Part Number: DRV8350R
I have been design a schematic for this controllers,
every functionality is working fine but the IC is over heating(78 deg/celsius) for some reason,
I'm thinking about one of the three pins( Mode,VDS , IDrive) especially the IDRIVE , or could it be the INHX /INLX that cause the heating problem,
Added a reference schematic,
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In reply to Anthony Lodi:
thanks for your response,
im using both DRV8350RH & DRV8350H
Im using this FET BSC070N10LS5ATMA1 by infenion,
VM\VDRAIN is at 42 Volts, the rest i need to check again but nothing that is not compatibe to the datasheet,
I pulled it up to 5V2 because it is my Digital VDD for this circuit, is it Ok ?
3. Voltage rating- vcp: 25V ,cph-cpl: 100V, vgls:25V ,DVDD: 25V
In reply to avihay Avniel:
Thank you for the additional information!
i dont understand how the idrive is causing the heating problem if it happens when changing enable to be active , in this stage there is no PWM to the motor and no current is passing through the FET's
5V2 is my 5V controlled voltage, to be precise its 4.96V and DVDD is not really equal to it, is it possible that its causing internal current between 5V2 and DVDD that cause this heating problem?
I have 40 ohm serial resistance on each gate.
Any Advise regarding this ?
thanks in advance
I would need to check with the design team to analyze the effects of using 5V2 instead of DVDD, and whether or not that would result in any unwanted current. I would recommend tying the pull up resistors of the MODE, IDRIVE, and VDS to DVDD since this is what the datasheet recommends and there may be some unintended effects of tying them to 5V2.
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