US RE47,714 C1 (12,942nd)
Power converter with demand pulse isolation
William H. Morong, Paoli, PA (US); and Thomas E. Lawson, Malvern, PA (US)
Filed by CogniPower, LLC, Malvern, PA (US)
Assigned to CogniPower, LLC
Reexamination Request No. 90/019,538, Jun. 13, 2024.
Reexamination Certificate for Reissue Patent Re. 47,714, issued Nov. 5, 2019, Appl. No. 15/202,746, Jul. 6, 2016.
Application 90/019,538 is a continuation of application No. 15/090,929, filed on Apr. 5, 2016, granted, now RE47031.
Application 15/090,929 is a reissue of application No. 13/923,394, filed on Jun. 21, 2013, granted, now 9,071,152.
Claims priority of provisional application 61/667,473, filed on Jul. 3, 2012.
Claims priority of provisional application 61/727,795, filed on Nov. 19, 2012.
This patent is subject to a terminal disclaimer.
Ex Parte Reexamination Certificate issued on Jun. 24, 2025.
Int. Cl. H02M 3/335 (2006.01)
CPC H02M 3/33523 (2013.01) [H02M 3/33507 (2013.01); H02M 3/33515 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
The patentability of claims 18-40 and 42-64 is confirmed.
Claims 1-17 were previously cancelled.
Claims 41 and 65 were not reexamined.
18. Circuitry for controlling a flyback converter, the flyback converter comprising:
a converter primary side comprising an input port;
a converter secondary side comprising an output port, wherein the converter secondary side is galvanically isolated from the converter primary side; and
a power transformer configured to transfer input power received at the input port to provide output power at the output port, wherein:
the converter primary side further comprises a primary-side switch configured to selectively transfer the input power at the input port via the power transformer to the output power at the output port;
the circuitry comprises primary-side circuitry and secondary-side circuitry, wherein, when the circuitry is configured to control the flyback converter, (i) the primary-side circuitry is on the converter primary side and (ii) the secondary-side circuitry is on the converter secondary side;
the secondary-side circuitry (i) determines when to turn on the primary-side switch based on output port voltage or current at the output port and (ii) generates corresponding demand pulses;
the converter secondary side is configured to transmit the demand pulses to the converter primary side;
the primary-side circuitry is configured to turn on the primary-side switch in response to the demand pulses conveyed from the converter secondary side to the converter primary side, wherein the primary-side circuitry, and not the secondary-side circuitry, originates the determination of when to turn off the primary-side switch;
frequency with which the primary-side switch is turned on is adjusted by the demand pulses conveyed from the converter secondary side to the converter primary side to regulate the output port voltage or current; and
the converter secondary side further comprises:
a first capacitor; and
a first rectifier poled to charge the first capacitor during forward power converter pulses of the flyback converter, wherein the demand pulses are generated using energy stored in the first capacitor.