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SN6501-Q1: SN6501-Q1/SN6505B-Q1 layout compatibility

Part Number: SN6501-Q1
Other Parts Discussed in Thread: SN6501, SN6505B, SN6505A

Team,

I have read on the below E2E that to make a PCB compatible for both SN6501 and SN6505B it is enough to connect Pin6/CLK to GND on SN6501:
https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/599787/sn6501-transformer-driver-sn6501-second-source-available

-Can you please confirm this?
-Are the some other specific details that need to be taken into account to make a PCB compatible for both SN6501 and SN6505B (or accross all SN650x derivatives) ?

Thanks in advance!

A.

  • Hi AnBer,

    Thanks for reaching out.

    Your understanding is correct. SN6505B is in 6-pin SOT-23 package while SN6501 is in 5-pin SOT-23 package. If you design your system with SN6505B and connect CLK pin to GND in the PCB layout, then the system will be compatible to SN6501 as well. When SN6501 is replaced onto such SN6505B PCB, we do not expect any issues in device working. No other considerations needed for this switch.

    The above explanation also holds true for SN6505D, i.e., if the system is designed for SN6505D with CLK connected to GND then SN6501 can also work on that PCB without needing any change.

    SN6505A operates at a different switching frequency, hence, SN6501 can't be used with SN6505A transformer.

    This covers all SN650x devices, let me know if you have any further questions. Thanks.


    Regards,
    Koteshwar Rao

  • Hi AnBer,

    I am Manuel, a colleague of Koteshwar's working with SN650x devices. To clarify one comment from Koteshwar's previous reply:

    SN6505A operates at a different switching frequency, hence, SN6501 can't be used with SN6505A transformer.


    The switching frequency of SN6505A is slower than for SN6501, therefore transformers compatible with SN6505A are compatible with SN6501 in terms of V-t product, however transformers used with SN6501 are typically not compatible with SN6505A.

    Please let us know if you have any additional questions regarding this.


    Thank you,
    Manuel Chavez