![]() Circuit Diagram PCB Layout Transformer Winding Dataįor the original datasheet please refer to this article.Ģ) Another 12V 1 amp simple SMPS using IC TNY267 How it Works You may also want to read this: 24watt, 12V, 2 amp SMPS using a single IC Most recommended for you. The IC instantly comes into an corrective mode and switches off the input to the primary winding until the output returns to the normal range. When the output voltage tends to rise beyond the set threshold the feed back loop becomes operative and feeds an error signal to the IC FB input. ![]() The feedback loop is implemented via an opto-coupler which becomes active during abnormal circuit conditions. With the coil specs shown the voltage is around 12 and the current is around 1amp.Ī special feedback circuitry is also included in the circuit for maintaining high degree of protection and power saving features. ![]() The voltage induced at the input is effectively stepped down at the output winding, due to low eddy current losses, about 1 amp current becomes available from a relatively tiny ferrite transformer. ![]() The IC also incorporates built in over heat protection which makes the IC virtually indestructible. The IC is absolutely rugged and is internally protected from sudden voltage in rush and other voltage related component hazards.
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