| 摘要 |
A low voltage lamp includes a boost converter stage (100) and a load (190). The load (190) may include low voltage light producing elements including low voltage light emitting diodes. The boost converter stage (100) receives an electronic transformer (ET, 200) output (Vot) and includes an inductor (L) coupled to a switch (Q) and a switch controller (110) that receives one or more controller inputs (111, 112, 115, 116). Inductor current (IL) may be returned to the transformer (ET, 130) when the switch (Q) is closed and provided to a rectifier (140)ncoupled to the load (190) when the switch (Q) is open. Controller inputs may include a transformer input (11, 112) that receives the transformer output (Vot), a sense input (115) indicating switch current (Iq), and a load input (116) indicating load voltage (Vc). Controller logic may synchronize assertions of a control signal for the switch with edge transitions of the transformer output to maintain peak inductor current within a specified range and to selectively transfer stored energy in the inductor to the load or back to the transformer. |
