ADUM3470 in sync mode

Hello ,
Is it possible to synchronize frequency of internal oscillator if I will add 1MHz signal  to OC pin from external occillator ?

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  • +1
    •  Analog Employees 
    on Nov 21, 2019 3:11 PM

    Marsel: The ADuM3470 datasheet describes the OSC function and does not have a sync function, just a resistor setting for the OC pin to GND, as stated below:

    SWITCHING FREQUENCY

    The ADuM347x switching frequency can be adjusted from 200 kHz to 1 MHz by changing the value of the ROC resistor shown in Figure 38, Figure 39, and Figure 40. The value of the ROC resistor needed for the desired switching frequency can be determined from the switching frequency vs. ROC resistance curve shown in Figure 9. The output filter inductor value and output capacitor value for the ADuM347x application schematics have been designed to be stable over the switching frequency range of 500 kHz to 1 MHz, when loaded from 10% to 90% of the maxi-mum load.

    Regards, Brian

Reply
  • +1
    •  Analog Employees 
    on Nov 21, 2019 3:11 PM

    Marsel: The ADuM3470 datasheet describes the OSC function and does not have a sync function, just a resistor setting for the OC pin to GND, as stated below:

    SWITCHING FREQUENCY

    The ADuM347x switching frequency can be adjusted from 200 kHz to 1 MHz by changing the value of the ROC resistor shown in Figure 38, Figure 39, and Figure 40. The value of the ROC resistor needed for the desired switching frequency can be determined from the switching frequency vs. ROC resistance curve shown in Figure 9. The output filter inductor value and output capacitor value for the ADuM347x application schematics have been designed to be stable over the switching frequency range of 500 kHz to 1 MHz, when loaded from 10% to 90% of the maxi-mum load.

    Regards, Brian

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