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The development of a 100 KHZ switched-mode power supply
Author(s)
Gärtner, Andy Michael
Date Issued
1991
Type
Thesis
Publisher
Cape Technikon
Abstract
At the time of the design the maximum allowable operating
frequency for an output power of between 200 and 250 watts
was 100 kHz. Although a 600 kHz operating frequency could
have been achieved, it would only be at a very low output
power level.
To maximise the current components available, a 210 watt
100 kHz direct-off-line switched-mode power supply was
developed. The design presented can be used to power any
compatible IBM XT/AT personal computer.
The prototype was tested. An overall efficiency of 61% was
achieved. The final prototype required 1 521 cm3 and weighed
approximately 980 g, representing a power to volume ratio of
0.14 W/cm3 (2.26 W/inch3).
Detailed procedures are also presented to help with the
design and selection of the reactive components.
Special design features include the half-bridge push-pull
topology, MOSFETS as power switches, digital current
limiting, primary power limiting, multiple outputs and fault
counting to name but a few.
frequency for an output power of between 200 and 250 watts
was 100 kHz. Although a 600 kHz operating frequency could
have been achieved, it would only be at a very low output
power level.
To maximise the current components available, a 210 watt
100 kHz direct-off-line switched-mode power supply was
developed. The design presented can be used to power any
compatible IBM XT/AT personal computer.
The prototype was tested. An overall efficiency of 61% was
achieved. The final prototype required 1 521 cm3 and weighed
approximately 980 g, representing a power to volume ratio of
0.14 W/cm3 (2.26 W/inch3).
Detailed procedures are also presented to help with the
design and selection of the reactive components.
Special design features include the half-bridge push-pull
topology, MOSFETS as power switches, digital current
limiting, primary power limiting, multiple outputs and fault
counting to name but a few.
Additional information
Thesis (Masters Diploma (Electricity Engineering) -- Cape Technikon, Cape Town,1991
Subjects
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The development of a 100KHZ switched - mode power supply.pdf
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