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TPS54331: Hot to obtain parameter "a" for the phase loss in equation (21)

Part Number: TPS54331


Hi Expert,

I am posting this on behalf of the customer.  

I am trying to plan the compensation components according to the specifications in the datasheet in chapter "8.2.2.7 Compensation Components".

Unfortunately, I can't compute the value for the phase loss in equation (21), because I don't understand what value I need to insert for the parameter "a" and I can't find any description for this.

I would be very pleased to get any information about this parameter "a" and how I can deduce this value.

Thank you in advance for your support.

Best regards,

Jonathan