| 摘要 |
A system for controlling a circuit having a transformer arranged between input circuitry and output circuitry to galvanically isolate the output circuitry from the input circuitry comprises a power switch controlled to apply voltage to the transformer, a switch control circuit responsive to a difference between a variable control value and a variable reference value to control the power switch so as to control the voltage applied to the transformer, a control value generating circuit for producing the control value as a function of the voltage applied to the transformer and an on-time of the switch, and a reference circuit for producing the reference value that varies as a function of the voltage applied to the transformer |
