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.
Ngôi Nhà Gấu Bông - Địa chỉ cung cấp sản phẩm gấu bông, thú nhồi bông đẹp - rẻ - chất lượng chính hãng tại Hà Nội. Đến với shop, bạn sẽ có những sự lựa chọn tốt nhất về sản phẩm mà không cần phải lo lắng đến chất liệu sản phẩm hay giá thành.
I can not understand the calculation in AN901 on page 22 equation 65/65. If i put in the values R5 = 48.1x10^3, n = 3, C = 16uF and Rload = 5V/1A i get an fc of 129kH and not 12kHz. Am I assuming the wrong values?
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.
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Question about si3402
Hello,
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: W5500
Ethernet Transceiver: H2019NL
Charging: BQ25601
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.
Thank you.
Lead finish/Plating
Địa chỉ cung cấp gấu bông tại Hà Nội
Ngôi Nhà Gấu Bông - Địa chỉ cung cấp sản phẩm gấu bông, thú nhồi bông đẹp - rẻ - chất lượng chính hãng tại Hà Nội. Đến với shop, bạn sẽ có những sự lựa chọn tốt nhất về sản phẩm mà không cần phải lo lắng đến chất liệu sản phẩm hay giá thành.
Truy cập ngay: https://ngoinhagaubong.com/
failure rate of SI8661BC
Si3402-B design (+12V) with FA2732 possible?
Hello,
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.
Why is Si8662BB-B-IS1 getting too hot?
Hello Everybody,
Does anyone knows why the Si8662BB-B-IS1 digital isolator is getting too hot in the attached application? Thank you and Regards,
Spice model for Si827x and Si823X
Hi all,
Is there anyone who has spice model for Si827x and Si823x series gate driver?
Spice model for Si827x and Si823X
Hi all,
Is there anyone who has spice model for Si827x and Si823x series gate driver?
Spice model for Si827x and Si823X
Hi all,
Is there anyone who has spice model for Si827x and Si823x series gate driver?
Spice model for Si827x and Si823X
Hi all,
Is there anyone who has spice model for Si827x and Si823x series gate driver?
Spice model for Si827x and Si823X
Hi all,
Is there anyone who has spice model for Si827x and Si823x series gate driver?
Compensation Network AN901
Loading about SI3402b
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？
Si8233 PWM Outputs
Hello,
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.
Thanks
Si8655BA-B-IU vs Si8655BA-C-IU
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.