Title :
Multiphase 48 volt conversion for low noise applications in an instrument grade power supply
Author :
Emmons, Thomas R.
Author_Institution :
Teradyne Corp., Fridley, MN, USA
Abstract :
This paper presents a switching power supply design that meets the accuracy, response time, noise level, and current requirements for today´s ATE instruments. It focuses on minimizing high frequency parasitic ringing at the switching waveform edges that interferes with the linear regulator output. The noise reduction features include a transformer with flat planar construction of interleaved coils, a full-bridge with zero-volt switching for the primary control of the transformer, multi-phase circuits to enable maximum response time, and ferrite beads on all switches to control ringing.
Keywords :
switched mode power supplies; transformers; zero voltage switching; 48 V; instrument grade power supply; linear regulator output; noise reduction; primary control; response time; switching power supply design; transformer; zero-volt switching; Coils; Delay; Ferrites; Frequency; Instruments; Noise level; Noise reduction; Power supplies; Regulators; Switching circuits;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1453219
