BQ25570: Multiple device with Single Storage element.

Dilip Namdeo Mohol

Intellectual 1965 points

Part Number: BQ25570

I have a query regarding part BQ25570. We are evaluating this IC for an energy harvesting application.

Can we have single storage element(Capacitor or battery) connected to VBAT pins of multiple BQ25570s?

This is a combination of multiple harvesters and single storage element. Is this combination possible?

over 5 years ago

0 Ricardo over 5 years ago

TI__Genius 10385 points

Dilip,

Please give me a few days to receive an extra bq25570EVM, so I can verify this on the bench.

Thanks,

Ricardo

0 Dilip Namdeo Mohol over 5 years ago in reply to Ricardo

TI__Intellectual 1965 points

Ricardo,

Thanks for reply, Let us know once you are done with experiments.

Regards

Dilip

0 Ricardo over 5 years ago in reply to Dilip Namdeo Mohol

TI__Genius 10385 points

Dilip,

After verifying it myself on the bench and speaking to some colleagues who have seen this configuration before I believe this setup will work for your application.

I do not suggest the connecting the output of the buck converters (VOUT) together for a potential shared system load.

Thanks,

Ricardo

Power management

Power management forum

BQ25570: Multiple device with Single Storage element.