Patent ID: 11863079
Assignee: DIALOG SEMICONDUCTOR INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A secondary-side controller for a flyback converter, comprising:
a control logic circuit configured to generate a power switch transistor off signal responsive to feedback information;
an isolation capacitor driver configured to drive an at least one isolation capacitor with the power switch transistor off signal to signal a primary-side controller to switch off a power switch transistor;
an error amplifier configured to generate a threshold signal, wherein the threshold signal represents the feedback information;
an emulation circuit configured to generate an emulated signal representing an emulated primary-winding current; and
a comparator configured to compare the threshold signal to the emulated signal, wherein the control logic circuit is further configured to generate the power switch transistor off signal responsive to the emulated signal rising in amplitude to equal the threshold signal.