An Improved Isolated MOSFET Gate Driver Scheme for Wide Duty Cycle Applications
نویسنده
چکیده
An improved transformer coupled gate driver scheme for high speed switching applications in power supply or motor drive is proposed in this paper. It improves the deficiencies caused by the conventional transformer coupled gate driver scheme, such as oscillation of the output PWM signal that will make MOSFET improper turn-on, when the duty cycle of input PWM signal reduces from large value to small value suddenly or turn off. Good performance is achieved using this driver scheme in a digital controlled synchronous rectifier (SR) Buck converter. Operation principle of the proposed scheme is described. Design procedure and experiment results of the scheme are explained and provided in details. Keywords-driver scheme;isolated mosfet gate drive; wide duty cycle; high frequency
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