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The full-scale (100%) chopping current setting of DRV8880

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Dear Motor support team,

I set the IFS to be 2.0A maximum peak current with 3.3V Vref,  250*10^-3ohm Rsens and 100% TRQ setting.

I confirmed IFS setting with P.18 in www.ti.com/.../drv8880.pdf.

However I observed about 1.4A peak current at 800pps and 1.17A  at 3000pps respectively.

Why I can not obtain 2.0A peak current in this conditions?

Please confirm the attached file.

Yohjiro Kawai,

(Please visit the site to view this file)

 


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