Patent ID: 11929684
Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The control circuit of claim 1, wherein in the primary-side control signal generator, the secondary-side transistor switch control signal is configured to be asserted to enable the primary-side control signal generator, and wherein the second turn-on instant is an instant when the secondary-side transistor switch control signal is asserted to enable the primary-side control signal generator, the primary-side control signal generator comprising:
a first error amplifier configured to amplify a difference between the feedback signal of the output voltage of the isolated power supply and a second reference and output an amplified error signal; and
an oscillator configured to receive both the amplified error signal and the secondary-side transistor switch control signal and generate a square wave signal as the primary-side transistor switch control signal, wherein a frequency of the square wave signal is determined by the amplified error signal, wherein a rising or falling edge of the square wave signal indicates a turn-on instant for the primary-side transistor switch for a next period and is output when the secondary-side transistor switch control signal is detected as being asserted, and wherein when the oscillator determines based on a currently set frequency that the rising or falling edge of the square wave signal is supposed to arrive but the secondary-side transistor switch control signal has not been asserted yet, the oscillator delays the rising or falling edge of the square wave signal to an instant not earlier than the instant when the secondary-side transistor switch control signal is asserted.