From the comments on our earlier standalone Linear Li-Ion battery charger with thermal regulation in ThinSOT app note post, Jan writes:
Nice chip, indeed. Unfortunately not easy to find stocked – here I can get it only from Farnell (5 euro + VAT a pop) or Digikey ($3/pc + VAT + import duties).
I would rather use something like MCP73831 – costs about 50 cents, same sort of package, but only 500mA max charging current. Which isn’t too big deal in most cases – USB can only deliver 500mA max by default …
More details on ElectroSchematics.
A no-brainer to me, I agree completely with this. Search Farnell (which minimizes shipping costs for me versus say Digikey) for Li-ion charger ICs and Microchip parts looks great for the cost conscious and non-solder paste user.
Nice. I was looking for schematics on these.
That’s a really weird thing to say, because the data sheet should have more than enough for you to work on. For these kinds of parts (linear Li-ion chargers, 6-8 pins) their functionality is really quite simple, and as such, the circuit examples in the data sheet more than suffices.
Um. Okaaayyy…
Well, you have fun judging then. Ta!
well…..its good …….
i want to know that, how can we charge three 3.7v lithium ion batterys by using mpc73831 charge controller… anyone having circuit?
It’s a simple matter using MCP73831 if you are charging them separately, _however_, if you are trying to charge a 3-series pack (11V) then there is a need to handle charge balancing. IIRC Linear Technology has plenty of parts that charge multiple cells in series, their data sheets are often *very* useful and is good reading. The 3-parallel case is uncommon.