ISOLATED POWER SUPPLY, CONTROL SIGNAL TRANSMISSION CIRCUIT AND METHOD THEREOF

摘要

In one embodiment, method of generating a control signal for an isolated power supply, can include: (i) generating a first ground noise component with a first predetermined proportionality to a ground noise signal; (ii) generating a first peak signal based on a first control signal having the ground noise signal, where the first peak signal comprises a second ground noise component with a second predetermined proportionality to the ground noise signal; (iii) generating a second control signal based on a difference between the first peak signal and the first ground noise component; and (iv) controlling, by the second control signal, a switch of the isolated power supply.

主权项

1. A control signal transmission circuit configured in an isolated power supply, the control signal transmission circuit comprising:
a) a first signal converter coupled to a first ground potential having a ground noise signal, and to a second ground potential of said isolated power supply, wherein said first signal converter is configured to generate a first ground noise component with a first predetermined proportionality to said ground noise signal; b) a second signal converter coupled to a first control signal having said ground noise signal, and to said second ground potential, wherein said second signal converter is configured to generate a first peak signal based on said first control signal and having a second ground noise component with a second predetermined proportionality to said ground noise signal; and c) a control signal generator configured to generate a second control signal based on a difference between said first peak signal and said first ground noise component, wherein said second control signal is configured to control a switch of said isolated power supply.