LED driver efficiency Improvement

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How to improve the LNK406 LED driver efficiency.What are all the factors should be considered for the efficiency improvement.

For optimum efficiency determine the type of application:
1. Non-isolated converter is more efficient than isolated converter. Use Buck or buck-boost.
2. For flyback converter (Isolated), you can optimize your efficiency depending on the size of the transformer. Try to minimize the conduction loss(reduce the length of your wire as possible or use bigger wire gauge).
3. Use schottky diode for your output rectifier. Or use higher current rated diodes to reduce VF. use fast diodes.
4. Consider using higher LED voltage. In general, the higher the LED voltage the better for efficiency.
5. Reduce the capacitance of your transformer by adding extra layer of tapes without too much sacrificing the leakage inductance.