Power Supply Application Notes
8 items under this folder.
Achieving MIL-STD-461 EMI compliance at the power supply and system level
Practical guidelines for meeting MIL-STD-461 EMI requirements with an NAI power supply: the tests most relevant to power, the CE102 conducted-emissions setup, and what to do at the power supply and system levels.
Current sharing 56TS1 power supplies
How the 56TS1 current-share feature works: master/slave share algorithm, load-balancing limits, Share_OK* BIT output, wiring for two paralleled units, and bench captures of power-up, load-transient, simulated-failure and delayed-start behavior.
INHIBIT* / ENABLE* control on NAI VPX power supplies
How the VITA 62 ENABLE* and INHIBIT* control inputs switch the output rails of NAI VPX power supplies, with the power status table, signal levels, P1 pin locations, and application examples.
Interpreting the Status LED on NAI VPX power supplies
Status indications, fault interpretation, and first-line troubleshooting for the Status LED on NAI VPX power supplies.
Measuring ripple on a switching power supply
Why ripple measurements on switching power supplies need high-frequency differential equipment, and a safe alternative using a floated scope and tip-and-barrel probing at the connector.
Power conversion terminology help guide
Alphabetical glossary of power-supply and power-conversion terms used in NAI power supply data sheets and manuals, from AC Fail Signal to WYE input configuration.
The VBAT feature on NAI VPX power supplies
What the VITA 62 VBAT output is on NAI VPX power supplies, why it is sourced from +3.3 VDC_Aux rather than a battery, and how to keep it alive with ENABLE*/INHIBIT*.
Using remote sense on VPX power supplies
How remote error sensing works on NAI VPX power supplies, where to terminate the sense lines, and how to wire S+/S- to the point of regulation through the backplane.