bluehash 1,581 Posted April 18, 2013 Author Share Posted April 18, 2013 on a side note, you can generate 5v from the 3.6V VCCpin the booster pack pinout provides if you use a buck-boost regulator, I did this on my USB + SD card board to give me 5V for my LEDs on the board(change made after I posted about it) that will let you feed that up regulated 5v into the charging chip and run it solely off the booster pack pins rather than having to charge it through the separate usb plug. here is the schematic screenshot of how to rig it you can power VREG Enable from VCC for always on 5V output, or tie the enable to an output on the MSP430 and turn the 5V on and off as needed. the resistor values set the voltage out, these will give you 5V for the NCP1406 the inductor can be from 1uH to 47uH, larger gives you better performance, smaller allows smaller components, just make sure the saturation current is atleast what you expect to draw from the 5V output plus some cushion Good idea! I have to keep track of cost... since this will add to it.. but it will get rid of the USB connector. Quote Link to post Share on other sites
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