Hello all,
I'm starting work on a 12V power supply that I've been assigned as part of a summer research project. These are the specifications I've been given:
-Needs to take a ~12V (11V-14V) input from a car battery.
-Needs to charge a lead acid battery and then a lithium ion battery from the 12V input.
-The power sources have the following order of preference:
1. 12V input
2. Lead acid battery
3. Lithium ion battery
-Power output needs to be rock-solid. It is very likely that the 12V input is going to disappear suddenly. This power supply will be used in car crash reenactments to power sensors.
-Current and voltage needs to be monitored. I have an Arduino design that I plan on just dropping onto the PCB. I don't have anything to sense this.
-Current and voltage need to be displayed.
-Anything that can stabilize power output needs to be added on. Safety features (thermsistors, etc) need to be included.
-The PCB needs to fit within a 180x120x80 mm case.
-All power sources need to have switches on them.
I'm using Altium Designer. It's my third PCB project ever and I'm still new to this. I'm a computer science/electrical engineering double major. I'm much better at the CS side than the EE side - right now. So I have a lot of silly questions and not a lot of experience with hands on applied stuff. I.E. I'd never heard of a "buck boost converter" until I started on this.
Right now I'm looking at an LTC 4000-1 https://cds.linear.com/docs/en/datasheet/40001fa.pdf as my controller. On page 34 it starts showing typical applications. I've also looked at the LTC 4000, which has a few more circuits available, http://www.linear.com/solutions/LTC4000?type=circuit .
I've also looked around on Linear's site as I wrote this post and found things like http://www.linear.com/product/LTC4417 and https://cds.linear.com/docs/en/datasheet/4020fb.pdf that look promising, but I've not seen any that look like they could handle multiple batteries simultaneously, so it's looking like I'm going to have to have multiple ICs.
I've Googled around a bit for other designs to look at and what I've seen has not seemed robust enough for what I'm doing.
I'm new to this. I need guidance through this project, so I figure this thread's going to be sort of a chronicle of me figuring out how to do this, hopefully with assistance from you all.
My first questions are: What chips would you suggest I look at? What keywords should I go and learn? What advice do I need to hear that I'm not asking for because I don't know?
Thanks!
I'm starting work on a 12V power supply that I've been assigned as part of a summer research project. These are the specifications I've been given:
-Needs to take a ~12V (11V-14V) input from a car battery.
-Needs to charge a lead acid battery and then a lithium ion battery from the 12V input.
-The power sources have the following order of preference:
1. 12V input
2. Lead acid battery
3. Lithium ion battery
-Power output needs to be rock-solid. It is very likely that the 12V input is going to disappear suddenly. This power supply will be used in car crash reenactments to power sensors.
-Current and voltage needs to be monitored. I have an Arduino design that I plan on just dropping onto the PCB. I don't have anything to sense this.
-Current and voltage need to be displayed.
-Anything that can stabilize power output needs to be added on. Safety features (thermsistors, etc) need to be included.
-The PCB needs to fit within a 180x120x80 mm case.
-All power sources need to have switches on them.
I'm using Altium Designer. It's my third PCB project ever and I'm still new to this. I'm a computer science/electrical engineering double major. I'm much better at the CS side than the EE side - right now. So I have a lot of silly questions and not a lot of experience with hands on applied stuff. I.E. I'd never heard of a "buck boost converter" until I started on this.
Right now I'm looking at an LTC 4000-1 https://cds.linear.com/docs/en/datasheet/40001fa.pdf as my controller. On page 34 it starts showing typical applications. I've also looked at the LTC 4000, which has a few more circuits available, http://www.linear.com/solutions/LTC4000?type=circuit .
I've also looked around on Linear's site as I wrote this post and found things like http://www.linear.com/product/LTC4417 and https://cds.linear.com/docs/en/datasheet/4020fb.pdf that look promising, but I've not seen any that look like they could handle multiple batteries simultaneously, so it's looking like I'm going to have to have multiple ICs.
I've Googled around a bit for other designs to look at and what I've seen has not seemed robust enough for what I'm doing.
I'm new to this. I need guidance through this project, so I figure this thread's going to be sort of a chronicle of me figuring out how to do this, hopefully with assistance from you all.
My first questions are: What chips would you suggest I look at? What keywords should I go and learn? What advice do I need to hear that I'm not asking for because I don't know?
Thanks!