Ezgi,
The TIDA-00318 receiver reference design uses the bq51003 for the wireless power receiver IC and the bq25100 as the charger. The receiver coil used is the TDK WR222230.
The TIDA-00334 transmitter reference design uses the bq500212A for the wireless…
Hello Akio Tanaka
The Transmitter coil will have a high circulating current flowing though it under light or no load condition. Current will only go up with load. DC resistance of the TX coil should be kept low to keep thermal rise low. Standard…
Evagoras,
The bq500212AEVM will work for the lower power levels you are dealing with. However, as noted earlier, the small coil size may be an issue. See the TIDA-00334 or TIDA000415 which will offer ideas on smaller TX coils that can be used. The schematics…
Other Parts Discussed in Thread: BQ500212A Hi I am kind of new to Qi powering.
I bought BQ500212AEVM and it has 6.3 uH coil (WE 760308111)
But I want to replace it with smaller coil with 6.5 uH (WE 760308101103)
Since TIDA-00334 used this coil with BQ500212A…
Other Parts Discussed in Thread: BQ51050B Hi Team,
I am looking for a wireless power transmitter for BQ51050B. Is TIDA-00334 compatible?
Are there any other ready-made chargers in the market?
Thanks!
Regards,
Frederic
Guillaume,
The inductance of the RX does not need to match that of the TX. Efficiency is best if they are the same physical size, but most applications do not have that. The RX coil is usually smaller in size than the TX coil.
Another consideration is…
Sasa,
I'm not sure of exactly you are asking. I will give some overview on coils.
A small RX coil (10mm diameter) is very difficult to couple to. A 15x20mm coil would still be difficult, but should be achievable.
If your system does not need…
Sukkyu,
1) Yes, an LED can be placed from BAT to ~CHG. See the bq51050B EVM User Guide for an example. Note that for low battery situations (2.5V for example) there may not be enough voltage to light the LED. Check the VF of the LED for your system. …
Please allow me one more question.
I see that in the BOM for the reference design of the wireless transmitter TIDA-00334, the Tx coil Wurth 760308101103 has been mentioned.
The question is which Rx inductive coils belong/fit to the given receiver reference…
Chandra,
The goal of this exercise was to determine if it was the RX coil that was limiting your supply. I think you did prove that.
I don't think a 3-coil TX will impact the results. The multi-coil approach energizes one coil at a time in an attempt…