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      • 15. Re: PSOC 5LP as power discharge controller
        LePo_1062026

        Ninatan,

         

        If you want 10us or better for a PGOOD signal when the main rail reaches 3.3V*90% (or higher), simply place the main rail on the '+' terminal of a comparator and a VDAC8 set at 3.0V the '-' terminal.  PGOOD would be the output of the comparator.  It should respond in <0.2us in low power mode.

         

        Len

        • 16. Re: PSOC 5LP as power discharge controller
          NiNa_4043086

          Hi Len,

          I thought about it too. But it is more complicated than that because I need to measure more than one voltage (up to 4 at a phase) and I will need 4 VDAC. Where did you see the 0.2us respond?

           

          Regarding the test, I have changed the input clock frequency to 24MHz and filtering to none. The response time was improved to 1ms.

           

          Regarding the example project you have sent me, I I can't open the project files (all but the .cyprj). I am using PSOC creator 2.1

          • 17. Re: PSOC 5LP as power discharge controller
            LePo_1062026

            Ninatan,

             

            The 0.2us response comes from the datasheet for the comparator:

            I'm glad to see that 1ms is better than 10ms.  Try adding some averaging to see if the time increases.  This is a good test even if it's for educational purposes only.

             

            I created it under Creator 4.2.  It is a very stable and full featured version.  I recommend this version.

            If I understand the back channel discussions, this may be the last release of Creator.  Cypress might be enhancing their new tool "ModulusToolBox" to allow for incorporating their other acquired products.

             

            Len

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