| 摘要 |
The disclosed embodiments relate to a power converter system. This power converter system includes an inductor which is coupled between an input that receives an input voltage Vin and a peaking node. The system also includes a low-side switch and a high-side switch, wherein the low-side switch is coupled between the peaking node and a base voltage, and the high-side switch is coupled between the peaking node and an output that produces an output voltage Vo. The system additionally includes a controller which cycles the low-side switch between on and off states with a cycle time Tcycle. During the on state, the inductor current can flow through the low-side switch to the base voltage, and during the off state, the inductor current can flow through the high-side switch to the output. Moreover, during the off state, the controller waits to turn on the low-side switch until the inductor current IL decreases from a peak current Ipk to zero and then goes negative. This negative inductor current resonantly discharges power through the input, wherein at least some of the resonantly discharged power is recovered after the low-side switch is turned on. |
