Output current configuration based on load connection
View Patent ↗A driver port that provides selectable output currents based on connections thereto, and a driver including the same, is provided. A plurality of shunt resistors are connected in series between a negative output of a driver and a ground. A driver port having a plurality of connection points is provided, each respective connection point connected to a different connection between two of the plurality of shunt resistors. A load including one or more solid state light sources is capable of being connected between one of the connection points of the driver port and a positive output of the driver.
1. A driver port providing selectable output currents, comprising:
a plurality of shunt resistors connected in series between a negative output of a driver and a ground;
a driver port having a plurality of connection points, wherein each respective connection point is connected to a different connection between two of the plurality of shunt resistors;
wherein a load is capable of being connected between one of the connection points of the driver port and a positive output of the driver; and
wherein the driver comprises:
an EMI front end coupled to a voltage source, the EMI front end configured to provide a rectified direct current voltage;
a boost PFC circuit coupled to the EMI front end and configured to provide a boosted voltage;
an inverter coupled to the boost PFC circuit;
a PFC and Half Bridge coupled to the boost PFC circuit and the inverter;
an isolation transformer having a primary side coupled to the inverter;
a rectifier coupled to a secondary side of the isolation transformer; and
an output filter coupled to the rectifier, wherein an output of the output filter is coupled to the driver port; and
a regulator circuit in communication with the driver and the driver port, wherein the regulator circuit comprises a first input in communication with the negative output of the driver, a second input in communication with the output of the output filter of the driver, and an output coupled to a primary side of the isolation transformer.
2. The driver port of claim 1 , wherein the plurality of connection points provide different output currents for the load.
3. The driver port of claim 1 , further comprising a driver for one or more solid state light sources in electrical communication with the driver port.
4. A method of providing different currents to different loads, comprising:
providing a plurality of shunt resistors connected in series between a negative output of a driver of one or more solid state light sources and a ground;
providing a driver port having a plurality of connection points, each respective connection point connected to a different connection between two of the plurality of shunt resistors; and
connecting a load comprising one or more solid state light sources between one of the connection points of the driver port and a positive output of the driver; and
placing the driver of one or more solid state light sources in electrical communication with the driver port by providing a driver of one or more solid state light sources, the driver comprising:
an EMI front end coupled to a voltage source, the EMI front end configured to provide a rectified direct current voltage;
a boost PFC circuit coupled to the EMI front end and configured to provide a boosted voltage;
an inverter coupled to the boost PFC circuit;
a PFC and half bridge coupled to the boost PFC circuit and the inverter;
an isolation transformer having a primary side coupled to the inverter;
a rectifier coupled to a secondary side of the isolation transformer; and
an output filter coupled to the rectifier, wherein an output of the output filter is coupled to the driver port; and
providing a regulator circuit comprising a first input in communication with the negative output of the driver, a second input in communication with an output of the output filter of the driver, and an output coupled to a primary side of the isolation transformer, in communication with the driver and the driver output port.
5. The method of claim 4 , wherein providing different connection points provides different output currents for the load.
6. The method of claim 4 , wherein providing a regulator circuit in communication with the driver and the driver output port comprises providing a constant current constant voltage regulator in communication with the driver and the driver output port.