Discussion Overview
The discussion revolves around the current drawn by a power supply when no load is applied, specifically focusing on the interpretation of leakage current mentioned in datasheets and the actual current consumption of different types of power supplies.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions whether the leakage current mentioned in the datasheet refers to the current drawn when no load is applied, suggesting it is on the order of microamps.
- Another participant clarifies that the current drawn from the mains by a bench-top power supply is likely not in the microamp range due to additional circuitry and losses, and suggests measuring it with a clamp-style ammeter.
- A different participant specifies they are referring to a dual output linear open chassis power supply, which may differ from more complex laboratory power supplies.
- One participant explains that the leakage current referred to in safety regulations is related to leakage to Earth Ground, highlighting its significance for safety, especially in medical devices.
- There is mention that the no-output-load input power consumption may sometimes be specified for power supplies, particularly for components like linear voltage regulators.
- A suggestion is made to measure the current using an AC current clamp and to separate the Hot/Neutral wires carefully for accurate measurement.
Areas of Agreement / Disagreement
Participants express differing views on the nature of the current drawn by various types of power supplies and the interpretation of leakage current, indicating that multiple competing views remain without a consensus.
Contextual Notes
There are limitations regarding the definitions of leakage current and the specific types of power supplies discussed, as well as the potential variability in specifications provided by manufacturers.