SYSTEM AND METHOD FOR CONTROLLING MAXIMUM OUTPUT DRIVE VOLTAGE OF SOLID STATE LILGHTING DEVICE

摘要

A programmable driver for driving a solid state lighting device includes a processing circuit, a voltage feedback loop and a power stage. The processing circuit is configured to determine a voltage reference signal based on a nominal current setting and a predetermined power limit. The voltage feedback loop is configured to receive the voltage reference signal and to determine a difference between a reference voltage indicated by the voltage reference signal and a drive voltage of the solid state lighting device. The power stage is configured to limit maximum output voltage for driving the solid state lighting device based at least in part on the determined difference between the reference voltage and the drive voltage of the solid state lighting device provided by the voltage feedback loop.

主权项

1. A programmable driver for driving a solid state lighting device, the driver comprising:
a processing circuit configured to determine a voltage reference signal (Vref) based on a nominal current setting and a predetermined power limit; a voltage feedback loop configured to receive the voltage reference signal and to determine a difference between a reference voltage indicated by the voltage reference signal and a drive voltage of the solid state lighting device; and a power stage configured to adjust a maximum output voltage of the driver to enable driving the solid state lighting device based at least in part on the determined difference between the reference voltage and the drive voltage of the solid state lighting device provided by the voltage feedback loop, wherein the predetermined power limit indicates a maximum output power stage is able to deliver.