Is Automobile Power Viable for Electronics Projects?
Posted: Fri Dec 09, 2016 11:49 pm
I have some project ideas that would be targetted for use in a vehicle. I would like to consider the possibility of tapping into the car's 12V battery to power the projects, for example through the cigarette lighter port. I would put the input power from that port through a linear or switching regulator (e.g. a 7805 or similar), to give me 5V power. Am I likely to face any challenges in that approach? Are there front-end circuits that are a 'must have' for consuming automotive battery power in low voltage / low current embedded applications? Specific circuits and/or part recommendations are encouraged.
Then I found some protection against automotive power supply hazards.
I'm looking for a way to protect a small circuit which is to be used inside of a car or truck (12V or 24V power system). The circuit consumes about 12-15W. I use an isolated DC/DC converter module which can regulate 9-36V down to 3.3V.
I'm looking for recommended circuits or a controller IC that can take care of the usual hazards:
Load Dump Spikes
Reverse Voltage
OV/UV Protection
General noise on the power lines.
... Anything I might have missed.
Currently I have my eye on the LTC4365 http://cds.linear.com/docs/en/datasheet/4365fa.pdf from Linear Technologies. I've thought about using it together with a bi-directional TVS, clamping the voltage to 32V and protecting everything with a fast blowing fuse.
Would this be a proper solution or did I miss something here?
Then I found some protection against automotive power supply hazards.
I'm looking for a way to protect a small circuit which is to be used inside of a car or truck (12V or 24V power system). The circuit consumes about 12-15W. I use an isolated DC/DC converter module which can regulate 9-36V down to 3.3V.
I'm looking for recommended circuits or a controller IC that can take care of the usual hazards:
Load Dump Spikes
Reverse Voltage
OV/UV Protection
General noise on the power lines.
... Anything I might have missed.
Currently I have my eye on the LTC4365 http://cds.linear.com/docs/en/datasheet/4365fa.pdf from Linear Technologies. I've thought about using it together with a bi-directional TVS, clamping the voltage to 32V and protecting everything with a fast blowing fuse.
Would this be a proper solution or did I miss something here?