MOSFETS Rds(on)=0.112 Vmax 300V Imax = 20A ton = 200ns: toff = 300ns BJTS VCE(sat) = 0.85V Vmax=300V Imax = 20A ton = 20

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Mosfets Rds On 0 112 Vmax 300v Imax 20a Ton 200ns Toff 300ns Bjts Vce Sat 0 85v Vmax 300v Imax 20a Ton 20 1 (44.02 KiB) Viewed 26 times

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Q1
A Power device operating at 5kHz switches a constant current
source load of 60A across a de supply of 200V with a duty cyde of
30%. Devices with characteristics given in Table Q1 are available
for this application. The basic circuit
diagram is shown in Fig Q1.
a.
Select suitable devices from Table Q1 and suggest any (20
Marks)
modification needed to fit this application
b.
Calculate the converter efficiency and heat dissipation (20
Marks)
requirement Provide driving circuit and considerations C.
Total
(10 Marks) (50 Marks)
MOSFETS Rds(on)=0.112 Vmax 300V Imax = 20A ton = 200ns: toff = 300ns BJTS VCE(sat) = 0.85V Vmax=300V Imax = 20A ton = 200ns: toff=300ns Table Q1. Device Parameters Diodes Vfwd -0.3V Imax=20A Vmax = 300V Rf=10m2 Vdc A (1) Ιο S1 OV Fig. 01: Basic circuit