We are working on a design with the LCS700HG.
Input voltage is 400Vdc, output voltage 12Vdc/4A maximum.
Under some low load circumstances (approx. 50-150mA) the controller heats itself, causing it to shutdown thermally.
We have noticed that when this happens the burst frequency is different from when situations where it doesn't occur. The situation seems to start when a small transient in the load current occurs, from zero load to approx. 100mA.
This power supply is in a redundant, hot swappable, system. The LCS is on the board without heatsink (max. load 48W).
Is this a common problem or are we doing something wrong? If it's common, what can we do to solve it?