• 

  Thomas Amlee

  • over 1 year ago
  • Power management
  • Power management forum

  RE: TPS23756: TSPS23756 Output unstable and low efficiency

  Hi Vincent, 1. The voltage reference on the secondary side (D27) should be TLV431A (the low voltage variant)*** 2. How come you change the R9 resistor from 1k to 100ohm? Regards, Tom A.
• 

  Sean Martin15

  • over 1 year ago
  • Power management
  • Power management forum

  TLV431B-Q1: Stability Boundary Conditions Output Capacitance

  • Resolved

  is labelled for the TLV431A only. Please let me know if these conditions also apply to the TLV431B-Q1. I've
• 

  Jared Becker

  • over 2 years ago
  • Power management
  • Power management forum

  TLV431A-Q1: Evaluation Module

  TI Thinks Resolved

  Part Number: TLV431A-Q1 Hi Team, Is there by chance any sort of tiny evaluation module for these little shunt regulators? At the minimum, is there some sort of DIP package adapter? Thank you, Jared
• 

  Robert Rose79

  • over 1 year ago
  • Power management
  • Power management forum

  TLV431: Unclear value reference current

  • Resolved

  Part Number: TLV431 Hi all, I'm doing a theoretical voltage accuracy analysis on TLV431 Low-Voltage Adjustable Precision Shunt Regulator with Vka > Vref and I found some specifications in the datasheet, which don't make sense to me. Basically I try to find a minimum reference current for the...
• 

  Lonsn

  • over 5 years ago
  • Power management
  • Power management forum

  How to change TPS23751 reference design to support 12V/2A output

  Hi, Currently we implemented 5V/4.5A POE+ design using TPS23751, and the design is same as TPS23751 evm(slvu754a). It works well. Now we have a new requirement to implement 12V/2A output. We let the flyback transformer vendor change the secondary...
• 

  Jacob Kim

  • over 5 years ago
  • Power management
  • Power management forum

  To check TPS23753 schematics

  • Resolved

  ) & 5.1K (VDD 11.88V with 17.2mA) in no load condition. R21 : 2K -> 15K C19 : 10nF -> 6.8nF U3 : TLV431A
• 

  Darwin Fernandez

  • over 4 years ago
  • Power management
  • Power management forum

  RE: TPS23754/TPS23756 SOFT START RESISTOR VALUE CALCULATION

  Hi John, For setting the output voltage, choose RFBU that minimizes current through the divider (to maintain efficiency) and minimize VOUT offsets. Typically RFBU= 41.2k. RFBL = (VREF*RFBU)/(VOUT-VREF) VREF is the reference voltage of TLV431A...
• 

  venugopal krishnamurthy

  • over 5 years ago
  • Power management
  • Power management forum

  tps23754

  Answer Suggested

  we have designed custom proto board based on tps23754evm-383. we have followed the layouts as per the EVM we dont see any output at the Tp13 with Tp3.. output voltage shows zero we have measured voltages on EVM and our board and details are attached...

  • Yds_board_poe_voltages.xls
• 

  Eric Wright

  • over 8 years ago
  • Power management
  • Power management forum

  Re: Noisy TPS23754 Operation

  Your feedback section is missing a connection. Please see attached showing the missing connection and EVM section schematic for reference. Also, your U4 is TL431A (2.5V reference) and should be TL V 431A (1.25V reference).

  • TPS23754_Feedback.pdf
• 

  Bay Pan

  • over 7 years ago
  • Power management
  • Power management forum

  something about TLV431A

  • Resolved

  Hello I have something wrong with TLV431A ； I use it as the reference voltage IC to a DDR IC

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