Just realized I probably should have posted this in here, so I apologize for the double post...
So, I have a situation. I have a new prototype system that uses a 13.2 Volt NiMh battery pack, and I need to figure out a quick and dirty charging system for temporary use (we are developing a more universal buck/boost charging board for the product in the near future). For now, we just need to charge the system up during a demonstration and evaluation phase, where it will typically be allowed an overnight charge between uses.
We have a readily available standard 18V unregulated DC power supply being used for the previous generation of this product, and would like to use that supply if possible. That power supply is rated at 18V 533mA, and shows about 24.2V output measured with no load.
Any suggestions on a good quick and dirty charging circuit? I've been looking at so many variations (LM317 based, some specific charging chip based, etc) that I'm going crazy, and I think I may be overlooking the best and most obvious choices.
Appreciate any help on this... Might save me from a nervous breakdown!
So, I have a situation. I have a new prototype system that uses a 13.2 Volt NiMh battery pack, and I need to figure out a quick and dirty charging system for temporary use (we are developing a more universal buck/boost charging board for the product in the near future). For now, we just need to charge the system up during a demonstration and evaluation phase, where it will typically be allowed an overnight charge between uses.
We have a readily available standard 18V unregulated DC power supply being used for the previous generation of this product, and would like to use that supply if possible. That power supply is rated at 18V 533mA, and shows about 24.2V output measured with no load.
Any suggestions on a good quick and dirty charging circuit? I've been looking at so many variations (LM317 based, some specific charging chip based, etc) that I'm going crazy, and I think I may be overlooking the best and most obvious choices.
Appreciate any help on this... Might save me from a nervous breakdown!