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Boost Converter power dissipation calculation

FormerMember
FormerMember over 7 years ago

I have designed a boost converter with a ramp input of 1MHz. I need to find out the power dissipated at different modules (like error amplifier, boost cell, comparator etc.) separately. If I use simple DC analysis, and power calculation, I get a wrong value since the boost cell transistor keeps switching with ramp signal frequency. May I know the steps to do this. I am using Cadence virtuoso for simulation.

  

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  • Saloni Chhabra
    Saloni Chhabra over 7 years ago

    Hi,

    Using ADE, you can go to menu Outputs -> To be saved -> select by subckt instance. It opens up a new assistant where for every selected instance, you can choose to save V, I, pwr by enabling the checkboxes. In Spectre netlist, the equivalent command will be e.g. 'save I0.inst_boost_cell:pwr'.

    Regards,
    Saloni

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  • FormerMember
    FormerMember over 7 years ago in reply to Saloni Chhabra

    Dear Saloni,   I was told to do PSS analysis instead of DC analysis to compute power dissipation. After that I followed the steps you suggested: Outputs -> To be saved. Then selected subcircuits from the schematic editor. But a new assistant doesn't open up as you said.

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  • Saloni Chhabra
    Saloni Chhabra over 7 years ago in reply to FormerMember

    Which IC version are you using? Assuming you are on ADE-L, here's a snapshot of 'Save by Subckt Instances' window.

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  • FormerMember
    FormerMember over 7 years ago in reply to Saloni Chhabra

    Dear Saloni,

            Still I didn't get what's the problem with my work. I will share the my screen shots so that it may help to pinpoint where I have gone wrong.

    I am using IC version  IC6.1.6

    My ADL window looks like this.

      When I run this simulation, I get an error saying ERROR (SPCRTRF-15044): pss analysis did not converge. 

    Can you please tell me where have I gone wrong?

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