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TPS560430: Quick question on tON tOFF spec.

Part Number: TPS560430

Hi 

I saw in datasheet the tON_MAX is 7.5us. under which condition will  tON_MAX approach 7.5us. 

Also the tON_MIN and tOFF_MIN spec are 2.1MHZ and 1.1MHZ  device has the same spec ? 

 

  

 

 

  • Hi PYTai,

    tON_MAX approach 7.5us for conditions : VIN = 4 V to 36 V.
    Yes, the tON_MIN and tOFF_MIN spec are 2.1MHZ and 1.1MHZ device has the same spec .


    Gavin
  • In reply to Gavin Wang (Zejing):

    Hi Gavin,

    Sorry did not make it clear to my question.

    If tON = 7.5us the switching frequency may not be kept at 1.1MHz or 2.1MHz. Under which condition will tON approach 7.5us? thanks!
  • In reply to PYTsai:

    Hi PYTai,

    Firstly, if IC hits toffmin, the switching frequency will become low enough to support the Vo and ton will become larger.
    Secondly, if Ton hits tonmax, Vo will drop. So tONmax = 7.5us does nothing with the switching frequency 1.1MHz or 2.1MHz.

    Gavin

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