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Method for regulating an output current/voltage for a primary-controlled switching circuit part with a transformer and a control circuit applies a test value formed within the circuit and used to affect the control circuit.
Method for regulating an output current/voltage for a primary-controlled switching circuit part with a transformer and a control circuit applies a test value formed within the circuit and used to affect the control circuit.
A switching circuit part (1) has a transformer (2), a control circuit (3) and an electronic switch (4). Inputs (X9,X10) connect to mains AC voltage. Outputs (LTG100,LTG101) supply an output voltage (Ua), one (LTG100) with a positive potential. A protective resistor (R10), two diodes (D10,D11) and a coil (L10) connect in series to a primary circuit (5) for the transformer. Two filter capacitors (C10,C11) are connected in parallel to the inputs. An Independent claim is also included for a circuit for implementing the method of the present invention.
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