Constant on-time (COT) control in isolated converter
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United States of America Patent
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Apr 23, 2019
Grant Date -
Mar 17, 2016
app pub date -
Dec 7, 2014
filing date -
Sep 12, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A constant on-time isolated converter comprising a transformer is disclosed. The transformer primary side connects to an electronic switch and secondary-side connects to a load and a processor. The processor connects to a driver on primary side through at least one coupling element and to the electronic switch. The processor receives an output voltage or an output current across the load generating a control signal. The driver receives control signal through the coupling element and accordingly changes the electronic switch ON/OFF state, regulating output voltage and current via the transformer, where the electronic switch ON/OFF duration is determined between the moment control signal changes from negative to positive and the moment it changes from positive to negative to achieve a high-speed response to load transient.
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