Part Number: BQ500511A
Could you please explain more details about FOD_CAL, and ralationship between FOD_CAL and FOD_THR
Bill Johns, Applications Engineer
Texas Instruments Inc
In reply to Bill Johns:
In reply to xiaoyan Yun:
1.) I checked BQ500511A, there isn't PMOD function, so how does it deal with Parasitic Metal Object? -- Bill J-PMOD is only used on WPC 1.0 RX, they are obsolete and the support for them is not required.
2.) I'd like to know more further about when and how to tune FOD_CAL parameter ? and the relationship between FOD_CAl with FOD_THR as well.
Bill J -- FOD calibration will used the AVID FOD RX (see below link). This is a precision receiver with all losses accounted for. The loss calculated by the TX is read thru I2C bus using bqSTUDIO, with EV2400 see EVM User's Guide for bq50002A. The loss value is "Calculated Parasitic Loss", plot this value across 0mW to 5W of load, it should be flat. If it is not use FOD_CAL value to adjust.
Thanks for your explanation.
I suppose our HW is different with EVM, so I have to tune FOD_CAL parameter ( divided voltage resistor ) to get better performance for "load depandent loss"
Could you please let me know how to tune these 2 divided voltage resistor?
The resistor location on EMV is R22 and R26. EVM document name is "bq50002A Wireless Power TX EVM" Thank you!
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