• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 486 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UC1825 External clock syncronization

Ivo Lourenco
Prodigy 10 points

Other Parts Discussed in Thread: UC1825

 

Looking into UC1825 datasheet there is a section that say that the oscillator can be synchronized by and external pulse inserted in series with the timing capacitor.

In the datasheet in couldn´t find what should be the ideal voltage range of Vsync pulse that we must aplly to the CT pin.
There is here someone that can provide me this information?

Best regards,

  • 0
    TI__Mastermind 34465 points

    If you check the oscillator section of the data sheet:

    The peak of the ramp is 3.0 V.

    So if the pulse coupled on the timing capacitor (CT pin) results in an amplitude of 3.0 V  the PWM is terminated and you will have synchronized the UC1825 to this pulse.