Other Parts Discussed in Thread: PMP9563
My customer has designed POE circuit based on TPS23754EVM-383.
The Switching MOSFET is used Si4848DY, it is same as TPS23754EVM-383.
The questions are listed below, could you please advise.
(1)They measured FET loss with calculating VDS and ID measured by oscilloscope at the condition of Vinmax(57V) and Imax(2.5A).
The average power dissipation(MOSFET:Q6) is 3.67W and theta(j-a) max is 82deg/W, therefore junction temperature is 154.4deg that means overs Absolute maximum rating(150deg).
Could it possible to think Si4848 cannot use for maximum input voltage and maximum current.
(2)The customer'd like to confirm the switching waveform of TPS23754EVM-383, could you please provide.
Their circuit has a power dissipation due to spike noise, so they'd like to confirm the EVM's waveform.
I appreciate your great help in advance.