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  Michael Pahl

  • 4 hours ago
  • Power management
  • Power management forum

  RE: Asking for the POE PSE's behavior

  Hello SHH, The 10mA requirement is called the Maintain Power Signature (MPS). If the MPS signal is not detected (i.e. the PD is not drawing more than 10mA of current), then the PSE will remove power and retry detection. If the PD does not draw 10mA...
• 

  Shinichi Inoue

  • 1 month ago
  • Power management
  • Power management forum

  TPS23734: Relationship between IEC62368-3 and POE

  TI Thinks Resolved

  Part Number: TPS23734 Dear Specialists, My customer is considering TPS23734 and has a question. I would be grateful if you could advise. --- We are not familiar with IEC62368-3, so could you please let us know. Part 3 of IEC62368-3 has a description...
• 

  Michael Pahl

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23734: The Circuit to Pass the IEC61000-6-3 Standard

  Hello Shinichi, 1. Here is a paper on it: https://www.ti.com/lit/an/slua469/slua469.pdf?ts=1599679432820&ref_url=https%253A%252F%252Fwww.google.com%252F 2. EN55022 compliance is a system level thing. As they say in their datasheet: We...
• 

  Michael Pahl

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23734: Custom design for PoE IEEE802.3bt Type3 Calss4 25.5W at PD

  David, I got confused because the PSIL095 is being designed with different BOMs that produce different output voltages. However, the PSIL095 on my desk is 5V, so I was I was thrown off. It slipped my mind that these designs still have the same PSIL...
• 

  Michael Pahl

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23731

  Hello David, 1. ) The TPS23734 will be similar, but the TPS23731 will not have the additional gate drive. We can discuss further in private messenger. 2.) There is not a PSR flyback transformer calculator. The inductance and turns ratios are going...
• 

  d_zero

  • 1 month ago
  • Power management
  • Power management forum

  TPS23734EVM-094: Reset winding Question

  • Resolved

  On The TPS23734 EVM the transformer T2 has additional primary winding (pin 4 and 5). If i understand correctly
• 

  Michael Pahl

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23754: About UVLO rising settings

  Hello, The difference is when the IC turns on. VC is the input power for the IC for it's DCDC. So the DCDC will turn on when the UVLO rising voltage is met. The difference is just an inherent part of the silicon how it is built. Yes a target...
• 

  Brett Colteaux

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23730: When is the RTM of TPS23730

  Hi Shinichi, The TPS23730 and the TPS23734 will both RTM around the same time in October 2020 timeframe. Please let me know if you have any additional questions and thank you very much for your interest in Texas Instruments PoE devices. Best Regards...
• 

  Darwin Fernandez

  • 1 month ago
  • Power management
  • Power management forum

  RE: TPS23753A: Regarding the FET circuit on the secondary side

  Hi Kaji-san, The self driven flyback is not recommended for 24V outputs as you will find that it is difficult to minimize shoot through losses for high output voltages. This means the efficiency will NOT be any higher than a diode rectified flyack....
• 

  Michael Pahl

  • 2 months ago
  • Power management
  • Power management forum

  RE: TPS23730EVM-093: When we plug-In 802.3at 30W PoE Injector into a 802.3bt 60W Sink with PD Class selected for 60W Requirement. Will it going to operate the device till 30W consumption or there will be No power up on sink side.

  Hello, If the PD presents a valid detection and classification, the PSE should apply power. Below is a picture of the TPS23730EVM-093 when connected to a Type 2 (IEEE802.3.at 30W) PSE: You can see the detection, class and power up on VDD_VSS...

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