While piecing together my Carputer I found a need for a 5V power supply to power my USB hubs. It needed to turn on and off with my computer (not ignition), supply plenty of power, look good and be easy to install. I thought it might also be nice to have a 12V supply that switched on with the 5V supply.
Basically, I'm developing a
PV5 on steroids with a few extra features and an elegant chassis.
Here are some specs of my design:
Input range: ~8-25V
Topology: Voltage mode switching power supply (should be +80% efficient, haven’t tested yet)
Output Voltage 1: 5V +/- 2%,
Output current 1: 0-10A (stable with no load, and quick transient response)
Output voltage 2: Unregulated 12v
Output current 2: 0-5A
Other key features:
Switched 12V output @5A (input 12V supply routed out when supply is ON)
Power supply can be enabled by USB cable or 12V accessory
Easily accessible 15A ATC Fuse (standard automotive blade fuse)
~5" x 3.5" x 1.25"
Extruded aluminum chassis, painted black
5V power good LED
Fault indicator LED
USB-B connector for computer sync. (no dangling cable if not using USB)
Screw terminals for power connections (12sw, 12Vin, 12Vin, 12Ven, GND, GND, 5Vo, 5Vo, 5Vo)
Mounting tabs
Electricly floating chassis
Below is a picture of the chassis I'll be using. This is a picture of a different project but this one will look very similar. That gift card is credit card size, to give some size perspective.
Also you can see the cad of the PCB. if you only had a parts list you might be able to make your own
.
Anyone interested in buying one of these?
Do you have a comment on how it could be improved?
Are you interested and waiting for it to be built and tested?
Would you like to see a kit?
Please, any comments of feedback would be greatly appreciated.
I'm planning a small production run for starters. The cost should be $90, plus shipping. Lead time is about 4weeks from now. I finished the design today and begin ordering shortly.
You can PM me, email, or ask questions in this thread.
carpower_at_jopeldesigns.com
Thanks, Jesse