Hello,
I’ve implemented the tidrih5 (5W Wireless Transmitter) schematic and built the first prototype. Right now, when I place my Samsung Galaxy S6 over the transmitter, I get a slow blinking green LED for a few seconds meaning “Power Transfer”, then I get a fast blinking red LED meaning “FOD Warning”. This flashes for several seconds then all LEDs go off. This cycle repeats over and over.
Question #1. Since my Samsung Galaxy S6 is Qi compliant it should work with the BQ500511/BQ50002 combo. Right? (It works fine with off -the-shelf Qi chargers).
To try and get past the FOD Warning, I removed R15 (on the tidrh5 schematic), making FOD_THR = 3v and thereby disabled. No change.
Question #2. How is it that I can get a flashing “FOD Warning” with the FOD disabled?
I also removed R26, the ILIM pull down because I saw on the BQ500511 data sheet that this pin (pin 4) is labeled “Reserved” and says to leave this pin open. This made no change. Still stuck in same cycle with FOD warning. I then pulled this pin up to 3v because I saw in the tidrjv8.pdf schematic that it was pulled up. No change.
Question #3. What should I do with pin 4 on the BQ500511?
I can see activity on all signals between the two ICs except MODE. MODE is always low.
Question #4. Should MODE always be low?
Thanks in advance for your help!
Mark