Configurable LED driver/dimmer for solid state lighting applications
The disclosure is directed at a configurable light emitting diode (LED) driver/dimmer for controlling a set of light fixture loads comprising: a power circuit; a primary digital controller for controlling the power circuit; a set of output current drivers, each of the set of output current drivers connected to one of the set of light fixture loads for controlling the associated light fixture load; a secondary digital controller for controlling the set of output current drivers; wherein the secondary controller transmits LED control information to control outputs of the set of output current drivers; and wherein the secondary digital controller provides digital feedback control information to the primary digital controller.
1. A configurable light emitting diode (LED) driver/dimmer for controlling a set of light fixture loads comprising:
a power circuit including:
an inrush current limit;
a DC/DC converter;
a power factor correction (PFC) boost connected to the inrush current limit and the DC/DC converter;
a regulated output voltage bus connected to the DC/DC converter; and
at least one power limit connected to the output voltage bus;
a primary controller for controlling the power circuit;
a set of output current drivers, each of the set of output current drivers connected to one of the set of light fixture loads for controlling the associated light fixture load;
a secondary controller for controlling the set of output current drivers;
wherein the secondary controller transmits LED control information to control outputs of the set of output current drivers.
2. The LED driver/dimmer of claim 1 further comprising:
a set of in-circuit serial programming (ICSP) ports, each of the set of ICSP ports associated with one of the set of output current drivers for configuration of output current drivers.
3. The LED driver/dimmer of claim 1 further comprising a communication interface for receiving data from an external transmitter and for transmitting the data to the secondary controller.
4. The LED driver/dimmer of claim 3 further including an isolation barrier for separating the secondary controller and the communication interface.
5. The LED driver/dimmer of claim 3 wherein the communication interface is either DMX512A, 0-10 Vdc analog control, Zigbee wireless or Remote Device Management (RDM) compatible.
6. The LED driver/dimmer of claim 3 comprising an auxiliary flyback converter to provide power to the primary controller, secondary controller, and communication interface.
7. The LED driver/dimmer of claim 1 further comprising a housing portion for housing the components of the driver.
8. The LED driver/dimmer of claim 7 wherein the housing portion comprises:
an aluminum heatsink; and
a U-shaped chassis.
9. The LED driver/dimmer of claim 8 wherein the heatsink comprises a plurality of fins.
10. The LED driver/dimmer of claim 9 wherein heatsink acts to cool the driver/dimmer via convection cooling.
11. The LED driver/dimmer of claim 8 further comprising a thermally conductive electrically isolated material for coupling the power circuit to the chassis to further improve heat dissipation.
12. The LED driver/dimmer of claim 1 wherein the inrush current limit comprises:
a switch;
a relay coil, connected to the switch; and
a thermistor;
wherein the relay coil and the thermistor are in parallel with each other.
13. The LED driver/dimmer of claim 1 wherein the light fixture load is one of an Organic LED (OLED) load or an LED load.
14. The LED driver/dimmer of claim 1 wherein the secondary controller provides feedback control information to the primary controller.
15. The LED driver/dimmer of claim 1 wherein the primary and secondary controllers are digital controllers.
16. The LED driver/dimmer of claim 15 further comprising an in-circuit serial programming (ICSP) port connected to the digital controllers.
17. The LED driver/dimmer of claim 16 comprising a means to map output current drivers to various DMX512 addresses.
18. The LED driver/dimmer of claim 16 comprising a means to map output current drivers to various dimming zones for 0-10 Vdc control.
19. The LED driver/dimmer of claim 16 further comprising an isolated communication bus to transmit the digital feedback control into the primary controller.
20. The LED driver/dimmer of claim 15 wherein the primary digital controller can disable the PFC boost and DC/DC Converter at zero light intensity state.
21. A power circuit for a configurable light-emitted diode (LED) driver, the power circuit comprising:
an inrush current limit;
a DC/DC converter;
a power factor correction (PFC) boost connected to the inrush current limit and the DC/DC converter;
an output voltage bus connected to the DC/DC converter; and
at least one power limit connected to the output voltage bus.