DRV8328: GVDD for external load

Shotaro Sakai

Expert 3410 points

Part Number: DRV8328

Tool/software:

Hello team,

My customer is considering the below usage. What do you think?

GVDD is connected to external load (~10mA)
FET (for motor) and external load driving do not do at the same time.

Best regards,

Shotaro

9 months ago

0 Ryan Kehr 9 months ago

TI__Guru 55615 points

Sakai-san,

It is US holiday now, so will need some time to investigate when team is back in office on Monday. You just sent block diagram. Is there a schematic showing connection to external circuitry from GVDD?

Regards,

Ryan

0 Shotaro Sakai 9 months ago in reply to Ryan Kehr

TI__Expert 3410 points

Ryan-san,

I checked but they cannot disclose the load in detail. But they shared some information.

Load: FET driving for a brushed motor
Current capability: The peak current is 10mA. So RMS is lower than 10mA.

Best regards,

Shotaro

+1 Ryan Kehr 9 months ago in reply to Shotaro Sakai

TI__Guru 55615 points

Sakai-san,

As long as external loading is only during time when internal gate driver FETs are not switching, I don't see a problem with this use case. It is a smart idea to save an external regulator.

Regards,

Ryan

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DRV8328: GVDD for external load