Other Parts Discussed in Thread: TIDA-00668, TIDA-00318, , BQ25100
The TIDA-00668 which I copied values from uses a 19m diameter coil while I will be restricted to a maximum size of 15mm, due to availability and cost I am considering the 12mm WR121210-27M8-ID which is 8.32uH. I intend to use a off the shelf transmitter such as the TYLT Vu Solo and then explore cheaper options from there. I don't fully understand how to pair or design this Rx stage but I do not need very much power transfer since the end goal is to recharge a little 17maH coin cell battery. For the BQ51003YFPT I followed multiple TI dev platforms (TIDA-00318 and TIDA-00668) which varied in capacitor values going from the coil to AC1, is this fine tuning that is dependent on the Rx coil?
Some examples include use of a battery management IC (such as BQ29702DSER) and others do not, is this strongly recommended when using these other TI components?
The BQ25100AYFPT connected to the output of the BQ51003 charges the 3V 17mAh coin cell, the highest recommended R_ISET value is 13.3k which sets the charge current to 10mA, is that low enough to safely charge such a small battery? is a slightly higher R_ISET value allowable with this part? Lastly, it is very unclear to me what to set the PRE-TERM resistor value to for this application, please advise.
I have a schematic of all of this but first I have to find out how to add an attachment to this post
Thank you very much