Hold-Up Time
Hold-up time is the time 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 long, and the power-ok signal is accurate. However, the duration of the power-ok delay signal could be shorter.
Timings
The power supply also supports alternative power saving modes.
Inrush current (starting current or inrush current)
All power supplies generate a so-called inrush 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. At 115 V the inrush current is increased, but at 230 V this is not the case. This is strange; normally it is the other way around.
- 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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