Power Supply Regulators Unit 4 – Voltage Feedback Regulation
Exercise 2 – Voltage Feedback Load Regulation
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to determine the load regulation of a
voltage feedback regulator by using measured values. You will verify your results with a
multimeter.
DISCUSSION
- Load regulation determines the ability of the voltage regulator to maintain a constant output
voltage with changes in circuit load. - The voltage feedback regulator has two principal control loops. The primary control loop
uses the variation in VCE to maintain a near-constant load voltage while the secondary control
loop applies feedback to Q3 causing control over the conduction of the pass transistor. - Load regulation percentage is calculated as follows:
% Load Regulation = (VO at min load - VO at max load)/VO at max load x 100