US Patent No. 10,299,331

LED RETROFIT DRIVER CIRCUIT AND METHOD OF OPERATING THE SAME


Patent No. 10,299,331
Issue Date May 21, 2019
Title Led Retrofit Driver Circuit And Method Of Operating The Same
Inventorship Robertus Leonardus Tousain, Eindhoven (NL)
Redouane Eddeane, Utrecht (NL)
Dennis Johannes Antonius Claessens, Eindhoven (NL)
Philip Louis Zulma Vael, Temse (BE)
Jack Jiang, Shanghai (CN)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,299,331

1. An LED retrofit driver circuit comprising:an input for receiving an operating voltage from a power supply;
an output for connection to one or more LED units;
a power converter connected with said input and said output and configured to provide a lamp current at said output, wherein the power converter is configured to operate in at least a first operating state,
in said first operating state, the power converter being configured to switch between:
a high current generating mode, in which the power converter is configured to draw current pulses from said power supply to draw a first average input current, and
an OFF mode during which no current is drawn from said power supply, wherein the power converter is configured to operate in at least a second operating state, and
in said second operating state, said power converter being configured at least to operate in
a low current generating mode, in which the power converter is configured to draw current pulses from said power supply to draw a second average input current, the second average input current being lower than said first average input current.