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BLDC Driving whith A3930

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Rafael-Rabbani

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Hi,

Please use the datasheets directely from the manufacturer.
Here you get the latest informations.
https://www.allegromicro.com/~/media/Files/Datasheets/A3930-1-Datasheet.ashx?la=en

Klaus

- - - Updated - - -

If you need help....you need to provide informations first.

Where do you measure the current?
What motor do you use?
What supply voltage?
What driving parameters?
What power supply?
And so on...

This, and more, will influence current.

Klaus
 

The datasheets are exactly the same...
I'm applying the schematic the datasheet said exactly, the difference is only the 16.5V supply voltage and the PSM N0R9 MOSFET.
 

Hi,
The datasheets are exactly the same...
Yes. Now. But what will be in a year?. If the original datasheet was updated .. are you sure the "second hand" datasheet is updated, too.
Will the link to the second hand datasheet still be alive?

I'm applying the schematic the datasheet said exactly,
Many posters - having a problem with a circuit - say the same.
But then if we have a look at their true schematic and PCB layouts we see a lot of differences.
(wrongly placed capacitors, bad PCB wires routing, changed signal timings...)

Imagine: If your car doesn´t work, what do you give to the service garage? The defective car, or just the operating manual of the car?

You refuse to give necessary informations about your motor. And you refuse to give informations about switching frequency (Rt, Ct). Both are not given by the datasheet.
--> Therefore I´d say it´s impossible to help.

Klaus
 

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