Power Factor Correction Circuit and Multiplier

A multiplier and circuit technology, applied in logic circuits, output power conversion devices, electrical components, etc., to achieve precise control and improve the accuracy of output current

Active Publication Date: 2018-11-13
COSEMITECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the multiplier in the prior art still has room for improvement in terms of output current accuracy and other solutions

Method used

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  • Power Factor Correction Circuit and Multiplier
  • Power Factor Correction Circuit and Multiplier
  • Power Factor Correction Circuit and Multiplier

Examples

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specific Embodiment approach

[0135]Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Furthermore, the described technical features or circuit structures may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present disclosure. However, one skilled in the art will appreciate that the techniques of the present disclosure may be practiced without one or more of these specific details.

[0136] Certain words are used to refer to specific components in the specification and claims, and those skilled in t...

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Abstract

The present disclosure provides a multiplier and a power factor correction circuit using the multiplier. The multiplier includes a Gilbert multiplier circuit, including first and second differential input stages and an output stage; a first differential voltage conversion circuit; a second differential voltage conversion circuit; and a bias current generation circuit; Wherein, the output stage includes: a current mirror unit, including two current input terminals and a current output terminal; a feedback control unit, used to ensure that when the voltage signal difference received by the multiplier is zero, the current There is no current output at the output. The disclosure is beneficial to improve the linearity of the multiplier and the accuracy of the output current of the multiplier.

Description

technical field [0001] The present disclosure relates to the technical field of power management, in particular to a multiplier and a power factor correction circuit using the multiplier. Background technique [0002] In order to utilize grid power more efficiently, power factor correction technology has been widely used in switching power supply technology. In the prior art, it is common practice to insert a first-stage power factor correction (Power Factor Correction, PFC) circuit between the diode rectifier bridge of the circuit and the load, so that the current drawn from the AC power supply is also a sine wave signal, and its phase follows power supply voltage varies. After adding the power factor correction circuit, the power factor value can be close to 1. [0003] An implementation of a PFC circuit such as figure 1 Shown in, which is applied to a boost converter (BoostConverter). The converter includes an inductor L, a switching device S, a freewheeling diode D, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0944
CPCH03D7/1441H02M1/4225H03D7/1433H03D7/1458Y02B70/10
Inventor 尹小平游剑
Owner COSEMITECH SHANGHAI CO LTD
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