MOSFET的諧極驅動

摘要：高頻開關電源都會有較大的驅動損耗，本文提出諧振驅動技術，它可以進行在沖放電過程中進行有效的能量恢復。在對門極驅動損耗進行簡單的介紹以后，本文將會提出一個新的電路，該電路有著低驅動損耗、開關速度快、驅動電壓鉗位和防止誤導通等功能 而且它沒有占空比限制。 敘詞：DC—DC功率變換器，高頻狀態，功率MOSFET，脈寬調制，諧振變換器。 Abstract：：High frequency pulse-width modulation (PWM) converters generally suffer from excessive gate drive loss. This paper presents a resonant gate drive circuit that features efficient energy recovery at both charging and discharging transitions. Following a brief introduction of metal oxide semiconductor field effect transistor (MOSFET) gate drive loss, a new resonant MOSFET gate drive circuit is then presented. The new circuit produces low gate drive loss, fast switching speed, clamped gate voltages, immunity to false trigger and has no limitation on the duty cycle. Experimental results further verifyits functionality. Keyword：DC–DC power conversion, high frequency, power MOSFET, PWM, resonant gate drive.