Patent ID: 8217588

Claim:
An LED lamp comprising: One or more high-power LEDs, and a switcher regulator LED driver circuit such as a buck, boost, buck-boost or sepic topology circuit, said LED driver circuit receiving input voltage from conventional low-voltage lighting transformers, sampling said input voltage, and producing varying levels of regulated current to said LEDs in proportion to varying changes in the relative value of said input voltage, and causing the output intensity of said LEDs to increase and decrease in response to corresponding increases and decreases in the relative value of said input voltage; and containing input circuitry providing loading to said lighting transformers, and causing said lighting transformers to energize and produce said voltage to said LED Lamp, said input circuitry comprising: a PPTC device connected across the power input conductors, providing a low resistance current path at initial application of said input voltage, and providing a high resistance thereafter, until said input voltage is removed; and a high-pass filter connected across said power input conductors, said high-pass filter: providing a low resistance current path during high frequency pulse edges of said input voltage, and producing current pulses of sufficient magnitude at said high frequency pulse edges to cause said lighting transformers to oscillate at designed frequency when said conventional transformers are electronic type requiring a minimum load current to operate, a thermally conductive shell forming a mounting surface for said LEDs, said shell containing a cavity housing said LED driver circuit, and providing a thermally conductive path to transfer heat from said LEDs and said driver circuit through said shell and into surrounding air; and a base enclosing said cavity of said shell, and receiving said input voltage from said lighting transformers through conductive contacts in said base, and passing said input voltage to said LED driver circuit.