A switch mode converter with signal transmission from the secondary side to primary side

摘要

It is a circuit for a switched-mode power supply described. According to an embodiment of the present invention comprises the circuit is composed of a switching converter with a transformer for the galvanic separation between a primary side and a secondary side wall of the switching regulator, wherein the switching converter is designed for this purpose, an input voltage supplied to the switching converter in accordance with a switching signal into an output voltage to convert. On the primary side wall of the switching regulator, a control circuit are arranged, which is designed for this purpose, the switching signal for the switching converter is, to produce. The circuit further comprises a galvanically separating transmission channel, via which a modulated feedback - signal for the control circuit is transmitted on the primary side. On the secondary side wall of the switching regulator is an integrated circuit is arranged, which has a code circuitry and a modulator circuit. The code circuitry are two or more feedback - signals, and the code circuitry generates from the feedback - signals, a coded signal. The modulator circuit generates the modulated feedback - signal according to the encoded signal.