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App note: Power factor correction with ultrafast diodes

App note: Power factor correction with ultrafast diodes

Vishay’s app note in keeping the power supplies’ power factor in check with their ultrafast diodes. Link here (PDF)



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More and more switched mode power supplies (SMPS) are being designed with an active power factor correction (PFC) input stage. This is mainly due to the introduction of regulations aimed at restricting the harmonic content of the load current drawn from power lines. However, both the user and the power company benefit from PFC, so it just makes good sense.

 




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