Jun 10, 2018 - Cuk converters increase the voltage boost ability significantly using the. Steady-state waveforms with enlarged variations for the SLSC.
l was designing a SEPIC converter, driven by 3.7 Sixth is v Li-Ion mobile. Regularity 500kHz, Transformer 10uH per aspect, 1:1 proportion. Ferrite materials #87. Result to be variable by modifying duty period.
It has good efficiency over 80% at 7W. But when I push it to the design goal of 10W, efficiency drops as well much. Analyzed with a fill of 10 ohms and 39 ohms. When responsibility cycle adjusted to raise output making use of either load, the the transformer primary and MOSFET heat up quickly going over 7W. Looking at the MOSFET pipe with a present transformer, I was anticipating to discover a saturating core with present spiking, or increasing drain-source voItage. But no. Observing the empty current influx on the scope, the inductive cost ramp increases as anticipated with elevated output current. As the voItage to the weight is increased by increasing the duty cycle, the inductor current ramp flattens out, and actually the slope reverses! What is definitely the result in?
GárrickGarrick
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