Efficiency Normal, Light & Super-Light Loads
The efficiency of a power supply describes the percentage of the AC power consumed that is converted into usable DC power for the system, while the rest is lost as heat. A power supply unit with 80 percent efficiency that supplies 400 W direct current, for example, draws 500 W from the socket, with 100 W being dissipated as heat. The average efficiency is sufficiently high for normal loads, but unsatisfactory for low or very low loads.
Average efficiency
The average efficiency fulfills the Cybenetics Platinum criteria.
Average Efficiency 5VSB
The 5VSB rail is very good.
Vampire Power
Vampire power, also known as standby power, refers to the power consumption of a power supply unit when it is plugged in but not actively supplying energy to a device, for example when the computer is switched off or in energy-saving mode. This low, permanent consumption (usually only a few watts) is caused by background functions such as supplying the standby rails, for example 5VSB for Wake-on-LAN. Low vampire power is advantageous as it reduces energy losses and electricity costs. The vampire power is extremely low. It was measured without a connection to the system via the supplied USB cable and without any iCUE devices connected.
PFC (power factor correction)
The power factor for power supply units is the ratio of active power (power actually used, measured in watts) to apparent power (total power consumed, measured in volt-amperes). It indicates how efficiently a power supply unit uses the AC energy supplied. A higher power factor, as close to 1 as possible, is advantageous as it means lower energy losses, a lower load on the power grid and better overall efficiency. In modern power supply units, this is usually achieved by means of active power factor correction (APFC). The APFC converter must be better tuned for higher power factor values. The digital controllers are not optimally utilized in this area.
- 1 - Introduction, Prices and Technical Data
- 2 - Unboxing, Cables and iCUE
- 3 - Protection and EMI
- 4 - Teardown: Topology, components and craftmanship
- 5 - Load Regulation, Ripple Suppression, Transient Resonse
- 6 - Hold-Up Time, Timings, Inrush-Current
- 7 - Average Efficiency and PF
- 8 - Operating noise and fan
- 9 - Summary and conclusion

















































17 Antworten
Kommentar
Lade neue Kommentare
Urgestein
Veteran
Veteran
Veteran
Veteran
Veteran
Veteran
Veteran
Veteran
1
Urgestein
Veteran
Veteran
Veteran
Veteran
Veteran
Veteran
Alle Kommentare lesen unter igor´sLAB Community →