L6470 in HiZ state chip gets hot is it normal?

msciuka9 · ‎2015-06-14

Posted on June 14, 2015 at 20:55

Hello I am new to dSpin, but straight to the question.

I have a L6470h setup on a protoboard using schematics found in the usermanual.

But I see that the chip gets very hot even though it is in HiZ state. I measured the currency that my setup draws so I read ~26mA at HiZ, I have tried to different supply voltages 12V and 24V with both I get the same Iquiescence (but theres a difference in power consumption 0.31W and 0.62W). So as I believe the bridges are completely turned off so does almost all power go to heat? Are those current consumption values are adequate? P.S. I get these values without messing with any configurations straight after power up

Enrico Poli · ‎2015-07-01

Posted on July 01, 2015 at 13:27

Hello,

your consumption is for sure anomalous and in general the IC should not overheating when the power stage is disabled.

Is somesing connected to the VREG pin?

Could you share the schematic of your application?

Enrico