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Some questions about the wireless power supply IC BQ500211

Yang CAO
Prodigy 10 points
Other Parts Discussed in Thread: BQ500211, BQ500210, BQ51013

Hello

I’m using wireless power supply ICs to design wireless power supply test module and I have some questions about the IC BQ500211.

  1. In the typical application diagram of BQ500211, the application uses 2 digital PWM signal outputs from BQ500211, DPWM-1A & DPWM-1B, to control 2 MOSFET drives to generate PWM wave. And the PWM wave is from -5V to +5V in theory. While in the typical application of BQ500210, I find that only one of the two digital PWM signal outputs is used, and the PWM wave is from 0 to 19V. Also the pins of BQ500210 seem to have the same functions to BQ500211 by referring to the datasheets. I wonder whether I can use BQ500211 to replace BQ500210 in the typical application diagram of BQ500210 or only use one of the 2 digital PWM outputs of BQ500211, because I want to design a more compact transmitter but I didn’t have BQ500210 ICs.
  2. The TX coil recommended in the datasheet of BQ500211 are in A5&A11 standard, which have the inductance of 6.3uH. Can I use A1 standard TX coil by changing resonant capacitor? How the working voltage and current in the TX coil will change? In this situation, can the RX module using BQ51013 and A1 standard RX coil work normally? Notice that I don’t have to make products comply with QI standard.

Regards