Notification 702 – KP is less than 0.4

CATEGORY

ISSUE / RESULT

FIX / REFERENCE(S)

Warning

The Minimum calculated KP is lower than 0.4. This may happen if the power capability of the product family has been exceeded. This results in the design to be in deep in continues current mode and therefore not optimum. A low KP may trigger the SOA Protection. A low KP also affects the Average/RMS current ratio resulting in a higher RMS current, therefore, more copper losses in the transformer windings.

The minimum KP value may be increased by increasing the maximum VOR and/or increasing the maximum frequency at which the Power Supply is allowed to operate. Pick a device with higher BVDSS or power capability.