Single Loop System

The Single Loop System option is used when the power supply includes one compensator with a single feedback loop. For example, a voltage mode (VM) step-down or Buck converter (see figure) where the output voltage is monitored via the feedback resistor divider network and compared against a reference/setpoint voltage. Based on the measured error, the compensator calculates the PWM duty cycle to ensure that the output voltage is well regulated.

As an example, provided here is the simplified diagram of a voltage mode buck converter controlled by a Type III analog compensator, where the DCDT can calculate the Digital Compensator coefficients to represent the equivalent controller using a microcontroller.

dcdt-voltage-mode-buck-converter.PNG

The DCDT GUI represents the system using the following block diagrams, where each block diagram must be defined by the designer based on the hardware topology and design:

DCDT-Single-Loop-System.PNG
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