DRV8256: Decay Inquiry

Renan Santos Adriano

Part Number: DRV8256

Hello Team,

My customer wanted to get more details on the various decay modes and what they mean for current regulations. There are multiple mixed decay options but some are 30% and others are 60%? what does the fast percentage mean? Does this mean the fast decay only occurs at % of the target current and then back to slow decay?

Regards,

Renan

over 3 years ago

+1 Pablo Armet over 3 years ago

TI__Mastermind 37683 points

Hi Renan,

The percentage in mixed decay is the percent that the H-bridge will be in fast decay. For example, if mixed decay is 60%, fast decay will occur 60% while the remaining 40% will be slow decay.

This app-note explains in detail the various current regulation and decay modes in most of our stepper drivers.

Regards,

Pablo Armet