| 摘要 |
A switched mode power supply, SMPS, circuit (1) comprising a transformer (4) configured to convert an input voltage (Vin) applied to a primary winding (5) of the transformer (4) into an output voltage at a secondary winding (6) of the transformer (4), a galvanic isolated feedback circuit (10) configured to control the output voltage at the secondary winding (6) of the transformer (4), wherein the galvanic isolated feedback circuit (10) comprises an inductor (13) to which the output voltage of the secondary winding (6) of the transformer (4) is applied to generate a magnetic field measured by a Hall sensor (13) of that galvanic isolated feedback circuit (10) to provide a control voltage used to control the output voltage at the secondary winding (6) of the transformer (4). The output voltage at the secondary winding can be constant, but changing the duty cycle controls the output voltage of the whole device. |
