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Design Tips

Design Tips

5/24/2013
Current Story

Click image to enlarge Figure 1: Schematic of the flyback converter. After the transformer is inserted, the elements in green have to be selected and tuned.
5/16/2013
Fourth of a series on designing and building an offline flyback converter
Power Transformer Testing Figure 1 shows the schematic of the flyback converter with the transformer inserted into the circuit. Before applying the full load on the circuit, the elements in green have to be selected and tuned for proper operation. Current limiting
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Articles
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5/21/2013
In this third part of a series of videos on frequency response analysis, Dr.
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5/16/2013
Fourth of a series on designing and building an offline flyback converter
Power Transformer Testing Figure 1 shows the schematic of the flyback converter with the transformer inserted into the circuit. Before applying the full load on the circuit, the elements in green have
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5/16/2013
Alix Paultre, Editorial Director of Power Systems Design, and Dr. Ray Ridley
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5/14/2013
Designing and building an offline flyback converter
This article is the third of a series in which Dr. Ridley shows the steps involved in designing and building an offline flyback converter. The input filter rectifier is simulated to find the design range
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5/8/2013
In this video, Dr. Ridley presents the agenda for this unique power supply design
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5/3/2013
In this second part of a series of videos on frequency response analysis, Dr.
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5/1/2013
In this video, the first part of a series of videos on frequency response analysis,
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3/9/2013
This article is the second of a series in which Dr. Ridley shows the steps involved in designing and building an offline flyback converter. The second part of the series begins testing on the bias and
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2/28/2013
This article is the second of a series in which Dr. Ridley shows the steps involved in designing and building an offline flyback converter. The second part of the series begins testing on the bias
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1/25/2013
This article is the first of a series in which Dr. Ridley shows the steps involved in designing and building an offline flyback converter. The first part of the series presents the power supply architecture
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1/9/2013
In this article, Dr. Ridley continues the discussion of power supplies with input filters. He shows how the presence of a poorly-designed filter has a drastic effect on the loop gain of a voltage-mode
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12/22/2012
In this article, Dr. Ridley continues the discussion of power supplies with input filters. He shows how the output impedance of the input filter is measured, and demonstrates the importance of input filter
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11/10/2012
In this article, Dr. Ridley continues the discussion of input impedance measurements, and shows the effect of properly locating all of the input filter components. Middlebrook’s input filter stability
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9/7/2012
In this third part of this series of articles, Dr. Ridley discusses the fourth important frequency-response measurement made during full characterization of a switching power supply. The closed-loop input
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Dr. Ray Ridley
Contributing Editor
President, Ridley Engineering


Dr. Ridley is perhaps best-known in the industry for his landmark work on current-mode control which clarified exactly how the system should be analyzed for the best accuracy and practicality. This work has now been the standard for current mode analysis for over 20 years.