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Variable feedback signal based on conduction time

A technology of conducting signals and conducting time, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, conversion of AC power input to AC power output, etc. very effective etc.

Active Publication Date: 2015-07-15
POWER INTEGRATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triac dimmer circuits are generally not very effective with conventional controlled power converter controllers
However, by indirectly measuring the phase angle in this way, the amount of detected dimming (and thus the amount the power converter's output is regulated to) is susceptible to changes in the ac input voltage

Method used

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  • Variable feedback signal based on conduction time
  • Variable feedback signal based on conduction time
  • Variable feedback signal based on conduction time

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Embodiment Construction

[0032] 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 present invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0033] 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 fea...

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Abstract

A controller for a power converter includes conduction detection circuitry and a variable reference generator. The conduction detection circuitry is coupled to generate a conduction signal representative of conduction times that an input signal is above a threshold value. The variable reference generator is coupled to receive the conduction signal and configured to generate a count value in response to a first conduction time of the conduction signal. The variable reference generator is coupled to output a reference signal in response to the count value and in response to prior count values stored in the variable reference generator.

Description

technical field [0001] The present invention relates generally to power converters and, more particularly, to power converters for use with dimmer circuits. Background technique [0002] Electronic devices use electricity to function. Switch-mode power converters are commonly used to power many of today's electronic devices due to their high efficiency, small size, and light weight. A regular wall outlet provides high-voltage alternating current. In a switching power converter, a high voltage alternating current (ac) input is converted through an energy transfer element to provide a properly regulated direct current (dc) output. Switch-mode power converter control circuits typically provide output regulation by sensing one or more inputs representing one or more output quantities and controlling the output in a closed loop. In operation, in a switch-mode power converter by changing the duty cycle of the switch (usually the ratio of the on-time of the switch to the total s...

Claims

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Application Information

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IPC IPC(8): H02M7/155H05B37/02H02M1/00H05B44/00
CPCH02M3/33507H02M7/217H02M3/33515H02M3/33523H02M5/257H05B45/385H02M1/0025H02M1/007
Inventor 毛鸣明R·L·J·普雷吉特泽T·帕斯托里P·沃格汉
Owner POWER INTEGRATIONS INC