PLUS+1 User Forum
General Discussion => Off topic => Topic started by: spittet on November 25, 2017, 09:28:38 PM
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Hi,
What are you using for DC-DC power supply when you want to keep all your electronic devices alive even during a hard cold-start where battery voltage can drop down to 6V?
I was using these http://www.current-logic.com/shop/index.php?main_page=product_info&cPath=4&products_id=201 , but I recently discovered that they have a low input voltage protection and when input voltage goes slightly under 8V, the output voltage goes to 0V and everything that is powered by this power supply goes off.
I liked this unit because :
- wide input voltage
- encapsulated/sealed enclosure
- easy mounting
- large power (120W!)
Please share what are you using as power supply.
Have a good day!
Sam
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Sam,
I played around with using a small 12 volt lithium battery hooked to a charger running from the main battery bank. It worked well until guys forgot to turn off the master. We now have a 24 volt system and alternator and a 12v system battery and alternator just for the computer system and all the items we have swapped to 12 so we have no issues with engine drawing too much.
Mike
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I've used Axiomatic (http://www.axiomatic.com/power-supply/) and Phoenix Contact (https://www.phoenixcontact.com) DC-DC converters. They're nice, but like everything else off-the-shelf that I could find, will drop out or stop regulating below 6-9V once their internal energy storage is depleted.
Phoenix also make UPS modules, and even better, capacitor-based Buffer Modules (https://www.phoenixcontact.com/online/portal/ca?1dmy&urile=wcm%3apath%3a/caen/web/main/products/subcategory_pages/Buffer_module_P-22-07-04/4d020158-bd9c-4a95-830e-cd1c42651955). These are 24VDC, however. Maybe something similar exists out there in 12VDC-land.
Related threads:
http://www.plus1forum.danfoss.com/index.php?topic=912
http://www.plus1forum.danfoss.com/index.php?topic=945