------Question for LP906090JH PCM 2 WIRES 70MM Please Put your question below------
Can you recommend a battery charger for this Jauch LiPo battery, 3.7v, 6Ah
Hi Ted2020,
I think we need a little more context first. What’s the application?
What type of charger are you looking for? Are you looking for a stand-alone charger, some sort of charging board to be integrated into a product, or an IC around which you would design a charging circuit?
If an integrated application, does it need to be able to both charge the battery and provide power to the product for which the battery is used?
Hi David,
The battery will be used in an instrument, and will be removed from the instrument case to be charged. So, I’m looking for a 120 V AC wall charger of some kind. I posted this question to Jauch directly and they declined to make any recommendations.
Ted
Hi Ted,
OK, stand-alone charger.
One to consider is the GTM91128LI1C1000T00. It’s perhaps a little low for charge current, at 1.0A rather than the suggested 1.2A, but if you can tolerate slightly longer charge time, it seems to be a reasonable possibility.
Since the LP906090JH PCM 2 WIRES 70MM battery has built-in PCM (Protection Circuit Module), the charger does not need to have the temperature sensing that would otherwise be necessary.
The GTM91128LI1C1000T00 has the basic charging functions of pre-charge, bulk charge (constant current of 1.0A), and full charge voltage of 4.2V, which seems to match the battery in question.
You would want to carefully read the documentation for both the battery and the charger to verify compatibility, but it seems to be worth considering.
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Hi David,
Thanks for the info, charger sounds good. GlobTek also has a 2A version, is that too high or just the potential capacity?
GTM91128LI1C2000T00
Ted
I see that the 2A version is for 3 cells, so not good for this battery
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If this is a for a one-off project, you might also consider something from this category. For example, the DFR0446. They are a combination of evaluation boards and hobbyist-type boards designed for battery charging. You’ll have more options for output current among these.
Note that the datasheet for the LP906090JH specifies a maximum charge current of 3A, so keep that in mind.
All of these are powered by some sort of DC input, either USB or other type, and would therefore require a separate pretty standard AC-DC supply with either a USB or other type of DC output.
Again, these should not be used for production products, but may be sufficient for a one-off application.
Hi David,
Thanks for your help, these are good options. I noticed there are three variants of the TM91128 charger I’m interested in, what are the differences?
I’ve spread out the PN to make it easier to see the differences. All are GlobTek, a couple dollars difference in price.
GTM91128 LI 1C 1000T00
LI, 1 cell, 1 A, recommended by you
GTM91128 LI 1C 2000T00
Li, 1 cell, 2 A, but description says 3 cells, but still 4.2 v, which is correct?
GTM91128 LI 1C 1000XFX9
Li, 1 cell, 1 A, picture looks like desktop only, not wall mount, but description says wall mount also, which is correct?
So, what are the differences between these. I would probably prefer the 2 A version to charge the 6Ah battery in 3-4 hr.
Ted
Hi Ted2020,
Good catch on the GTM91128LI1C2000T00. It is indeed a 4.2V single cell charger. I missed it because of the error in our data. I’ll get that corrected.
Looking at page 2 of the datasheet, it’s output is actually 1.6A, so not a full 2A, but better than the other 1A options. It includes 3 different barrel plug connectors for the output (5.5x2.5, 5.5x2.1, 3.5x1.3mm plugs) so you’ll have options on what mating connector you choose to use.
The other two are 1A output variants, with the GTM91128LI1C1000T00 coming with the same output connectors as the GTM91128LI1C2000T00 and the GTM91128LI1C1000XFX9 having a different type.
This product series is designed with interchangeable inserts to accommodate either an IEC 60320/C8 cord assembly or one of several regional plugs described on or about p11 of the datasheet.
Datasheet on or about p7 indicates that the desktop insert is installed.
Please note that the manufacturers’ product specifications are to be considered authoritative in all cases. Descriptions and parametric data appearing on the DigiKey website are aggregated from a great many sources, via processes which unfortunately are subject to error.