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LMK6C: could we implement interleaved 180 degree clock signal to parallel PWM controller with 300kHz fsw?

Ann_Lien
Genius 10640 points
Part Number: LMK6C
Other Parts Discussed in Thread: LMK6P, LMK6D, , LMK05318B

Hello expert,

could we implement interleaved 180 degree clock signal to parallel PWM controller with 300kHz fsw? 

Best regards,

Ann Lien

  • 0
    TI__Expert 6140 points

    Hi Ann, 

    Can you elaborate on your ask exactly? 

    So the requirement is 300 kHz. What is meant by 180 degree clock signal.... something like the n and the p side of the channel must be 180 phase shifted from each other? If so that is the case for differential signals. For the single ended, there's only 1 output. 

    I don't think I've properly understood your request, if you can elaborate on it hopefully I can provide better details. 

    Regards,

    Amin 

  • 0 in reply to Amin Eshraghi
    TI__Genius 10640 points

    Hello Amin,

    We need two clocks as below with 180 degrees interleaving. May we know if there is any implementation could share with customer? Thanks!

    Best regards,

    Ann Lien

  • 0 in reply to Ann_Lien
    TI__Expert 6140 points

    Hello Ann, 

    A differential clock will work this way. If you choose LMK6P (LVPECL) or LMK6D (LVDS) - the n and the p side of the channel are 180 phase shifted, meaning when 1 is high, the other is low. LMK6C is a single ended signal, so there is no alternative, inverted channel. 

    Secondly, LMK6 in general will support only MHz frequencies. 1 MHz and up. Your requirement is 300 kHz, correct? We have clock gens that support that low frequency. 

    Regards,

    Amin 

  • 0 in reply to Amin Eshraghi
    TI__Genius 10640 points

    Hello Amin,

    Yes, we need 300kHz. Do you have suitable clock gen could share with us? 

    Best regards,

    Ann Lien

  • +1 in reply to Ann_Lien
    TI__Expert 6140 points

    Hello Ann, 

    Our clock gens still require an external reference, (some crystal, some oscillator). They're intended to provide multiple outputs, anywhere from 4 - 16 from a common reference. 

    We don't have any standalone oscillator that can support 300 kHz. 

    If a clock gen is acceptable, then an external reference to it will be needed. Something like LMK05318B can provide as low as 1 Hz on Out 7. It does require a 10 - 50 MHz oscillator reference. 

    Regards,

    Amin