Simplified power supply/Design/Thermal analysis N = turns ration = 4.73 I out fu

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Simplified power supply/Design/Thermal analysis N = turns ration = 4.73 I out full load = 10 A t blocking = 6.3 msec [use this number for ALL calculations] VPP ripple across CF = 3.6 VPP max allowed. beta 2= beta 3 = 25, beta 1 = 80 CF tolerance = -10% + 50% Tj max allowed for Q2 Q3 = 200 degree C max theta jc for Q2 Q3 = 1.2 degree c/w Tj max allowed for Q 2 Q 3 = 200 degree C max theta jc for Q 2 Q 3 = 1.2 degree c/w Tj max allowed for Q 1 = 125 degree C theta jc Q 1 = 3 degree c/w All three transistors are ted on the same heat sink and theta CASE to heat sink = 0.6 degree c/w Assume Tambient = 40 degree C. The nominal value of CF required. The absolute min/max out range possible The worst case guaranteed out range. The worst case theta HS.AIR requirement. Is it reasonable to keep all three transistors on the same heat sink? Explain !!

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