Design och analys av en kompakt DC/DC-omvandlare
Niclas Boklund
Grundnivå (16hp)
kl 11:00, Systemet (På svenska)
[Abstract]A 5 W flyback converter with multiple adjustable voltage outputs in the 5–12 V range
has been constructed. The converter has a switching frequency of 200 kHz and operates
in discontinuous-conduction mode (DCM). A current mode PWM controller has been
used, with feedback delivered using a voltage reference (TL431) and an optocoupler.
Simulations have been carried out to validate the design choices and further develop-
ment of a prototype. The prototype has been measured and an improved final product
has been developed. The resulting efficiency was measured to approximately 87 %,
which is considered an acceptable result for such a low power converter. Some tests
have deliberately been left out. To ensure that the final product will continue to deliver
no matter condition, some additional testing might be required. |