STMicroelectronics
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TL431ACZT
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TL431ACZT

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Reference
  • Characteristics: Adjustable Precision Shunt Regulator
  • Package: TO-92, SOT-23, SOIC-8
  • Essence: Programmable Precision Reference
  • Packaging/Quantity: Tape & Reel, 2500 pieces per reel

Specifications

  • Reference Voltage Range: 2.495V to 36V
  • Output Current: 1mA to 100mA
  • Temperature Range: -40°C to +85°C
  • Line Regulation: 0.2% (typical)
  • Load Regulation: 0.4% (typical)
  • Reference Voltage Tolerance: ±0.5% (typical)

Detailed Pin Configuration

The TL431ACZT has three pins:

  1. Anode (A): Connected to the reference voltage input.
  2. Cathode (K): Connected to the ground or output voltage.
  3. Reference (R): Provides the regulated output voltage.

Functional Features

  • Programmable output voltage with a single external resistor.
  • Low dynamic impedance ensures good stability.
  • High accuracy and temperature stability.
  • Wide operating voltage range.
  • Low output noise.

Advantages

  • Easy to use and implement in various applications.
  • Provides stable and accurate voltage references.
  • Can be used as a precision shunt regulator or voltage reference source.
  • Low cost and widely available.

Disadvantages

  • Limited output current capability.
  • Requires an external resistor for programming the output voltage.
  • Sensitivity to temperature variations.

Working Principles

The TL431ACZT is a three-terminal adjustable precision shunt regulator. It operates by comparing the reference voltage at the Reference pin (R) with the voltage at the Anode pin (A). The output voltage is regulated by adjusting the current flowing through an external resistor connected between the Cathode pin (K) and the Anode pin (A).

Detailed Application Field Plans

The TL431ACZT is commonly used in various applications, including:

  1. Voltage regulation in power supplies.
  2. Battery chargers and adapters.
  3. Switching regulators and inverters.
  4. Precision measurement instruments.
  5. Audio amplifiers and preamplifiers.
  6. LED drivers and lighting control circuits.

Detailed and Complete Alternative Models

  • TL431BQDBZR: SOT-23 package, adjustable precision shunt regulator.
  • TLV431BIDBVR: SOT-23 package, low-voltage adjustable precision shunt regulator.
  • LM4040CIM3-2.5/NOPB: SOT-23 package, precision micropower shunt voltage reference.

These alternative models offer similar functionality and can be used as substitutes for the TL431ACZT in various applications.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af TL431ACZT i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of TL431ACZT in technical solutions:

  1. Q: What is TL431ACZT? A: TL431ACZT is a three-terminal adjustable precision shunt regulator that can be used in various technical applications.

  2. Q: What is the purpose of TL431ACZT? A: TL431ACZT is commonly used to provide stable voltage references, voltage regulation, and error amplification in electronic circuits.

  3. Q: How does TL431ACZT work? A: TL431ACZT compares the reference voltage with an external voltage divider network and adjusts its output accordingly to maintain a stable voltage.

  4. Q: What is the voltage range of TL431ACZT? A: TL431ACZT operates within a voltage range of 2.5V to 36V.

  5. Q: Can TL431ACZT be used as a voltage regulator? A: Yes, TL431ACZT can be used as a voltage regulator by connecting it in a feedback loop with an operational amplifier.

  6. Q: What are the typical applications of TL431ACZT? A: TL431ACZT is commonly used in power supplies, battery chargers, audio amplifiers, and other electronic circuits requiring precise voltage regulation.

  7. Q: How accurate is TL431ACZT in voltage regulation? A: TL431ACZT has a high level of accuracy, typically within ±1% of the desired output voltage.

  8. Q: Can TL431ACZT handle high currents? A: TL431ACZT can handle currents up to 100mA, making it suitable for low to moderate power applications.

  9. Q: How can TL431ACZT be protected from overvoltage? A: TL431ACZT can be protected from overvoltage by adding a series resistor and a Zener diode to limit the voltage across it.

  10. Q: Are there any precautions to consider when using TL431ACZT? A: Yes, it is important to ensure proper heat dissipation, avoid exceeding the maximum ratings, and follow the recommended circuit layout guidelines provided in the datasheet.

Please note that these answers are general and may vary depending on specific applications and requirements.