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New Development based on bq500211A/bq500410A

Tapan Mittal
Prodigy 40 points
Other Parts Discussed in Thread: BQ500410A

We are hoping to develop a wireless charger around your chips. Our system needs to be WPC 1.1 compliant.

A) Power Transmitter Solution:

Our preference is 5V input operation (for USB compatibility). While our first product is a single coil guided positioning system, and the 500211A suits us well in that regard, we prefer 500410A to streamline further development when we build free positioning systems. Please clarify the following:

1. Is 5V input possible with 410A? Your EVM does provide for it with a boost regulator module, but are there any issues in this approach (apart from impacting the BOM and form factor)?

2. Is there a  ready (tested) solution for a single coil transmitter system based on the 410A, with 5V input?

B) Communications:

As I understand, the chips come with TI firmware which we cannot (or should not) change. How can we achieve sending (receiving) proprietary packets to (from) the receiver module? Do your EVMs for 211A and 410A provide this functionality?

Thanks,

Tapan.

  • 0
    TI__Guru 65846 points

    Q1) Is 5V input possible with 410A?

    A1.) No, the bq500410A power stage is designed for 12V.  The WPC standard TX type is A6.

    Q2.) Your EVM does provide for it with a boost regulator module, but are there any issues in this approach (apart from impacting the BOM and form factor)?

    A2.) This will depend on your design requirements.  But from a bq500410A and WPC certification standpoint if should not be a problem.

    Q3.) Is there a ready (tested) solution for a single coil transmitter system based on the 410A, with 5V input?

    A3.) The single coil application circuit is in the bq500410A data sheet, the 5V to 12V boost converter is in the EVM user’s guide. But we do not have a design that combines both.

    Q4.) How can we achieve sending (receiving) proprietary packets to (from) the receiver module? Do your EVMs for 211A and 410A provide this functionality?

    A4.) The bq500XXX devices do not support proprietary packets.

  • 0 in reply to Bill Johns
    Prodigy 40 points

    Hi Bill,

    Thanks for the help. We are in touch with TI's local office here. Will mail further queries if stuck.

    Tapan.