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TPS65150-Q1: charge pump working frequency

Part Number: TPS65150-Q1
Other Parts Discussed in Thread: TPS65150

Hi, Sirs:

May I know TPS65150 VGH & VGL charge pump working freq.?

TPS65150 boost freq. is 1.2Mhz, but we find about 100Khz EMI noise.

I think a possible cause is charge pump, but I can't got information form Datasheet.

Could you provide it for us?

  • Hello NObody,

    The oscillator frequency of the whole device is 1.2 MHz nominal. In the functional block diagram on page 11 as well as the detailed description on page 14ff, you can find that the charge pumps are working with 1.2 MHz as well.

    Often EMI noise is caused by a transient load profile. Is it possible that you have a load that is changing at the 100 kHz you observe?

    Best regards,
    Brigitte
  • Hi, Brigitte:

    thanks for your reply, I will check load first.