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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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VIPER17HD Fiches technique(PDF) 26 Page - STMicroelectronics |
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VIPER17HD Fiches technique(HTML) 26 Page - STMicroelectronics |
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26 / 33 page  Operation descriptions VIPER17 26/33 Equation 10 For a proper operation of this function, VIN on must be less than the peak voltage at minimum mains and VIN off less than the minimum voltage on the input bulk capacitor at minimum mains and maximum load. The BR pin is a high impedance input connected to high value resistors, thus it is prone to pick up noise, which might alter the OFF threshold when the converter operates or gives origin to undesired switch-off of the device during ESD tests. It is possible to bypass the pin to ground with a small film capacitor (e.g. 1-10 nF) to prevent any malfunctioning of this kind. If the Brown-out function is not used the pin has to be connected to GND. BRhyst BRhyst L L BRhyst BRhyst INoff INon H I V R R I V V V R + × − − = |
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