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LM5032: What happens when the input voltage of the LM5032 exceeds the output voltage?

fujita michitaka
Prodigy 160 points
Part Number: LM5032

There was a previous answer that the LM5032 can also be used with DC input.
How does the LM5032 operate when the input voltage of the LM5032 rises and exceeds the output voltage setting voltage DC 400V?

  • 0
    TI__Mastermind 34465 points

    Hello michifuji,

    The LM5032 is a dual interleaved PWM controller and the operation of the LM5032 in the situation you describe really depends on how the controller is configured.
    For example in the datasheet the controller is configured in the  forward topology.
    This means that Vout = N*D*Vin so if the turns ratio (N) is greater than 1 then Vout can be greater or less than Vin by controlling the duty cycle from approx. 1 to very low values.
    You can also get Vout to be less than or greater than Vin with a flyback topology.

    400V is a very high output voltage. What is your application and what is your input voltage range ?

    Regards

    John

  • 0 in reply to John Griffin1
    Prodigy 160 points

    Thank you for your reply.
    The input voltage is DC 150V - 800V.
    Application is battery related.

  • 0 in reply to fujita michitaka
    TI__Mastermind 34465 points
    Hello michifuji,
    I believe I answered your question in my original posting so I will close out this thread.
    If you have a further query then please open a new thread.
    Regards
    John