Viper265KD - How can I make a 5V design with this IC while it's VDD treshold max is 14V and supplied from output voltage.

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I have a 85-265AC input and desired to have 5 volt output buck converter.

How can I make the viper265kd to perform 5V output?

When I check AN5380 the VDD is supplied by output voltage which is 15V and it's enough to supply VDD min requirements.

I need 5V output converter which is not enough to meet with VDDmin value, how can I supply VDD in a 5V output converter.

AC-DC conversion

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Peter BENSCHBest answer

ST Technical Moderator

The AN5380 is just an evaluation of a non-isolated AC/DC converter.

Of course, depending on your needs, you can choose between isolated and non-isolated buck regulator. For your design, you should use the free eDesign suite, which can also save your designs when you sign up.

An example schematic for a non-isolated buck for your input and 5V, 200mA could be:

When your question is answered, please close this topic by choosing Select as Best.

/Peter

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