BQ25750: efficiency data

Toshiro Imi

Part Number: BQ25750

Tool/software:

Hello,

Our customer wants to see BQ25750 efficiency data at L=6.8uH, Vin=20V, VBUS=24V condition as his design reference.

Could you please share this efficiency data if you have.

Best regards,

0 Ethan Galloway 11 months ago

Hello Toshiro,

Thanks for being patient with this. I'll get this information to you tomorrow.

Best Regards,
Ethan Galloway

0 Ethan Galloway 11 months ago in reply to Ethan Galloway

Hello Toshiro,

Normally, we don't have this type of efficiency data available, but by coincidence, we have test data on these conditions.

This was tested with SiR188LDP switching FETs and a CMLB135T-6R8MS inductor. The FSW was 350kHz. The gate drive supply is provided by REGN.

Here's a zoomed in version of the same image that cuts out the data at lower currents.

The efficiency can further be improved by using an external gate drive of either 5V or 7V.

Let me know if this answers your question.

Best Regards,
Ethan Galloway

0 Toshiro Imi 11 months ago in reply to Ethan Galloway

Hello, Ethan

Thank you very much for presenting the efficiency data. This is helpful. May I understand this is 20V input voltage.

Best regards,

0 Ethan Galloway 11 months ago in reply to Toshiro Imi

Hello Toshiro,

Thanks for noticing that. I should have specified that in the graph.

Yes, this is with a 20V input voltage.

Let me know if there are any more questions.

Best Regards,
Ethan Galloway

0 Toshiro Imi 11 months ago in reply to Ethan Galloway

Hello, Ethan,

Thank you very much for your help. This is helpful to our customer to develop his design by referencing this efficiecny data.

Best regards,

Power management forum