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LiPoly Charger - Single Cell 3.7-7V Input
sku: PRT-00726
Description: This is a Polymer Lithium Ion battery charger based on the MAX1555 IC. This charger uses either USB bus power (MAX1555 internally limits this to 100mA) or 2.1mm center positive wall-wart power (MAX1555 internally limits this to 300mA). Current is automatically reduced to a trickle when charging is complete. Cheap, easy to use, and flexible, this board serves as a great demo board for the MAX1555. This charger is a 'must have' for quick and clean charging of Lithium Polymer chemistry batteries.
Check out this iPhone Charger!
- Intelligent IC monitored charging - Constant current/Constant Voltage
- Do not use this charger to charge NiMH, NiCd, or any other battery type
- Comes fully assembled and tested
- Single Cell Charger
- Requires 3.7V to 7V(max!) Input
- MAX1555 will automatically choose the wall-wart charging if both USB and barrel jacks are connected to power
- Separate header for external power in
- Separate headers for battery and load system so batteries don't have to be removed for charging
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Great charger though.
3/5
I could just use the charge light to trigger a power down during charge, but would prefer to allow the device to operate (below the 300mA the charger will deliver) while the charge cycle is running.
Would like to know before letting out the magic smoke. :D
Anyway. I was wondering the same as Jody.
I need my device to go on a low-power state to protect its oLed and maintain its internal clock.
I guess I could add a simple transistor on the extra led sockets and simply signal the device to stay at low power state while the CHK pin on the MAX1555 keeps sinking current (charging).
Do you think the
Also, Sparkfun employees, update your docs so it shows the new board please. 8) I've had this board for almost a year and the docs show the old version of the board STILL.
Which is it? Am I missing something here?
My personal suggestion is that if you get this board, you also get some of the JST mating connectors at the same time. This chip will let the smoke out (with authority!) if you plug in your Lipo backwards. The extra header holes are a nice idea, but when adding your own connector, definitely make sure they are keyed.
Not that I would do something so foolish...
Andy
Andy
5.5v x 0.130A = 0.715W / 3.7v = 0.193 = 193mah
also is this ok to use on a Li-ion battery?
also has any one cut the bord in half(only he clips off) to make it smaller?
Also, unless the lipo cells have identical internal resistances, bad things would happen while charging and discharging them in parallel.
Does anyone know if I can add an additional LED indicator to show when the battery is charging? I'm using this in a box where you can't see the one mounted and I want to run something to the surface to light up when its plugged into AC or solar via the barrel jack.
Thanks
Dave
It's still a great charger!