DC DC converter operating principle and functionality

DC DC converter operating principle and functionality

DC TO DC boost converter

In DC to DC converter, the converter operates in two modes:

 

  • Continuous Conduction Mode
  • Discontinuous Conduction Mode

 

The continuous conduction mode circuit of the DC to DC boost converter is shown in the figure that consists of an inductor, capacitor, switching device, diode, and input voltage source. This boost converter circuit switch is controlled using a pulse width modulator (PWM). If this switch is in ON state, then energy will be developed in the inductor and thus more energy will be delivered to the output.

The discontinuous conduction mode circuit of the DC to DC boost converter is shown in the figure that consists of elements such as capacitor, inductor, voltage source, diode, and switching device. In this discontinuous conduction mode, if the switch is in ON state, then energy will be delivered to the power storage element, inductor. If the switch is in OFF state for some period, then the inductor current will reach zero until the next switching cycle is on. Thus, the capacitor gets charged and discharged with respect to the input voltage. But, here the output voltage in discontinuous conduction mode is less than the output voltage in continuous conduction mode.

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