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公开(公告)号：US11729883B1
公开(公告)日：2023-08-15
申请号：US17455850
申请日：2021-11-19
发明人： Wei Xiong
IPC分类号： H05B45/385 , H05B45/14
CPC分类号： H05B45/385 , H05B45/14
摘要： A two-stage driver supplies current to a light emitting diode (LED) load. The driver includes a first stage and a second stage. The first stage has a first flyback converter. The first stage is configured to receive a non-regulated voltage input and to generate a substantially constant bulk voltage across a first-stage output filter capacitor. The second stage has a second flyback converter. The second stage is configured to receive the bulk voltage from the first stage. The second stage is further configured to generate a desired current through the LED load. The second stage is electrically isolated from the first stage such that the LED load does not share a common ground reference with the non-regulated voltage input to the first stage. The driver further includes an auxiliary power supply coupled to an auxiliary winding of a transformer of the first flyback converter to generate an auxiliary voltage.
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公开(公告)号：US11546979B1
公开(公告)日：2023-01-03
申请号：US17647287
申请日：2022-01-06
发明人： Scott Price , Wei Xiong , Dane Sutherland
IPC分类号： H05B45/385 , H05B45/59
摘要： A two-stage driver supplies current to a light emitting diode (LED) load. The driver includes a first stage and a second stage. The second stage is configured to generate a desired current through the LED load. The second stage has a flyback converter having a flyback transformer with a primary winding and a secondary winding. The primary winding is turned on and off by a gating signal. An induced voltage in the secondary winding rings when a current in the secondary winding is discharged. The flyback converter is configured to turn on the primary winding only during a detected valley in the ringing of the secondary winding. If the primary winding is turned on during a detected valley different from the previous detected valley, a valley jump is detected and the switching frequency is adjusted.
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公开(公告)号：US20210303746A1
公开(公告)日：2021-09-30
申请号：US16831750
申请日：2020-03-26
发明人： John CAVACUITI , Masaaki IKEHARA
摘要： A technique for commissioning of light sources may include receiving data indicating planned geographic positions of the light sources and data representing commissioning information of the light sources, receiving data indicating an actual geographic position of an angle of arrival receiver relative to the planned geographic positions of the light sources, receiving, at the angle of arrival receiver, beacon signals carrying respective light source identifiers that uniquely identify respective light sources, calculating actual geographic positions of the light sources based on a) the actual geographic position of the angle of arrival receiver relative to the planned geographic positions of the light sources and b) respective angles of arrival of the beacon signals, comparing the planned geographic positions to the actual geographic positions to correlate the commissioning information to the light source identifiers, and transmitting the correlated light source identifiers and commissioning information to the respective light sources.
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公开(公告)号：US11089664B1
公开(公告)日：2021-08-10
申请号：US16851492
申请日：2020-04-17
发明人： Scott Price , Kevin Boyce
摘要： An LED driver includes a temperature sensing circuit integrated within its housing. The sensing circuit generates signals corresponding to actual temperature values within the driver housing to a controller. The controller receives programmable temperature derating parameters at least partially related to a light fixture receiving the driver housing, converts the temperature sensor signal into the actual temperature value, and derates the output current in linear fashion according to a transfer function when the actual temperature value falls within the temperature derating parameters. The parameters may include starting and ending temperatures, and an ending current parameter. The temperature sensing circuit may include a voltage divider with a negative thermal coefficient (NTC) device, preferably as the high side resistor. The temperature sensing circuit may typically provide a non-linear output across the temperature range, wherein the controller converts the non-linear output from the sensing circuit into a linear output for the transfer function.
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公开(公告)号：US11051377B1
公开(公告)日：2021-06-29
申请号：US16871653
申请日：2020-05-11
发明人： Wei Xiong
IPC分类号： H05B45/30 , H05B45/305 , H05B45/34
摘要： Circuitry and methods are provided for dynamically controlling the operating frequency of a resonant power converter. A feedback circuit generates error signals representing a difference between sensed output voltages and a constant target output voltage. A controller comprises a frequency control input terminal, and generates drive signals to half-bridge switching elements at determined operating frequencies. A frequency control circuit is coupled between the feedback circuit and the frequency control input terminal. The frequency control circuit sets minimum and maximum operating frequencies for the controller, and dynamically adjusts the operating frequency with respect to the constant target output voltage. A frequency control power supply circuit may further provide signals to the frequency control circuit representative of voltage across the resonant capacitor, wherein the minimum operating frequency is dependent thereon. The minimum frequency may be reduced with decreasing of the output voltage, and a maximum current may be reduced with increased overloading.
