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TPS61378-Q1: FDITHER Fpattern in datasheet

Hollis Liu
Intellectual 2595 points
Part Number: TPS61378-Q1

Hi team, 

I would like to know what is F_DITHER and F_pattern in TPS61378-Q1 datasheet. And how to use them? Thanks. 

  • 0
    TI__Mastermind 34231 points

    Hi Hollis,

    TPS61378-Q1 has spread spectrum feature during FPWM. The TPS61378-Q1 uses a triangle waveform to spread the switching frequency with ±10% of normal frequency. The frequency of the triangle waveform is typically 0.4% of the switching frequency. For example, if the normal switching frequency of TPS61378-Q1 is programmed to 2.2 MHz, the spread spectrum function will modulate the switching frequency in the range of 1.98 MHz to 2.42 MHz in a triangle behavior with 8.8 kHz rate