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LAB 439 - Control Loop Analysis

资料介绍
Measuring Feedback Loop Response In Power Systems.
LeCroy Application Brief No. LAB 439

Control Loop Analysis
Measuring Feedback Loop Response In Power Systems
Every power supply has a feed-
back loop that monitors the
output voltage or current and
keeps the device’s on-time ap-
propriate to the load. This
means that the power device
conducts longer if the output
voltage is too low. Most
switched mode power supplies
use pulse width (PWM) or fre-
quency modulation (FM) in their
control loops. Analysis of the
loop dynamics requires the abil-
ity to demodulate these signals.
Power Measure Analysis
(PMA2) software, available in
LeCroy X-Stream oscillo-
scopes, includes easy-to- use
modulation analysis capabilities.
Figure 1- Measuring the step
LAB 439 - Control Loop Analysis
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