公开(公告)号：US11382198B2

公开(公告)日：2022-07-05

申请号：US16898057

申请日：2020-06-10

Applicant: Infineon Technologies AG

Inventor： Maurizio Galvano ,  Alberto Trentin ,  Davide Ghedin ,  Fabio Fragiacomo

IPC: H05B47/105 ,  H05B45/14 ,  H05B47/25 ,  H05B45/52 ,  F21S4/26 ,  H05B45/3725 ,  F21Y115/10 ,  F21Y103/10

Abstract: This disclosure includes systems, methods, and techniques for controlling delivery of power to one or more strings of light-emitting diodes (LEDs). For example, a circuit includes a power converter configured to generate an electrical current, a switching device, and a sensor. The sensor is configured to compare a magnitude of the electrical current to a threshold, and in response to the magnitude exceeding the threshold, cause the switching device to turn on in order to sink a portion of the electrical current to prevent the magnitude of the electrical current from exceeding the threshold. When the switching device is turned on, the electrical current is divided into an undesired electrical current that flows across the switching device and a desired electrical current that flows to the string of LEDs.

公开(公告)号：US20180270923A1

公开(公告)日：2018-09-20

申请号：US15458450

申请日：2017-03-14

Applicant: Infineon Technologies AG

Inventor： Paolo Milanesi ,  Fabio Fragiacomo ,  Maurizio Galvano ,  Roberto Penzo ,  Enrico Tonazzo

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/083

Abstract: In one example, a system includes a load module, a power module, a series module, and a control module. The power module is configured to generate a supply power. The load module is configured to select a subset of light emitting diodes (LEDs) from a set of LEDs. The series module is configured to receive the supply power from the power module, dissipate a portion of the supply power, and output, to the subset of LEDs, a remaining portion of the supply power as a load power. The control module is configured to drive the series module to limit an amount of power at the subset of LEDs.

公开(公告)号：US20170347412A1

公开(公告)日：2017-11-30

申请号：US15169424

申请日：2016-05-31

Applicant: Infineon Technologies AG

Inventor： Paolo Milanesi ,  Roberto Penzo ,  Maurizio Galvano ,  Fabio Fragiacomo

IPC: H05B33/08

CPC classification number: H05B33/089 ,  H05B33/0824 ,  Y02B20/341

Abstract: In one example, a method includes determining, by a device of a system, a voltage feedback value that represents a voltage level of a power signal being provided to a plurality of load elements that are selectively active. In this example, the method also includes adjusting, by the device and based on a quantity of load elements of the plurality of load elements that are active, the voltage level of the power signal such that the voltage feedback value remains less than or equal to an overvoltage threshold.