Q M The operating frequency is constant; in addition, in this CCM step-up PFC circuit, it is essential to detect the input voltage Vg waveform, which is used to generate the reference signal Vr, so the number of pins of the PWM controller is large, Therefore, the traditional CCM boost PFC circuit design is costly and difficult

Method used

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  • Boost power factor correction (PFC) controller
  • Boost power factor correction (PFC) controller
  • Boost power factor correction (PFC) controller

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Embodiment Construction

[0032] The 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 solutions made on the essence and scope of the present invention. In order for the public to have a thorough understanding of the present invention, specific details are described in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0033] The step-up PFC controller described in the present invention is applied to an AC / DC converter, and the AC / DC converter also includes a power stage circuit, which has been introduced in the background art. The following implementations The components in the power stage circuit in the example are the same as those in the background art.

[0...

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Abstract

The present invention relates to a power factor correction (PFC) controller. In one embodiment, a boost PFC controller configured in an AC / DC converter can include: (i) a conductive signal generator configured to receive a first sampling signal, and to generate a conductive signal according to the first sampling signal and a first control signal; (ii) a shutdown signal generator configured to compare a second control signal against a third control signal, and to generate a shutdown signal when the second control signal reaches a level of the third control signal; and (iii) a logic controller coupled to the conductive signal generator and the shutdown signal generator to control a switching state of a power switch in AC / DC converter.

Description

Technical field [0001] The present invention relates to the field of power factor correction, and more specifically, to a boost PFC controller. Background technique [0002] In order to reduce the harmonic pollution caused by power electronic devices to the power grid, a power factor correction (PFC) circuit is usually added to its input side. Currently, active power factor correction circuits are often used to convert the input current of power electronic devices to the input voltage The sine wave of the same phase can improve the power factor of the power electronic device, thereby reducing the harmonic pollution of the power grid. At present, the active PFC circuit often adopts the boost PFC circuit topology. In high-power applications, the continuous conduction mode (CCM) boost PFC circuit is more attractive, the following reference figure 1 Describes a typical CCM boost PFC circuit. [0003] reference figure 1 , Shown is a block diagram of a typical CCM boost PFC circuit, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/08
CPCY02B70/126H02M1/42H02M1/4225Y02B70/10Y02P80/10
Inventor 赵晨姚杰
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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