Ballasts for operating light emitting diodes in AC circuits

摘要: Several types of ballast circuits for operating one or many LEDs in AC finding particular use aircraft lighting panels are disclosed. The first type is a linear transfer function using inductors to limit diode current, and capacitors ensure unity input power factors. second non-linear factor, diodes shunted across series connected steepen the function. aim steepening imitate voltage—brightness characteristic incandescent bulbs, thereby providing direct replacement aerospace solution compatible with existing light dimmers. It also possible configure ballasts present invention DC voltage.