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.

LM2841: Gate drove (CB) undervoltage lockout?

Part Number: LM2841

Please inform us CB under-voltage lockout operation details, such as threshold, occurring conditions and restart works?

What conditions does CB under-voltage lockout occur in?

How does LM2841 restart after under-voltage lockout?

  • Hello,
    I contacted design engineer for this product for more details.
    We will send an update as soon as we have more information
  • Hello,
    Cb under voltage lock out value is ~2.1V.
    This capacitor is charged using an internal diode during low period of switch node.
    Recommended value for bootstrap capacitor will depend on ratio between Vout and Vin. If input voltage is less than 2x of output voltage capacitor value between 0.15 and 1 uF is recommended, otherwise 0.15uF is recommended.
    It is recommended to verify that Cboot value other than recommended value (0.15uF) works under desired operating conditions.
    Hope this helps.