Hold-Up Time (hold-up time)
Hold-Up Time is a bridging time that describes the period during which the specified output power continues to be provided in the event of an input voltage failure. Even normal power supplies can bridge short-term power failures up to the range of seconds by means of appropriately dimensioned input storage electrolytic capacitors. The bridging time is short. There was no room for a larger bulk cap or a pair of them. In addition, the delay time from PWR_OK Inactive to DC Loss Delay is shorter than 1 ms, which is required by the ATX specification.
Timings
The power supply also supports alternative power saving modes.
Inrush current (starting current or inrush current)
All power supplies generate a so-called starting current, which often exceeds their nominal current consumption by far. The causes are the charging of the different capacitances in the input circuit and in the EMC filters, the build-up of the magnetic field in the transformer core and even the charging of the capacitors in the output filter. Only when the converter is operating stably does this input current drop back to normal values. The inrush current is low. I should note here that I plan to change the methodology of the inrush current measurements soon, so the results will most likely be different in the future.
- 1 - Einführung, technische Daten und Testreport
- 2 - Unboxing, Kabel und Schutzschaltungen
- 3 - Teardown: Topologie, Komponenten, Verarbeitung
- 4 - Load Regulation, Ripple Suppression, Transient Resonse
- 5 - Hold-Up Time, Timings, Inrush-Current
- 6 - Average Efficiency and PF
- 7 - Betriebsgeräusch und Lüfter
- 8 - Zusammenfassung und Fazit
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