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BQ500215: LED behavior seems more complicated than described in datasheet

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Part Number:BQ500215

Hi,Thanks for your time and patience.

I have several questions.

 

Q1

During charging our device (with BQ51025) in wireless charging dock (BQ500215), insert a metal object, and pull it out while red led fast blinking, in most cases, blinking will stop after a litter while, but sometimes it will go on blinking nonstop with normal charging  power 1.9A*3.782V.  The same issue also happens on BQ500215EVM accompanied with BQ510215EVM.

NOTE:

BQ500215 configuration:

1)      LED MODE resistor – 64.9K

2)      Red LED is controlled by pin LED_B

3)      Threshold resistor:

 

Q2

When insert device(same configuration as above) into charging cradle, sometimes red led blinks slowly nonstop with normal 10W operation.

 

Q3.

As to datasheet of BQ500215, what does "—" mean? It means LED won't blink? Or the LED behavior is unpredictable?


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