Title :
SPICE analysis of RL and RC snubber circuits for synchronous buck DC-DC converters
Author :
Blecic, Raul ; Gillon, Renaud ; Nauwelaers, Bart ; Baric, Adrijan
Author_Institution :
Fac. of Electr. Eng. & Comput., Univ. of Zagreb, Zagreb, Croatia
Abstract :
Operation of a 1.3-MHz, 12-to-1.2 V, 20-A synchronous buck converter is analyzed by SPICE simulations. Special attention is given to two resonances formed by the capacitance of FETs in the off-state and the total inductance of the input decoupling network. The resonances are the main source of the broadband electromagnetic (EM) interference. Two most common circuit level methods for reducing the EM interference, an RL snubber circuit and an RC snubber circuit, are analyzed and compared in terms of their impact on the radiation characteristics, efficiency and reliability of the analyzed synchronous buck converter.
Keywords :
DC-DC power convertors; RC circuits; RLC circuits; electromagnetic interference; field effect transistors; snubbers; FET; RC snubber circuits; RL snubber circuits; SPICE analysis; circuit level methods; current 20 A; electromagnetic interference; frequency 1.3 MHz; synchronous buck DC-DC converters; voltage 12 V to 1.2 V; Field effect transistors; Inductance; Integrated circuit modeling; RLC circuits; Reliability; Resonant frequency; Snubbers; conversion efficiency; electromagnetic (EM) interference; radiated emissions; reliability; switching-mode power supply (SMPS);
Conference_Titel :
Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2015 38th International Convention on
Conference_Location :
Opatija
DOI :
10.1109/MIPRO.2015.7160245
