ucd3138 intergrater saturate question!

you lee1

Other Parts Discussed in Thread: UCD3138

when the CLA into open loop, the CLA return back to closed loop, result to the output voltage have overshoot!

i try to clamp Filter_Yn_High and KI_High, do not have any effect!

this question how to solution?

0 FanW over 12 years ago

Hi You,

You mean when you try to close the loop, there's overshoot on the Vout?

The filter should be pre-setted before you close the loop.

If you have UCD3138 EVM firmware, you can search for function preset_filter0() or preset_filter1() and see what's in there.

Regards,
Fan

0 you lee1 over 12 years ago in reply to FanW

you are right, i did it and the module is work correct!

thanks

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