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Switches that effectively reduce the voltage using the secondary switch

A technology of switching voltage and switching, applied in the field of controlling switching mode power converters

Active Publication Date: 2020-02-18
POWER INTEGRATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a trade-off between reducing the turn-on loss of the power switch and reducing the turn-off loss of the power switch

Method used

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  • Switches that effectively reduce the voltage using the secondary switch
  • Switches that effectively reduce the voltage using the secondary switch
  • Switches that effectively reduce the voltage using the secondary switch

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Embodiment Construction

[0028] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0029] Reference throughout this specification to "one embodiment," "an embodiment," "an example," or "an example" means that a particular feature, structure, or characteristic described with respect to the embodiment or example is included in the In at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. . Furthermore, the particular features, s...

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PUM

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Abstract

The present invention relates to a controller for use in a power converter comprising a primary controller and a secondary controller to control the switching of a power switch and a secondary switch respectively controlled by An energy transfer element coupled to a power converter. A first drive circuit is coupled to generate a first drive signal to enable a first on-segment of the secondary drive signal after an on-segment of the primary drive signal. A second drive circuit is coupled to generate a second drive signal to enable a second on segment of the secondary drive signal to store energy within the energy transfer element. Energy stored in the energy transfer element during the second on-segment is coupled to reduce a switching voltage across the power switch prior to a next on-segment of the primary drive signal. The secondary drive signal is generated in response to the first drive signal and the second drive signal.

Description

technical field [0001] The present invention generally relates to controlling power converters. More specifically, embodiments of the invention relate to controlling a switch mode power converter. Background technique [0002] Electronic devices, such as cellular phones, tablet computers, laptop computers, etc., use electricity to operate. Due to their high efficiency, small size, and low weight, switch-mode power converters are commonly used to power many of today's electronic devices. A regular wall outlet provides high voltage AC. In a switching power converter, a high voltage alternating current (ac) input is converted to provide a well regulated direct current (dc) output to the load through energy transfer elements. In operation, a switch is turned on or off by changing the duty cycle (typically, the ratio of the switch's on-time to the total switching period), changing the switching frequency, or changing the switching rate per unit time of a switch in a switch-mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M1/0054G06F1/32H02M3/33584H02M3/33592Y02B70/10G06F1/3287G06F1/3293G06F1/3296H02M3/3353
Inventor D·M·H·马修斯B·巴拉克里什南R·杜文雅克R·S·圣-皮埃尔
Owner POWER INTEGRATIONS INC
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