BQ25601D: BQ25601D Excel Design Tool

Kami Huang60

Part Number: BQ25601D

Dear Sir/Ms.

Some Chargers will provide an Excel design tool. For example, to calculate NTC resistance. I can't find it on the TI website. Does BQ25601D have an Excel calculation tool that can be provided to customers?

Best Regards,

Kami Huang

over 4 years ago

+1 Ning T over 4 years ago

TI__Guru 57481 points

Kami,

For RT1 and RT2 calculation tool, please refer to http://www.ti.com/lit/zip/slurax7 and plug in the specified design information accordingly. Although it was developed for the BQ2589x, the principle is similar and can be used for BQ25601D with minor changes.

Thanks,

Ning.

0 Kami Huang60 over 4 years ago in reply to Ning T

Genius 3830 points

Hello Ning,

The customer wants to design Vth and Vtl, the calculation formula VREGN is to bring in 6V. But the customer actually took the BQ25601D evb to measure the VREGN voltage
① VBUS voltage is 5.0V~6.16V, VREGN voltage is VREG 4.99~6.159V,
② VBUS 6.17V~~6.35V, VREGN is fixed at 6.17V,
③ VBUS>6.35V VREGN has no output
So this VREGN output seems to be different from the datasheet.
I want to confirm it. Isn't Jumpber set?
How to design the voltage divider resistor next to the NTC?

Best Regards,

Kami Huang

0 Wyatt Keller over 4 years ago in reply to Kami Huang60

TI__Guru** 105630 points

Hello Kami,

The RT1 and RT2 values do not depend on VREGN since it is a percentage of VREGN used for the thermal thresholds. You should still see a voltage on VREGN when VBUS is over 6.35V. What is VREGN when VBUS is 9V? How much current are you drawing from VREGN?

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ25601D: BQ25601D Excel Design Tool