275 C Downhole Switched-Mode Power Supply

Hutchens, Chris ; Madhuravasal, Vijay

Oklahoma State University

关键词: Field Effect Transistors;    Power Supplies;    Transformers;    Temperature Range 0400-1000 K;    Capacitors;   

DOI  :  10.2172/947861
RP-ID  :  None
RP-ID  :  FC26-06NT42948
RP-ID  :  947861

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.