[chbot] More Li-Ion charger info

[Mark Beckett]

Mark
Are you sure its actually a charger, and not something to provide 5v to 
a USB device from another battery or 5v source?

    *Application:*

    1.      You can DIY your mobile battery box for various equipment

    2.      Add USB connector for 5V output ie. Mobile, MP3 and MP4 etc.

    3.      Simple battery box for LED light, ie. Bicycle generator


The schematic here shows the TP4057 used to charge a battery, as 
intended. (although its the other package)
http://www.tpmicro.com/goods.php?id=48

There is a 12 page pdf here
http://www.ecranic.com/files/TP4057.pdf
(Bad luck Volker its in Japanese, but Google translate at least does 
some of it.)

I suspect they are using the DW01 simply to limit the battery current 
(and shut off at low voltage?).

The application of the BL8530 which is a booster, tends to reinforce 
this, since a charger only wouldn't need it.


Mark




Mark Atherton wrote:
> Glad this thread is progressing.
>
> Here is progress on the boards that came from eBay - 
> <http://www.idesignz.org/liion/liion_chg0.jpg>http://www.idesignz.org/liion/liion_chg0.jpg 
> and http://www.idesignz.org/liion/liion_chg1.jpg
>
> The protection FETs have driven me nuts, the 8205S is also available 
> in a 'reverse' package', which of course I had a data sheet for 
> initially - so nothing made sense. I ended up putting the SOT23-6 on a 
> board and measuring type - and it appears to be the correct type.
>
> Still strange things through - 5k resistor between P+ and B+, 1k 
> resistor and 100n cap swapped, wrong output inductor.
>
> Hoping the output under-voltage failure was caused by replacing the 
> battery with a PSU to do the measurement. A cell needs to be 
> sacrificed (if necessary) to see if it really works.
>
> Possible to drop charge current to 100mA by replacing 1k6 with 10k in 
> the charger.
>
> Possible to remove continuous 650uA battery leakage by putting a 
> switch in series with it (!).
>
> -Mark
>
>
> At 03:16 p.m. 20/05/2013, you wrote:
>> On Mon 20 May 2013 13:52:38 NZST +1200, Andrew Errington wrote:
>>
>> > It's basically a TP4056 on a board.
>>
>> As stated by others, the board would have the performance of the chip,
>> which has a
>> http://www.tpmicro.com/datasheet/TP4056Ver1.0_preview.pdf
>>
>> 1-page datasheet in sometimes bad English which is so cr*ppy, it doesn't
>> even say the chip's input voltage range, and the manufacturer doesn't
>> link to it, you have to use a search to find it.
>> The chip is N/A digikey, mouser, element14!
>>
>> The board is cheap though US$2.30, or 1.80 for 3 or 1.60 for 10.
>>
>> It's the fast option, but if I was doing something myself I'd probably
>> use the Microchip part (MCP73831, MCP73811) because it has better specs,
>> or the more expensive MAX1551 (would have to read up on the fine details
>> to tell what the differences are).
>>
>> Volker
>>
>> -- 
>> Volker Kuhlmann
>> http://volker.dnsalias.net/     Please do not CC list postings to me.
>>
>> _______________________________________________
>> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>> http://lists.ourshack.com/mailman/listinfo/chchrobotics
>> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>> Web site: http://kiwibots.org
>> Meetings 3rd Monday each month at Tait Radio Communications, 175 
>> Roydvale Ave, 6.30pm
>>
>> When replying, please edit your Subject line to reflect new content.
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
> http://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Web site: http://kiwibots.org
> Meetings 3rd Monday each month at Tait Radio Communications, 175 
> Roydvale Ave, 6.30pm
>
> When replying, please edit your Subject line to reflect new content.
>