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The % load regulation of a power supply should be ideally ________.
Zero
Small
More
Large
Zero
Load regulation measures the ability of a power supply to maintain a constant output voltage despite changes in the load current. An ideal power supply provides a perfectly constant output voltage regardless of the current drawn by the load, meaning the percentage load regulation should ideally be zero.
Load regulation measures the ability of a power supply to maintain a constant output voltage despite changes in the load current. An ideal power supply provides a perfectly constant output voltage regardless of the current drawn by the load, meaning the percentage load regulation should ideally be zero.
%Load┬аRegulation=VFLтАЛVNLтАЛтИТVFLтАЛтАЛ├Ч100% тАФ Percentage load regulation formula
%Load┬аRegulation=RLтАЛRoutтАЛтАЛ├Ч100% тАФ Load regulation expressed in terms of internal resistance and load resistance
In an ideal regulated power supply, the internal source resistance (RsтАЛ or RoutтАЛ) is zero. As the load current (ILтАЛ) increases from no-load (ILтАЛ=0) to full-load (ILтАЛ=IFLтАЛ), no internal voltage drop occurs across the output resistance. Consequently, the no-load output voltage (VNLтАЛ) remains exactly equal to the full-load output voltage (VFLтАЛ), resulting in zero load regulation.
Load regulation measures how constant the output voltage stays as load current changes from no-load to full-load.
For an ideal voltage source, internal output impedance RoutтАЛ=0, leading to zero voltage drop and 0% load regulation.
A lower percentage value indicates a superior and more stable voltage regulator.
Zero load regulation guarantees output voltage stability independent of load fluctuations.
Prevents sensitive electronic components from experiencing under-voltage or over-voltage conditions.
Achieving exact zero percent load regulation in practice requires complex, active feedback circuitry.
Ideal components with zero internal resistance do not exist in real-world physical systems.
Design and benchmarking of DC regulated power supplies (SMPS and linear regulators).
Precision analog circuits and microcontrollers requiring stable supply rails.
Practical power supplies typically achieve load regulation values below 1% or a few millivolts.
Option B (Small) represents realistic or ideal practical limits, but theoretically 'Zero' is the ideal value.
Option C (More) and Option D (Large) indicate poor voltage regulation, which leads to unstable output voltages under load.
A is correct тАФ The ideal % load regulation of a power supply is zero because an ideal voltage supply maintains a completely constant output voltage under all load conditions.
Remember: Ideal Voltage Source has RoutтАЛ=0╬й and 0% load regulation, whereas an Ideal Current Source has RoutтАЛ=тИЮ╬й.