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[L6472] 1.3A output when power on without chip init

Question asked by fung.edward.001 on May 12, 2016
Hi,

We got a problem for L6472 chip when power on, the H-bridges is ON with default current output at 1.31A while the /STBY\RST=VDD  and SW = 0V states.  However, when the  /STBY\RST=VDD  and SW = VDD, the H-bridges keep at Hi-Z state without any current output.

This 1.3A current causes 0.5A motor damage when  at home position (SW=0V) when power up. 

Does the chip behaviour is normal? and any workaround to eliminate this?

Thanks,
Edward

 


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