How to tell if my Power supply is with Active PFC function or not ?
Below shows some simple methods for your reference. 1.Read the statements on the power supply or its advertisment: Accurate rate 90%. PFC is such an useful and powerful selling point that sellers want to highline it. End users can easily find the wordings such as ‘Power Factor Correct’ or ‘PFC’ from marketing materials including retail box, user’s manual, advertisement, or labels on the power supply. Since Active PFC outperforms Passive PFC, almost all power supplies with Active PFC will be pointed out the ACTIVE feature. Therefore, when a power supply with PFC function but doesn’t emphize it’s PFC type should be a Passive one. 2.Read the specification : Accurate rate 100%. The most reliable method is to check the specification of your power supply. An Active PFC power supply with the power factor (PF) more than 90% while the Passive one hardly excesses 80%. Without PFC, the normal PF is around 50%. 3.Check the back panel of the power supply: Accurate rate 50%. Usually the voltage inpu
