Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

RE: Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

PORTS — Wed, 20 Aug 2025 14:54:41 GMT

I fully appreciate you sharing your project with us. Congratulations on your initiative and your dedication to the project. I have two original Electrolux boards that are defective, but I couldn't find the electronic diagram or identify the chipset on the boards. Do you have any guidance regarding the possible repair of the original board?

RE: Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

PhilippGrab — Wed, 14 May 2025 09:25:03 GMT

Awesome Project!

I would like to ask if got around to publishing the Lib for the BQ25798 yet? I am an Electronics Engineer, however Software developement is not my forte. I would be happy for just the "not clean" Lib, if you havent got the time yet. If got a few Projects lined up, where this Chip would be absolutely perfect. Cheers!

RE: Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

DAB — Sat, 24 Aug 2024 19:38:44 GMT

Ah, but the adventure was priceless.

Nice fix.

RE: Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

scottiebabe — Fri, 23 Aug 2024 13:03:31 GMT

Wonderful project & write up. There is a good chance the battery charger is a flipchip QFN (FC-QFN or Hotrod QFN)

https://www.ti.com/lit/an/slvaee1/slvaee1.pdf?ts=1724346665062

A low impedance thermal path is achieved through the pins as each pad on the die is soldered to the leadframe as opposed to wire bonded.

RE: Repairing a vacuum cleaner in the most complicated way (plus BQ25798 mini-review)

michaelkellett — Fri, 23 Aug 2024 09:20:36 GMT

Thanks for sharing this. It's nice to see a real project, warts and all.

I always tell customers to plan for at least one pcb iteration, it doesn't always happen but it often does.

I'm puzzled - your text refers to TI BQ25798 but the schematic shows BQ25792 ?

It is odd that it doesn't have any thermal pads - they can't cost much since they often appear on chips that don't need them.