| 摘要 |
A novel inductive overvoltage suppression circuit for power converters is presented. High amplitude voltage spikes are generally occurring in high frequency power converters in presence of small parasitic inductances coupled to the power distribution rails, in correspondence of the switching transitions, particularly when high load currents are required. The presented invention proposes active clamps to limit the amplitude of the overvoltage. Furthermore the excess energy in the parasitic inductances is utilized to provide energy and/or a signal to determine when to turn on the next phase power device with the fastest transition possible without incurring in cross-conduction currents in the power stage of the converter, thus improving its overall performance, and circuit reliability in addition to achieving high conversion efficiency. |
