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Power Supply Cookbook, 2nd Edition
book

Power Supply Cookbook, 2nd Edition

by Marty Brown
June 2001
Intermediate to advanced content levelIntermediate to advanced
280 pages
10h 38m
English
Newnes
Content preview from Power Supply Cookbook, 2nd Edition
“Black box” predesign considerations
1. Rated output power: P
o
= (28 V)(10 A) = 280 W
2. Estimated input power: P
in(est)
= 280 W/0.8 = 350 W
3. DC input voltages (a voltage doubler is used for 110 VAC)
a. From 110 VAC: V
in(low)
= 2(1.414)(90 VAC) = 254 VDC
V
in(hi)
= 2(1.414)(130 VAC) = 368 VDC
b. From 220VAC: V
in(low)
= 1.414(185 VAC) = 262 VDC
V
in(hi)
= 1.414(270 VAC) = 382 VDC
4. Average input currents (dc)
a. Highest average: I
in(max)
= 350 W/254 VDC = 1.38 A
b. Lowest average: I
in(min)
= 350 W/382 VDC = 0.92 A
5. Estimated maximum peak current I
pk
= 2.8(280 W)/254 VDC = 3.1 A
Design decisions
This is going to be a current-mode controlled half-bridge topology. ...
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Publisher Resources

ISBN: 9780750673297