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公开(公告)号：US11049643B1
公开(公告)日：2021-06-29
申请号：US16048976
申请日：2018-07-30
发明人： Donald Folker , Mike LeBlanc
摘要： A magnetic connector assembly has two independent magnetic components sharing a common core structure. The magnetic assembly includes first and second bobbins, and includes a magnetic core. The magnetic core includes first and second core halves, each half including a main core body, a first outer leg, a second outer leg, and a middle leg. The first outer leg fits within a passageway of the first bobbin. The second outer leg fits within a passageway of the second bobbin. The middle leg fits between the two bobbins.
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公开(公告)号：US10930424B1
公开(公告)日：2021-02-23
申请号：US15679563
申请日：2017-08-17
发明人： Donald Folker , Mark Bauer , John J. Dernovsek , Mike LeBlanc
摘要： A low profile inductive apparatus is provided via one or more traces in a printed circuit board, the one or more traces defining inductive winding turns about an aperture, and a core comprising an elongate core member configured for positioning through the aperture of the circuit board. The core may be press fit with respect to the printed circuit board, or alternatively the elongate core member and the aperture may be reciprocally threaded. In an embodiment, core flanges may be provided on opposing sides of the printed circuit board, with the elongate core member connected between the core flanges and extending through the aperture. The number of inductive winding turns relates to a required inductance of the inductor when the elongate core member is positioned through the aperture, and a width and thickness of the windings corresponds to a required carrying capacity of the inductor.
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8.发明授权公开(公告)号：US10910139B1
公开(公告)日：2021-02-02
申请号：US15897354
申请日：2018-02-15
发明人： Donald Folker , Mike LeBlanc
摘要： A common mode choke assembly includes a main core, a shunt core, and first and second two-piece bobbins. The main core has a generally rectangular main core body, and first and second core riser portions. The first and second core riser portions are connected to opposite ends of the main core body. The first core riser portion includes a first riser notch and the second core riser portion includes a second riser notch aligned with the first riser notch. The shunt core spans between and is positioned within the first and second riser notches. The first and second two-piece bobbins are positioned on opposite sides of the main core body adjacent to the first and second core riser portions. Each two-piece bobbin includes at least first and second end flanges, a passageway, and a mating surface. The assembly further includes a mounting header for receiving the main and shunt core.
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9.发明授权公开(公告)号：US10788191B1
公开(公告)日：2020-09-29
申请号：US16141571
申请日：2018-09-25
发明人： Travis L. Berry
摘要： A light fixture, and lighting systems and methods, are provided for selectively receiving one of a modulator or a jumper plug at a connector port of the light fixture. The connector port is coupled between and electrically isolates a driver and a light emitting unit of the light fixture. The modulator, when connected to the connector port, is configured to receive unmodulated power from the driver and to provide modulated power to the light emitting unit. The jumper plug, when connected to the connector port, is configured to provide unmodulated power from the driver to the light emitting unit.
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公开(公告)号：US10707746B1
公开(公告)日：2020-07-07
申请号：US16423880
申请日：2019-05-28
发明人： Wei Xiong
IPC分类号： H02M1/42
摘要： A power supply for providing power to a load includes a main rectifier having first and second rectifier input terminals coupled to an alternating current (AC) power source, which converts AC power from the AC power source into a first direct current (DC) power signal at first and second rectifier output terminals, across which an energy storage device is coupled. A DC-DC power converter (e.g., a PFC circuit) comprises an integrated circuit (IC) and converts the first DC power signal into a second DC power signal in response to a multiplier signal received at a multiplier input of the IC. A multiplier input circuit as disclosed herein is coupled to the first and second rectifier input terminals and provides the multiplier signal to the multiplier signal input terminal, wherein the multiplier input circuit is decoupled from the energy storage device via the main rectifier.
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