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UCC2895: frequency

Part Number: UCC2895


1. What is the difference between "Frequency" and "Frequency total variation"? Does the frequency total variation mean that the frequency varies further from fosc?

For example, when fosc=500kHz, it varies from 475kHz to 525kHz. When fosc=527kHz, it varies from 500.65kHz to 553.35kHz.

2. Could you tell me more about why the fosc varies? Is it caused by the comparator or flip-flop shown below?

Best Regards,


  • Hello,

    I received your inquiry and it is under review.


  • Hello,

    The frequency is based on 25 degree C and the data sheet test conditions.  The frequency variation is based on variation in temperature and indicate the 25 degree C could vary +/- 2% more with variation in temperature.

    The frequency varies due to variation in process and production various.   This variation is due to comparator  thresholds, references, delays etc...