Title :
A High Efficiency Synchronous Buck VRM with Current Source Gate Driver
Author :
Eberle, Wilson ; Zhang, Zhiliang ; Liu, Yan-Fei ; Sen, P.C.
Author_Institution :
Queen´´s Univ., Kingston
Abstract :
In this paper, a new current source gate drive circuit is proposed for high efficiency synchronous buck VRMs. The proposed circuit achieves quick turn-on and turn-off transition times to reduce switching loss and conduction loss in power MOSFETS. The driver circuit consists of two sets of four control switches and two very small inductors (typically 50 nH-300 nH each at 1 MHz). It drives both the control MOSFET and synchronous MOSFET in synchronous buck VRMs. An analysis, design procedure, optimization procedure and experimental results are presented for the proposed circuit. Experimental results demonstrate an efficiency of 86.6% at 15 A load and 81.9% at 30 A load for 12 V input and 1.3 V output at 1 MHz.
Keywords :
driver circuits; power MOSFET; power semiconductor switches; switching convertors; voltage control; voltage regulators; VRM; conduction loss; control switches; current 15 A; current 30 A; current source gate driver circuit; efficiency 81.9 percent; efficiency 86.6 percent; frequency 1 MHz; inductors; power MOSFET; switching loss; synchronous MOSFET; synchronous buck converter; voltage 1.3 V; voltage 12 V; voltage regulator module; Buck converters; Driver circuits; Inductance; Inductors; MOSFETs; RLC circuits; Switches; Switching frequency; Switching loss; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2007.4341954
