Dear Specialists,
My customer is considering TPS2491 and has a question.
I would appreciate if you could advise.
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Formula (4) in the application note(SNVA683) is listed below.
VOUTcl = Vz2+Vd1-VTHQ1
where ❏ VOUTCL = Clamped Output Voltage
❏ VD1 = D1 Forward Voltage @ 1 mA
❏ VZ2 = Z2 Clamp Voltage @ 20 µA
❏ VTHQ1 = Q1 Threshold Voltage
Should VTHQ1 use the threshold voltage of the actual FET value ( usually 1~2V)?
Or should I use the gate output of TPS2491(12 ~ 16V)?
I think it should be used actual VTH of actual FET, is it correct?
I'd like to confirm just in case.
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I appreciate your great help in advance.
Best regards,
Shinichi
