Datasheet
The current is set by 1000/RPROG Amps, where RPROG is the resistance. So for 2
Kohms, that would make it 1000/2000 = 0.5 A = 500 mA. If you want 1A, you would use a
1K ohm resistor. If you want to increase the current, you need to decrease the resistance,
so you can just solder over the existing 2K. So for example, soldering another 2K resistor
into RPROG will give you 1K total resistance and 1000 mA current draw. See above for a
2.2K resistor soldered for about 950mA of max current draw. If you want to set the max
current draw lower, you'll need to remove the 2K resistor.
Adding External LEDs
If you are placing the charger in a box, you may want to have external LEDs for indicating
charge state. This is easy! Simply use any 3mm, 5mm or 10mm LEDs you wish and 1K
resistors and wire them like so:
© Adafruit Industries https://learn.adafruit.com/usb-dc-and-solar-lipoly-charger Page 31 of 40










