uSupply - alternate design

[BCard]

I needed a battery powered supply that used stuff I had available i.e. low-cost 8x2 character LCD, ADC, and DACs.
The attached design follows Dave's with some changes.
I have prototypes, but so far have operated them in manual mode i.e. using Pots.

Attached is the design.
Reviews and comments are welcome!

[001]

looks good
and what is "original uSupply"? 

[wilfred]

looks good
and what is "original uSupply"? 

You have to go back to EEVBlog #221 for the story of the original PSU design. It was quite a saga. There is work going on on a new generation version. EEVBlog #1055 is related to the new version.

[001]

did You mean videos?
Can I read/see schematics anywere else?

[BCard]

Dave's original project is at:
https://www.eevblog.com/projects/usupply/

My version uses a modified voltage and current monitoring method.
Also, the battery holder is mounted to the rear of the PCB for convenience.

The board+ battery holder is designed for BUD Industries plastic enclosure CU-1874-B

[Kleinstein]

Daves original µSupply circuit does not work well in current regulation mode. This is a common problem with circuits that try to add an adjustable current limit to a voltage regulator chip. So likely there is no good easy fix to this. It would be more like a completely different design, avoiding a regulator chip like LT308x.

[BCard]

Agreed.
This version relies on firmware to provide programmable current limiting.
I have no data yet as to the reliability of this approach, but the LT3080's built-in current limit will kick in to prevent smoke.

[Howardlong]

Very nice!

For true travel use, the cherry on top would be an option for USB charging, looks to me like you have plenty of space left on the board to implement that 

[BCard]

I'll investigate if the charger circuit will work off 5V from the USB and post a reply.