这是一种无变压器电源，特别是通用电源，用于提供具有电源电压的LED照明设备（LAST）。 所述电源单元包括用于提供经整流的电源电压，其中所述电源包括一个装置，用于边缘扫描的供电电压的整流（BR1）（I CI1）经整流的市电电压的，具有调节装置以采样整流的市电电压为预定调节电压值，其中 一个优选的调整手段。 - 修剪器（T1），用于向所述整流的市电电压的峰值幅度零之间的范围内设置所需的基本电压，以及 - 包括用于通过修剪器（T1）的微调所需的基本电压的特定范围内的电位器（P1）。 由边缘采样和用于边缘扫描（I CI1）的装置中，电源的输出电压可以被设置为任何值，以及成本，因为必须使用只有很小的电子元件。 By Flankenabtastung也可以是消费者的低功率控制和/或调节，特别是可以确保LED光源。 因此，功率损失可以保持尽可能低。

It is provided with a supply voltage, a transformer-less power supply, in particular a universal power supply, for the supply of an LED lighting device (LAST). The power supply unit comprises means for rectifying (BR1) of a supply voltage for providing a rectified mains voltage, wherein the power supply comprises a means for edge scanning (I ci1) of the rectified mains voltage, having an adjusting means to sample the rectified mains voltage to a predetermined adjustable voltage value, wherein a preferred setting.
- a trimmer (T1) for setting a required basic voltage in a range between zero to peak amplitude of the rectified mains voltage, and
- a potentiometer (P1) specified for fine adjustment of the trimmer by (T1) range of the required basic voltage
includes. By the edge sample and the means for edge scanning (I ci1), the output voltage of the power supply can be set to any value, as well as cost, since only small electronic components must be used. By the edge sample may further comprise a low-power control and / or regulating a load, in particular of an LED light bulb, can be ensured. Consequently, power loss can be minimized.