LMG2650: current sense emulation

jerome tual

Part Number: LMG2650

Tool/software:

Hi,

I use 2 LMG2650 in a Full bridge configuration :

can I connect the CS pairs together ? I would like to be sure that the current sense emulation of the LMG2650 will not disturbed by its neighbor, e.g : gain, .... as the both low side are not On in the same time.

Thanks,

Jerome

5 months ago

0 John Gomez 5 months ago

TI__Expert 4955 points

Hi Jerome,
Yes, the two current outputs can add together to feed the current sense resistor. It is recommended to add diodes here.

Thanks,

John

0 jerome tual 5 months ago in reply to John Gomez

Prodigy 250 points

Hi,

add a serie diode to protect the CS output of the GaN, right ?

The forward voltage of the diode will change the measure as the Vf is not constant : not the same Vf between each diodes, depends also of the current,....

The plan is measure a current from 1 to 10A, with a large dynamic.

0 John Gomez 5 months ago in reply to jerome tual

TI__Expert 4955 points

I see, given these additional considerations, you can omit the diodes.

Thanks,

John

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LMG2650: current sense emulation