SWITCHED-MODE CONVERTER WITH SIGNAL TRANSMISSION FROM SECONDARY SIDE TO PRIMARY SIDE
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United States of America Patent
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Issued Date -
Dec 22, 2016
app pub date -
Jun 15, 2016
filing date -
Jun 17, 2015
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Abstract
A circuit for a switched-mode power supply is described. According to at least one configuration, the circuit comprises a switched-mode converter having a transformer for DC isolation between a primary side and a secondary side of the switched-mode converter, wherein the switched-mode converter is designed to convert an input voltage supplied to the switched-mode converter into an output voltage as stipulated by a switching signal. Arranged on the primary side of the switched-mode converter is a control circuit that is designed to produce the switching signal for the switched-mode converter. The circuit furthermore comprises a DC isolating transmission channel that is used to transmit a modulated feedback signal to the control circuit on the primary side. Arranged on the secondary side of the switched-mode converter is an integrated circuit that has an encoding circuit and a modulator circuit. The encoding circuit is supplied with two or more feedback signals, and the encoding circuit produces an encoded signal from the feedback signals. The modulator circuit produces the modulated feedback signal as stipulated by the encoded signal.
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