AN EXTREMELY LOW ESR AND ESL ANNULAR FILM CAPACITOR

摘要

Across the industry, the traditional approach to input circuit design of Large Switching PowerSystems is the use of bulk storage Aluminum Electrolytic Capacitors in parallel with banks ofHigh Frequency Bypass Film Capacitors. SBE Inc. has developed an innovative new approachto address problems typically associated with this method. SBE has designed a single annularform factor dry film capacitor, which simultaneously addresses the bulk storage and ripplecurrent requirement. This novel solution allows for a low profile bus structure and inherentlyresults in extremely low ESR and ESL. A design is presented along with data on the RippleCurrent Capability, ESR and ESL as well as other system level thermal managementsimplification possibilities.