A Novel Soft-Switching Synchronous Buck Converter for Portable Applications

Figure 4

Simulated voltage and current waveforms: (a) main switch $\text{S}$: $V_{\text{S}}$, $I_{\text{S}}$; (b) synchronous switch ${\text{S}}_1$: $V_{\text{S}1}$, $I_{\text{S}1}$; (c) diode $D_{\text{S}1}$ and capacitor $C_{\text{r}}$; (d) capacitor $C_{\text{b}}$ and diode $D_{\text{S}3}$.

(a)

(b)

(c)

(d)