在需要高功率因数的LED照明应用中使用安森美半导体NCL30000的技巧和诀窍
The NCL30000 is a flexible critical conduction mode(CrM) flyback controller intended for LED Lighting applications where high power factor is required. There are several demo boards available from ON Semiconductor which illustrate how the NCL30000 can be used in practical power supply applications. Some LED driver power supply designs have special requirements or need additional features not covered in the existing demo boards and application notes. This document covers some ideas to enhance performance in practical LED driver solutions.
Tip 1: Overload and Transformer Leakage Inductance
Under certain application situations, an offline LED driver may inadvertently have the outputs shorted together. This may also occur as part of a safety qualification regime.
..
