275 C Downhole Switched-Mode Power Supply | Zendy

Chris Hutchens | Zendy; Vijay Madhuravasal | Zendy

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275 C Downhole Switched-Mode Power Supply

Author(s) -

Chris Hutchens,

Vijay Madhuravasal

Publication year - 2008

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/947861

Subject(s) - electrical engineering , jfet , capacitor , engineering , amplifier , switched mode power supply , electronic engineering , buck converter , switched capacitor , transistor , voltage , field effect transistor , cmos

A vee-square (V2) control based controller IC is developed for a switch mode power supply capable of operating at extreme temperature/harsh environment conditions. A buck type regulator with silicon carbide power junction field effect transistors (JFET) as power devices is used to analyze the performance of controller. Special emphases are made on the analog sub-blocks--voltage reference, operational transconductance amplifier and comparator as individual building blocks. Transformer coupled gate drives and high temperature operable magnetic cores and capacitors are identified and tested for use in the design. Conventional ceramic chip packaging of ICs combined with lead carrier type mounting of passive filter components is introduced for hybrid packaging of the complete product. The developed SMPS is anticipated to support the operation of down-hole microcontrollers and other electronics devices that require low/medium power filtered dc inputs over an operating temperature of 275 C

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