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LP8863-Q1: LP8863-Q1 not setting boost FSW frequency and PWM frequency

Brent Larsen
Prodigy 95 points
Part Number: LP8863-Q1

LP8863-Q1 not setting boost FSW frequency and PWM frequency when enable is not high? If when powering ON and enable is low (off) boost FSW frequency and PWM frequency will not set it defaults to 300kHz and 150Hz?

When enable is high at power up it set the boost FSW frequency and PWM frequency correctly (in my design set 2.2MHz and 19.5kHz with 140K ohm resistors)?

  • 0
    TI__Genius 15776 points

    Hello,

    When the device is disenable, the device don't work.And the fsw is set by external resistor.Could you tell me what's the meaning of setting frequency?Do I mistake something?And could you tell me your application, and the key issue you face. You can just describe the phenomenon you see and offer the schematic and waveform to further discuss.