LM74930-Q1: Can two components be connected in parallel and current share

Hi Richard,

Yes, 2x controllers can be paralleled. Although it is important to note that there is not active load sharing feature. Whatever sharing may happen will be by force of nature if path impedances of both the controllers are equal. Otherwise, only one of the path will power entire load and second path will be turned-off due to reverse current blocking.

Regards,

Shiven Dhir

I was hoping for some suggestions to support some rough current sharing.  The current design will be two separate modules where the component supports internal current usage and external loads. The internal current requirements of the individual modules will not be identical.  However they support external loads on a CANBUS that are identical except for minor wiring resistance.  Could a diode be used for the external loads isolating these two modules or is there a recommended current sharing component needed instead of just diode isolation.

Hi Richard,

What is your input voltage and current ratings?

Regards,

Shiven Dhir

The module operates in either a 12V or 24V automotive system. It supplies internal circuitry (probably 250mA),  Six TI efuse components that can deliver 5A each (usually only one operated at a time but occasionally all 6 will be operated simultaneously) and up to six external control panels at 500mA each.  We have a load dump design incorporating external back to back N-Channel FETS that will support 68A continuous at 100C with a proper heat sinking. I have attached our circuit. VIN_Protected drives the internal circuitry and eFuse components. Main_VCC  drives the CANBUS power where two modules could be connected in parallel

Hi Richard,

The schematic looks fine, just jeep the thermal pad floating.

For such voltage range, we do not have an active current sharing controller.

Regards,

Shiven Dhir