基于交错并联Buck变换器新型驱动电路的研究

传统的电压源驱动MOSFET的方式,开关损耗会随着开关频率的增加而显著增加。交错并联技术能够以较低的开关频率实现高频输出电压波动,具有纹波互消、相间分流等优点。在此将一种新型的电流源驱动电路应用于交错并联技术的Buck主电路,在对电路损耗进行详细分析的基础上,设计了在开关频率1 MHz、输入5 V条件下,实现输出1.3 V/20A的电路拓扑,达到了较小电压纹波输出和较高装置效率的要求。

Research on a New Gate Driver Circuit Based on Two Phase-interleaving Buck Converter

With traditional voltage source driver, switching losses are greatly increased with the increasing of switching frequency.The interleaving technique has several advantages such as the high frequency output voltage ripple with lower switching frequency,ripple cancellation,current sharing between the phases.A new circuit of current source driver is applied to a two phase-interleaving Buck converter.A smaller output voltage ripple and high efficiency devices are achieved basing on the analysis of power loss at frequency 1 MHz,5 V input, 1.3 V and 25 A output.