LED lamp arrangement adapted to replace fluorescent lamp in luminaire with ballast
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United States of America Patent
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Oct 17, 2017
Issued Date -
N/A
app pub date -
Sep 9, 2016
filing date -
Sep 9, 2016
priority date (Note) -
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Abstract
An LED lamp arrangement is disclosed to replace a fluorescent lamp in a luminaire with a ballast. The LED lamp arrangement has a rectifier, LEDs, a LED driver, an impedance balance circuit, a line-voltage controller. The rectifier has two inputs connected to the ballast to provide a rectified power line and a ground power line. The LEDs and a LED driver are connected in series between the rectified power line and the ground power line, and the LED driver regulates a LED driving current through the LEDs. The impedance balance circuit is coupled between the inputs. The line-voltage controller controls the impedance balance circuit in response to a line voltage at the rectified power line, so as to tune an impedance between the inputs and make the line voltage approach to a predetermined target voltage.
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