| 主权项 |
1. An isolated power converter circuit, comprising:
a transformer circuit, which includes a first winding and a second winding, configured to operably convert an input voltage to an output voltage; a power switch circuit, which is coupled to the first winding, configured to operably control the transformer to convert the input voltage to the output voltage according to a driving signal; an opto-coupler circuit, which has a first opto-coupler coupled to the second winding, configured to operably generate a feedback signal according to the output voltage; and a control circuit, which are coupled to the power switch circuit and the opto-coupler circuit, configured to operably generate the driving signal according to the feedback signal, wherein the control circuit includes:
a distinguishing circuit configured to operably generate a distinguishing signal by directly or indirectly determining a status of the feedback signal; anda driving signal generation circuit configured to operably determine, by the distinguishing signal, whether or not generating the driving signal according to the feedback signal; wherein the isolated power converter circuit has a normal operation mode and a stand-by mode, wherein when the isolated power converter circuit operates in the stand-by mode, an opto-coupler current flowing through the opto-coupler circuit is less than a maximum level of the opto-coupler current flowing through the opto-coupler circuit when the isolated power converter circuit operates in the normal operation mode; wherein the opto-coupler circuit further comprises a second opto-coupler, which is coupled to the second winding, and configured to operably generate a stand-by signal according to the output voltage. |
