Several factors contribute to this including, but not limited to, switching frequency, output capacitance, inductor, load and any current limiting features of the control circuitry.

Assuming the output current and voltage have negligible ripple, the load of the converter can be considered purely resistive. Find some of the lowest I Q products in our buck converter portfolio below including the TPS62x family of low-power converters with DCS control technology and the world's lowest I Q switching regulator, the TPS62840.

During on-state, the source may need to momentarily provide more current than its rating for constant load allows, but the on-time is too short for the source to take damage. So, in steady state operation of the converter, this means that | I o | {\displaystyle \scriptstyle \left|I_{o}\right|} equals 0 for no output current, and 1 for the maximum current the converter can deliver. From this equation, it can be seen that the output voltage of the converter varies linearly with the duty cycle for a given input voltage. We note from basic AC circuit theory that our ripple voltage should be roughly sinusoidal: capacitor impedance times ripple current peak-to-peak value, or Δ V = Δ I / (2ω C) where ω = 2π f, f is the ripple frequency, and f = 1/ T, T the ripple period. Nos kits solaires photovoltaïques sont classés par utilisation afin de vous permettre de trouver plus rapidement la solution qui vous convient.

the normalized current, defined by | I o | = L T V i I o {\displaystyle \left|I_{\text{o}}\right|={\frac {L}{TV_{\text{i}}}}I_{\text{o}}} . Continuous mode [ edit ] Fig 3: Waveforms of current and voltage in a buck–boost converter operating in continuous mode. The only difference in the principle described above is that the inductor is completely discharged at the end of the commutation cycle (see figure 5). These assumptions can be fairly far from reality, and the imperfections of the real components can have a detrimental effect on the operation of the converter.

One possible drawback of this converter is that the switch does not have a terminal at ground; this complicates the driving circuitry. This assumption is acceptable because an inductor is made of one long wound piece of wire, so it is likely to exhibit a non-negligible parasitic resistance ( R L).