Protection Features Evaluation

Over current protection at +12V is not properly set since it allows the rail to drop well below 11.4 V. The wrong OCP setting at +12V means over power protection isn't working well. Super Flower should look into this issue to fix the +12V rail's OCP. Finally, over temperature protection is working well.

DC Power Sequencing

According to Intel's most recent Power Supply Design Guide (revision 1.4) the +12V and 5V rails must have voltages equal or greater than the 3.3V rail's output at all times, during power-up and normal operation. For our first measurement, we turn the unit off and switch it back on without any load on any of the rails.

EMC Pre-Compliance Testing – Average and Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other close-by devices.

Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other close-by devices if too high.



There is a high EMI spur at 162 KHz. The transient filter needs some tuning and a couple of additional Y caps.