HI,
I am looking for a charging circuit board for a battery backup.
Currently we are using a part called CPS1 from Alaram saf, and they are no longer in business. I have attached the spec sheet of the part. Can you please suggest a similar type of board(any manufacturer) with the specifications as attached.
Thank you
52-192.pdf (405.8 KB)
Hi PrasannaG,
Welcome to the TechForum.
I have not found any chargers which have all of the same characteristics as the CPS1. In particular, I don’t think we carry any which take 12Vac to 24Vac as input voltage. If you could use one which takes either a DC input or a 110 to 120Vac input, then we may be able to find something.
Also, I assume this is for a lead-acid type battery, based on what I read. Do you need one capable of charging all three voltages listed – 6V, 12V, and 24V as yours does?
Hello David,
We need a power supply / battery charger unit. The power supply puts out 12 volts at 1 amp and charges a 12 volt battery. When the power supply loses input power, the battery connection gives power to the device.
Can you look for a part that supports the above requiremment.
Prasanna
Hello PrasannaG,
We have an power supply, with 90~264VAC input, and will output 12VDC @ 1A, which is part number 1951-1248-ND.
If it loses the AC input, it can be powered by 130~375VDC, but I do not see one that would automatically power itself with the battery attached to the output, to charge the same battery that is powering it.
Hi PrasannaG,
These devices will charge a 12V lead-acid battery at somewhere between 0.8A and 2.09A.
Input voltage requirements will depend on the specific product, but none will take the same 12Vac to 24Vac as your original product, so you would have to account for that.
If you are looking for a single device to both charge a battery and provide 12V of power to another device when the supply power is cut, perhaps you might be interested in the BC36ML, which has its own internal batteries and performs the function of powering a 12V load at a maximum of 3A, even when its input power is interrupted. It takes an input voltage from 100Vac to 240Vac.
Hello David,
Good afternoon
Power supply that outputs 12 VDC with leads to connect to a 12 volt battery, the input should be 16.5 VAC
Please help.
Thank you
Hi PrasannaG,
As I stated above, we do not have any lead-acid battery chargers which directly take anywhere near 16.5Vac inputs. However, it is very simple to convert AC to DC voltage with a bridge rectifier and a capacitor, using, for example, the following:
With those two parts, one could use the following:
Use the bridge rectifier and the capacitor to form the following input circuit:
You may need to give more accurate specification about the battery. As @David_1528 speculated above, you probably are using a lead acid battery. For that battery you will need 14.4V output voltage, not 12V. Will your load be able to handle 14.4V or should it be exactly 12V? With 12V your battery won’t be fully charged.
There is also the reverse leakage issue that you will need to consider. When the 12V supply is off, ideally no current should leak via output to the regulator. You ought to specify what is the maximum current allowed for leakage.
You could take a look at automotive spare parts as well for a solution.
Cheers, heke
