| 摘要 |
<p>A converter module for dimming of at least one LED comprises a switched/clocked converter supplying power to the at least one LED, the converter advantageously being operated in a borderline mode, the converter comprising a transformer L1 with a bifilar primary winding L1b, and wherein the bifilar primary winding can be activated depending on the current value of the input voltage, which may be detected by a detection means such as auxiliary winding L1a, the voltage generated across the auxiliary winding being used to connect the bifilar primary winding to the negative supply rail of the circuit via a switching stage including transistors Q3, Q4.</p> |
