Hi,
We have made a Power transmitter based on bq500210. We are not (yet) using the MSP430G2001 and therefore the LEDs are directly connected to the bq500210. Our power transmitter works very well (tested with bq51013EVM), it has a good detection of the receiver, good efficiency...
The Parasitic Metal Object Detection (PMOD) is setup with a 100K resistor (Threshold of 1200mW) and is able to detect when a small metal object is placed between the transmitter and receiver (the Red LED blinks quickly). If we do not remove the object, after 20 seconds (warning time) the power transfer is stopped (as expected) but instead of being halt for 5 minute (as per what is explained in the datasheet), the power transfer restart again 1~2 seconds later with the green LED blinking for few seconds and Red LED blinking again for 20 seconds. This cycle repeats again and again.
Therefore, the warning (Red LED) is working properly, however as the power transfer restart again, the power is actually never stopped and fail to protect small metal object from overheating.
Is the 5 minutes halting state a feature of bq500210 or is it related to the MSP430G2001 ? Any idea how to solve this issue ?
Thanks for your help,
Fred.