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Showing 45 results View by: Thread Post Sort by
  • Satoshi
    Satoshi
    • over 2 years ago
    • Power management
    • Power management forum

    LM431: Stability Boundary Condition for High Iz condition

    TI Thinks Resolved
    Part Number: LM431 About stability boundary condition of LM431, datasheet P7 is described only Iz:10mA condition. Is there the other stability data for high Iz condition? (For example, Iz:22.5mA) Is LM431 applicable below design calculator? ...
  • Arpan Gupta
    Arpan Gupta
    • over 2 years ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum

    RE: TINA/Spice/LM431: Shunt Regulator Model Issues

    Hi, We have simulated the circuit (Fig. 21) and found that results are expected. Below is the test circuit and simulation result. K= 2.502V*(1+10k/1.487k)+ 30.73nA*4.5k =19.3V Also, if we configure the device to test off state cathode current...
  • Ethan T
    Ethan T
    • over 2 years ago
    • Power management
    • Power management forum

    RE: LM431: Need Shunt voltage Regulation in our device

    Hi Navendu, I am a little confused on why there are three crowbar circuits. Can you explain to me the application again. I may misunderstood something and the crowbar circuit may not be the best solution. Is the LM431 used to regulate to 5.7V? What...
  • leo kors86
    leo kors86
    • over 2 years ago
    • Power management
    • Power management forum

    LM431: LM431 partnumber

    • Resolved
    Part Number: LM431 i need a LM431 0,5% sot23 -40 to 85 but can not find it anywhere
  • Michael Pahl
    Michael Pahl
    • over 1 year ago
    • Power management
    • Power management forum

    RE: TPS23753A: The VC and GATE are unstable in TPS23753A

    Hello David, Thank you for providing the schematic. I am sorry to hear a board got damaged. The BAV99 is designed to have a small forward voltage, large breakdown voltage, and low capacitance. When hooked in the original configuration, it looks...
  • Sudharsan K
    Sudharsan K
    • over 3 years ago
    • Power management
    • Power management forum

    RE: LM431: Output Voltage oscillates by 20mV against Set point of 10V.

    Hi Kai & Marcoo, Thanks for your support. We would try the recommended testing conditions.
  • David Baba
    David Baba
    • over 1 year ago
    • Power management
    • Power management forum

    RE: LM5117: CC/CV maximum voltage CC for 57 V input

    Hello Jason, can you measure the voltage at the Anode of the reference? I am estimating 0.8V+0.35V+2.5V = 3.65V at the ref pin of the LM431. With a 10k bottom FB resistor the top FB resistor should be 113k. The device will clamp to around...
  • murali kandasamy
    murali kandasamy
    • over 3 years ago
    • Power management
    • Power management forum

    RE: LM431: Case temperature vs operating temperature

    Hi, The above is our application circuit. This is based on section 9.2.1 Shunt Regulator of the LM431 datasheet. A regulated output of 10V is derived from 15V. The R39 was increased from 47R to 68R to keep the cathode current within the 100mA limit...
  • Liang Han
    Liang Han
    • over 4 years ago
    • Power management
    • Power management forum

    LM431 oscillation

    • Resolved
    I have an design with LM431 . It seems have oscillation which burn off the current limiting resistor
  • Pokkun
    Pokkun
    • over 4 years ago
    • Power management
    • Power management forum

    Could you tell me about LM431's "Fast Turnon Response"?

    I'm sorry. Since I have not been replying, I will post the same post. -------------------------------------------------------------------------------------------------------- Hello. My customer is evaluating for the purpose of adopting LM431...
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