Unlock instant, AI-driven research and patent intelligence for your innovation.

Circuit for realizing PFC function by using current mode PWM controller

A current mode and controller technology, applied in the field of power supply, can solve the problems of high standby power consumption and high IC cost, and achieve the effect of low standby power consumption, low cost and high cost performance

Pending Publication Date: 2021-06-01
深圳市喜微科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dedicated PFC control IC solution, the technology is mature and stable, but most of the ICs are provided by foreign semiconductor giants Onsemi, ST, Infineon, NXP, etc., and the IC cost is relatively high; domestically launched some Flyback PFC and BuckPFC control ICs for the LED lighting market , but the standby power consumption is large, generally greater than 0.3W, not suitable for adapters and other occasions that require low standby power consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit for realizing PFC function by using current mode PWM controller
  • Circuit for realizing PFC function by using current mode PWM controller
  • Circuit for realizing PFC function by using current mode PWM controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0022] The present invention proposes a circuit that uses a current mode PWM controller to realize the PFC function, which is suitable for power factor correction (Power Factor Correction) circuits in power conversion applications. An ordinary current mode PWM controller without PFC function can be used, plus a small amount of The PFC function can be realized by peripheral components, which has the advantages of low cost, high PF value, good stability, and low THD.

[0023] The circuit for realizing the PFC function with the current mode PWM controller in the present invention includes: a current mode PWM controller 1, a power conversion unit 2, and a PFC control unit connected to the current mode PWM controller 1 and the power conversion unit 2 resp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a circuit for realizing a PFC (Power Factor Correction) function by using a current mode PWM (Pulse Width Modulation) controller; the circuit comprises a current mode PWM controller, a power conversion unit, a PFC control unit and an output error feedback unit; the PFC control unit and the output error feedback unit are electrically connected with the current mode PWM controller and the power conversion unit respectively; according to the invention, the functions can be realized by using an existing current mode PWM controller, the cost is low, the standby power consumption is also low, the cost performance is high, and the PFC control function can be realized without depending on a special PFC controller of a huge foreign semiconductor.

Description

technical field [0001] The invention relates to the field of power supply, in particular to a circuit for realizing PFC function by using a current mode PWM controller. Background technique [0002] PFC (power factor correction) is used to reduce the reactive power of the power grid, which helps to improve the utilization of grid capacity and reduce reactive power loss. It is widely used in the field of switching power supplies with input power greater than 75W. Dedicated PFC control IC solution, the technology is mature and stable, but most of the ICs are provided by foreign semiconductor giants Onsemi, ST, Infineon, NXP, etc., and the IC cost is relatively high; domestically launched some Flyback PFC and BuckPFC control ICs for the LED lighting market , but the standby power consumption is large, generally greater than 0.3W, so it is not suitable for adapters and other occasions that require low standby power consumption. Contents of the invention [0003] The present i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M1/42H02M1/08
CPCH02M1/42H02M1/08Y02B70/10
Inventor 肖海斌
Owner 深圳市喜微科技有限公司