I am using the SI3402 chip to use POE.
But it does not work properly.
The circuit I have constructed is as follows.
POE: SI3402 (non-isolated)
Ethernet Transceiver: H2019NL
When POE cable is plugged in, it charges for the first time but it becomes impossible to charge soon. I think that the POE side circuit is a problem because I operate normally when only 5V is applied to the charge IC.
Since it is confirmed that 5V is output from the output terminal, it is not a voltage problem.
I attach the schematic that I composed with PDF.
Please make sure that there is something strange in my circuit.
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I am using the SI3402-B chip to use POE（isolate）.
But it does not work when loading exceed 5V/1.3A.
When I remove the tvs diode of the Transformer primary，it can work at 5V/3A, what is the reason of this phenomenon？
We have an isolated PoE PD test board with an Si3402-B on board, using a Coilcraft FA2732 transformer to create an isolated +12V at the output.
Class detection works fine, but when starting the PSE, the output ramps to approx. 8V and then it aborts; the PSE reports OVL.
Do you see any obvious issue in the enclosed schematics? Can the opto-coupler have a significant influence on the boot-up process?
Thanks for your help.
We are testing a DC-DC converter and the gate driver is Si8233BD. A 50kHz, 3.3V PWM is generated from the TI28377S launchpad (DSP) and is given to the driver IC (VIA, VIB). We are getting the VOA output pulses, but the VOB is always clamped to high. Please find the attached schematics. Could you please help us to resolve the issue.
What is the difference between Si8655BA-B-IU and Si8655BA-C-IU
If it's in the datasheet , I really can't see it.
Extra credit: Why is the small-pitch package called a "QSOP?" I expected pins on four sides.