Protection Features Evaluation

OCP is properly configured on all significant rails. At 5VSB, I am used to seeing much higher OCP triggering points, which are usually of no concern since this regulator is typically underrated. Over power protection is also set correctly at close to 130%. Finally, all the other protection features are present and operate as they should.

DC Power Sequencing

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



The 3.3 V rail is always at a lower voltage than the other two rails.

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

Electromagnetic Compatibility (EMC) is the ability of a device to operate correctly 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.



Three spurs go over the limit with the QP detector.