| 摘要 |
A ballasted LED lamp drive power supply with variable power and energy saving uses the technical solutions of a series circuit composed of a capacitor C1a, a capacitor C11, a switch K11, etc. and a series circuit composed of a capacitor C1b and a switch Ka which are connected across the G and N ends of a bridge rectifier circuit. The solution enables an LC-ballasted LED lamp drive power supply to be able to meet the requirements in terms in GB17743 without increasing an EMC circuit, and the circuit is simple, and the production costs can be saved. In an inductive ballasted LED lamp drive circuit with an impedance range of an inductive ballast Lz from greater than or equal to 52 ohms to less than or equal to 360 ohms, the technical solution of a series circuit composed of a capacitor C and a capacitor C1 and a switch K1 being connected in parallel across the D and N ends of a bridge rectifier circuit is used. The solution can improve the efficiency of production and assembly, reduce production costs and further improve the efficiency of an inductive ballasted drive power supply. |
