EE467-567'10_lect2-Fnl

EE467-567'10_lect2-Fnl - EE 467/567 INTEGRATED POWER...

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EE467/567 Integrated Power © 2010, D. C. Hopkins [email protected] EE 467/567 -- INTEGRATED POWER EE 467/567 -- INTEGRATED POWER ELECTRONICS ELECTRONICS Dr. Douglas C. Hopkins Dept. of Electrical Engineering University at Buffalo [email protected] EE467/567 Integrated Power © 2010, D. C. Hopkins [email protected] Review last lecture Review last lecture Major equations of life. Real circuit capacitance

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EE467/567 Integrated Power © 2010, D. C. Hopkins [email protected] Power electronic circuit V IN + ! V OUT C L The MAJOR equations that guide your career v(t) = L " # \$ % & i(t) = C " # \$ % & E L (t a ) = L i(t a ) [ ] 2 Do Do ’s and Don s and Don ’ts of power switching ts of power switching E C a ) = C v(t a ) [ ] Consider current source drive. EE467/567 Integrated Power © 2010, D. C. Hopkins [email protected] Capacitance per square area C = " 0 " r A / d " = 8.84 x 10 -15 F/mm Inter-conductor capacitance? …Negligible Example: l = 2.54 mm (100mils) t = 34.0 μ m (1.34mils) d = 254 μ m (10.0mils) C = 3.01 fF (scope probe is 10pF) Conductor (Top) Conductor (Bottom) Insulator d A t l d Capacitive Effects Capacitive Effects
EE467/567 Integrated Power © 2010, D. C. Hopkins [email protected] Substrate Coupling Example Conductor #1: 0.1x1 inch (2.54 x 25.4 mm) Conductor #2: 0.4 x 1 inch (10 x 25.4 mm) Substrate: Ceramic loaded polymer, 3 mils thick , !

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EE467-567'10_lect2-Fnl - EE 467/567 INTEGRATED POWER...

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