Auxiliary Power Supply Apparatus and Method for Isolated Power Converters
An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first inpu...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
20.08.2020
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Subjects | |
Online Access | Get full text |
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Summary: | An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference. |
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Bibliography: | Application Number: US202016865762 |