Patent ID: 11870363
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. A flyback converter system comprising:
a transformer;
a synchronous rectifier (SR) transistor coupled to a secondary side of the transformer;
a capacitor coupled to the SR transistor, the capacitor to charge or discharge responsive to voltage received from the secondary side of the transformer; and
a secondary side controller comprising:
an SR sense pin coupled to the capacitor;
a diode-connected transistor coupled to the SR sense pin;
a first current mirror coupled to the diode-connected transistor and configured to receive, as input current, a reference current from a variable current source; and
a peak detect transistor coupled to the diode-connected transistor and to an output of the first current mirror, wherein the peak detect transistor is to output a peak detection signal in response to detecting current from the capacitor drop below the reference current.