Experiment with the design, modulation and waveforms of the bidirectional Buck or Boost converter. Moreover, choose between classic or synchronous operation (in synchronous mode, the diode is shorted during free-wheeling by the complementary MOSFET).
By default, the circuit opens to a classic Buck converter that converts 5W from a 10V input to a 5V resistive load (switching frequency is 20kHz).
Here are the steps to experiment with the other conversion modes :
1) Define the voltage levels : the voltage on the left VL should be higher than on the right VR.
2) Set the Width of the pulsed voltage source (Duty ratio) equal to VR/VL).
3) Choose the power direction
*Buck mode (Left => Right)
Set the Left side switch to the VL source & the Right side switch to the Resistor.
*Boost mode (Left <= Right)
Set the Left side switch to the Resistor & the Right side switch to the VR source.
4) Set the power level by adjusting the resistor value : R=V^2/P.
5) Select the operation mode
Classic Buck : Open the lower MOSFET switch.
Classic Boost : Open the upper MOSFET switch
Synchronous :Close both MOSFET Switches.
6) Press START and visualize the waveforms during transient and steady-state operation.
