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  • Generic PD and Flyback Converter

  • Created: May 17, 2017

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Summary

Having simplicity to its topology and ease of its design makes flyback converter popular in low output power range. Fly-back converters are widely utilized SMPS circuit that is used for low output power applications where the output voltage needs to be isolated from the input main supply. The output power of fly-back type SMPS circuits may vary from few watts to less than 100 watts. Input to the circuit is generally unregulated dc voltage obtained by rectifying the utility ac voltage followed by a simple capacitor filter. The circuit established offers either single or multiple isolated output voltages and can operate over wide range of input voltage variation.



The circuit comprises with TPS23753PW, a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller that is specifically for isolated converter designs, two HD01-T that enables voltage to be applied across a load in either direction and uses SMAJ58A to protect the powered-device (PD) controller front-end from overvoltage due to line transients, hot plug into 48-V sources, and output fault.



Taking advantage with the use of FDC2512 improves the overall efficiency of DC/DC converters using either synchronous or conventional switching PWM controllers. In addition, using TPS23753PW ease power-source control problems.

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