Electronics > Projects, Designs, and Technical Stuff
Batteroo testing
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FrankBuss:

--- Quote from: EEVblog on December 23, 2016, 10:03:55 am ---And there goes the ball game.
Typical passive device and typical active device FAIL :-DD

--- End quote ---

Right, not much left of what they claimed.

Another useful test would be testing the current limiter. I found this diagram: An AAA battery can provide 12 A peak short circuit current, and 2 A with no problem for several minutes. Another claim for their product was that it helps providing stable voltage for devices with current spikes. If this doesn't work, it would be the final nail in the coffin for the Batteroo sleeve.
Jay_Diddy_B:

--- Quote from: amspire on December 23, 2016, 12:34:16 pm ---The IC is not a long way off the Linear Technology LTC3539/LTC3539-2

http://cds.linear.com/docs/en/datasheet/35392fc.pdf

snip ....

--- End quote ---

In January 2016 I built a 'fake' batteroo using the LTC3539. There are pictures here:

Link: https://www.eevblog.com/forum/blog/eevblog-751-how-to-debunk-a-product-(the-batteriser)/msg849800/#msg849800





I believe that this is a custom ic.
I would like to see it de-caped and photographed.

I used some expensive parts, the inductor I used was from Wurth MAPI series.

I think the Batteroo inductor is something like CKP20162R2M-T from Taiyo Yuden This has about 140m \$\Omega\$ of DCR.

Link: http://www.digikey.ca/product-detail/en/taiyo-yuden/CKP20162R2M-T/587-2606-2-ND/2349935






@FrankBuss

Great work !! I appreciate your efforts.

Regards,

Jay_Diddy_B

amspire:
 I agree that it looks like a custom IC, but probably to the extent of simple changes. Such as hardwiring shutdown to always on, pwm/boost mode to boost, internal feedback divider to a fixed 1.5v, and possibly lowered the current in sleep mode at the expense of increasing the low current waveform to 200mV pp.

The inductor is more likely to be something like a 2.2A Murata.
mikeselectricstuff:
I'd be surprised if it was custom, considering that it's hardly a new requirement.
My guess is it's something from an obscure Chinese company. 
amspire:

--- Quote from: mikeselectricstuff on December 23, 2016, 08:49:06 pm ---I'd be surprised if it was custom, considering that it's hardly a new requirement.
My guess is it's something from an obscure Chinese company.

--- End quote ---
By custom, I did not necessarily mean a new die fabricated. Many of the Asian converters are made with preset output voltages, and perhaps that is something they can preset  with lasers on the die. The other changes may involve wire bonding changes and perhaps the choice of package. It did seem to take them ages to get hold of the final converter ICs, so I don't think it was an existing part.

The slow delivery is another issue, and my suspicion there is they are doing the potting by hand in the US for the initial devices.
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