LMG2650: Aux operating current

jerome tual

Prodigy 250 points

Part Number: LMG2650

Tool/software:

Hi,

I would like to know the operating current on Auxiliary voltage rail. It is still TBD on the datasheet:

Thanks,

Jerome

6 months ago

0 Zachary Soviero 6 months ago

TI__Expert 4510 points

Hello Jerome,

The LMG2650 device is still preliminary, meaning our validation team is still finalizing data which will be included when the device is fully released.

For now however, you can reference data from LMG2640 which will have similar Aux operating current. Figure 5-20 includes the full data:

Thanks,
Zach Soviero

0 jerome tual 6 months ago in reply to Zachary Soviero

Prodigy 250 points

Hi,

Ok, and do you data above 1Mhz ? We plan to use it until 5Mhz.

Thanks,

Jerome

0 John Gomez 6 months ago in reply to jerome tual

TI__Expert 4855 points

Hi Jerome,

We do not have data collected beyond 500kHz. However, given that the AUX current vs. switching frequency dependency is linear, you may interpolate the graph above to calculate the proportional AUX operating current at 5MHz.

The characteristic is linear because the current draw is primarily affected by the switching frequency dependent gate driving loss.

Thanks,

John

0 jerome tual 6 months ago in reply to John Gomez

Prodigy 250 points

OK thanks,

Power management

Power management forum

LMG2650: Aux operating current