Li+ion battery charger circuit

I am looking for a schematic design (EAGLE format) and working prototype for charging Lithium Ion/Lithium Poly batteries. The batteries are single cell [url removed, login to view] batteries [url removed, login to view] fully charged.

Safety protection IS A MUST in the design.

Must comply with the following:

-rohs compliant

-Vin 5 to 24 DC;

-three-stage LED indicators (power present/fault; charging; ready)

Please provide a BOM and estimated cost for components.

The original charger that is provided with these batteries shows the following specs:
output: 4.2V (dc) 0.1A

Switching ability to allow USB input would be an asset.

Taidot: elektroniikka, tekniikka

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Tietoa työnantajasta:
( 0 arvostelua ) Airdrie, Canada

Projektin tunnus: #408892

13 freelancers are bidding on average $165 for this job


Hi, I would like to know the Ah rating for the batteries. and how many are going to charge at a time. We can finish the schematic(& PCB design if required) for this requirement. We can prepare the BOM according Lisää

200 $ USD 20 päivässä
(5 arvostelua)

Hi, Please check your PMB for the details...

200 $ USD 5 päivässä
(8 arvostelua)
200 $ USD 3 päivässä
(4 arvostelua)

Bidder Comments : Dear Sir, Kindly refer to your PM for more details. Thanks & Regards, SANDS Team.

200 $ USD 3 päivässä
(3 arvostelua)

I've it. Tested and working in mass production without any problem. Charges Nokia BL-4C 3.7V batteries at the field for our own commercial devices. It's an industrial device powered with common Nokia BL-4C battery. - Lisää

40 $ USD 5 päivässä
(3 arvostelua)

please contact me if u r interested

150 $ USD 14 päivässä
(3 arvostelua)

I think I can do it. I'll need to know the cell capacity (A.H). I also find that 5v input voltage is a little bit short for current regulation. is it possible to define rather a 9-24 range or shall I also include Lisää

250 $ USD 20 päivässä
(0 arvostelua)

I am interested.

200 $ USD 15 päivässä
(0 arvostelua)

hello sir, i am very interested in doing this project. i hav worked already a bit worked with power supplies. chek the pm thanx for entertaining me

30 $ USD 2 päivässä
(0 arvostelua)

Please check your PM for details

250 $ USD 15 päivässä
(0 arvostelua)

Hi, I am planning to do this project using a custom chip for Li ion batteries. It shall be having 2 LED output which will display the state of chargings. Max output is for 1.2 amps. It will also monitor the cell tempar Lisää

100 $ USD 14 päivässä
(0 arvostelua)

hello sir please S pm

120 $ USD 7 päivässä
(0 arvostelua)

i can do it ,i have done the similiar project ,use the scientific method of the batteries [url removed, login to view] the different stage in charging(trickle charge ,constant-current charging,constant-voltage charging),of course th Lisää

200 $ USD 5 päivässä
(0 arvostelua)