On Tue, 27 Nov 2018 at 19:29, Neil <picdude3@narwani.org> wrote:

>
> I'm using an MCP73833-AMI for charging a 1-cell Lipo in a project. This
> specific charger is looking for a charge voltage of 4.2V, but the
> voltage never gets to over about 4.09V to 4.13V (tested over several
> batteries).
>
>
Datasheet:  http://ww1.microchip.com/downloads/en/DeviceDoc/22005b.pdf

uChip evaluation kit manual:
http://ww1.microchip.com/downloads/en/DeviceDoc/51626a.pdf

uChip Reference Design:
http://ww1.microchip.com/downloads/en/DeviceDoc/51746a.pdf

What thermistor (or what else) is on THERM pin?  [data sheet / spec]
(Lack of thermistor MAY alter voltage substantially).

What value of Rprog?
What charge current.
What cell used (datasheet/type/...?)

What package?
Is exposed thermal pad connected to Vss?

____________________

Related

uChip Portable Power Conversion Design Guide

       http://ww1.microchip.com/downloads/en/DeviceDoc/30009610F.pdf

Cousin - 73831/2

            http://ww1.microchip.com/downloads/en/DeviceDoc/20001984g.pdf




      Russell
--=20
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