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Original question:

TL594: Want to sync two TL594

TL594: 45° Phase shift for two TL594

Koki Tsushima
Intellectual 825 points
Part Number: TL594

Hi experts,

I understood sync. can be easily achieved as follows.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1131042/tl594-want-to-sync-two-tl594

Customer wants to create other situation as follows.

  • Two TL594 Switching w/ 45° shift for both C1 and C2.
    • They use all C1 and C2. 

Is it possible to come true?

  • 0
    TI__Mastermind 30015 points

    Tsushima-san,

    If using an external clock, the synchronization function is easy and straight forward as you already know from this E2E post you referenced. If synchronizing two TL594 controllers, the same theory can be applied but you need to split the synchronization signal into two separate clock signals operating out of phase with respect to one another. For synchronizing two power stages, this is commonly done at 180° phase shift but you can shift the two signal with any amount of phase shift, such as 45° as you've suggested.

    Regards,

    Steve M

  • 0 in reply to Steven Mappus1
    TI__Intellectual 825 points

    Hi Steven-san,

    So you mean that additional circuit like comparator etc. is essential to be phased shift triangle wave from CT pin, 

    and cannot achieved phase shift except for 180° w/ just two tl594.

    Is this understanding correct?

     

    BR,

    Koki Tsushima

  • 0 in reply to Steven Mappus1
    TI__Intellectual 825 points

    Hi Steven-san,

    So you mean that additional circuit like comparator etc. is essential to be phased shift triangle wave from CT pin, 

    and cannot achieved phase shift except for 180° w/ just two tl594.

    Is this understanding correct?

     

    BR,

    Koki Tsushima

  • +1 in reply to Koki Tsushima
    TI__Mastermind 30015 points

    Tsushima-san,

    Shown below is an example of 2 clock signal phase shifted by 180° but your external synchronization clock circuit needs to be able to phase shift two signals by 45°

     Regards,

    Steve