LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE
摘要
<p>A light-emitting diode (LED) driver is adapted to control either the magnitude of the current conducted through a LED light source or the magnitude of a voltage generated across the LED light source. The LED driver comprises a power converter circuit for generating a DC bus voltage, and an LED drive circuit for receiving the bus voltage and adjusting the magnitude of the current conducted through the LED light source. The LED driver is operable to dim the LED light source using either a pulse-width modulation technique or a constant current reduction technique. The LED drive circuit may comprise a controllable-impedance circuit, such as a linear regulator. The LED driver may be operable to control the magnitude of the bus voltage to optimize the efficiency and reduce the power dissipation in the LED drive circuit, as well ensuring that the load voltage and current do not have any ripple.</p>
申请公布号
WO2011044040(A1)
申请公布日期
2011.04.14
申请号
WO2010US51315
申请日期
2010.10.04
申请人
LUTRON ELECTRONICS CO., INC.;NUHFER, MATTHEW W.;SHEARER, THOMAS M.;CHITTA, VENKATESH;IYER, KARTIK
发明人
NUHFER, MATTHEW W.;SHEARER, THOMAS M.;CHITTA, VENKATESH;IYER, KARTIK