switch realization for dc-dc converters 1. 2 3 4
Post on 13-Dec-2015
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Switch Realization for DC-DC Converters
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(1) diode off, v(t) negative, i(t) is zero
(2) i(t) increases to positive, charging the junction cap. , diode becomes forward biased.
(3) diode on(4) turn off diode,
but the diode remains on while minority charge present in p-n- junction.
(5) until all minority charges (Qr) emoved, then diode is off, i(t) =0
a peak value due to lightly doped n- region exhibits large resistance
tr reverse recovery time
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MOS from ON to OFF
Diode from OFF to ON
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Transistor from OFF to ON
Diode from ON to OFF
Switching loss
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Summary
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