STMicroelectronics
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TL431IZ-AP
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TL431IZ-AP

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Adjustable Precision Shunt Regulator - Programmable Output Voltage - Low Dynamic Output Impedance - Wide Operating Current Range - High Accuracy and Temperature Stability

Package: TO-92, SOT-23, SOIC-8

Essence: The TL431IZ-AP is a three-terminal adjustable precision shunt regulator. It provides a highly accurate reference voltage that can be programmed to any desired value between the reference voltage (Vref) and 36 volts.

Packaging/Quantity: The TL431IZ-AP is available in various packaging options, including TO-92 (bulk), SOT-23 (tape and reel), and SOIC-8 (tube). The quantity per package depends on the specific packaging option chosen.

Specifications

  • Reference Voltage (Vref): 2.495V - 36V
  • Operating Current Range (IKA): 1mA - 100mA
  • Cathode Current (IK): 1mA - 150mA
  • Dynamic Output Impedance (Rd): 0.22Ω (typical)
  • Temperature Range: -40°C to +85°C

Pin Configuration

The TL431IZ-AP has three pins:

  1. Anode (A): Connected to the positive supply voltage.
  2. Cathode (K): Connected to the load or ground.
  3. Reference (R): Provides the adjustable reference voltage.

Functional Features

  • Adjustable Output Voltage: The TL431IZ-AP allows precise adjustment of the output voltage by using external resistors.
  • Voltage Reference: It provides a stable reference voltage for use in various applications.
  • Shunt Regulation: The device regulates the voltage by shunting excess current to the ground.
  • Low Dynamic Output Impedance: The TL431IZ-AP maintains a low output impedance, ensuring stability and accuracy in voltage regulation.

Advantages and Disadvantages

Advantages: - High accuracy and temperature stability - Wide operating current range - Programmable output voltage - Low dynamic output impedance

Disadvantages: - Requires external resistors for precise voltage adjustment - Limited maximum reference voltage (36V)

Working Principles

The TL431IZ-AP operates as a shunt regulator by comparing the reference voltage (Vref) with the feedback voltage obtained from the voltage divider network. It adjusts the shunt resistance to maintain a stable output voltage. By changing the resistor values in the voltage divider, the desired output voltage can be programmed.

Detailed Application Field Plans

The TL431IZ-AP finds applications in various fields, including:

  1. Power Supplies: Voltage regulation in power supply circuits.
  2. Battery Charging: Control of charging voltage in battery management systems.
  3. Audio Amplifiers: Biasing and stabilization of audio amplifier circuits.
  4. LED Drivers: Precise current control in LED driver circuits.
  5. Switching Power Supplies: Feedback control for stable operation.

Detailed and Complete Alternative Models

  1. TL431AIDBZR: SOT-23 package, adjustable precision shunt regulator.
  2. TL431BQDBZT: SOT-23 package, adjustable precision shunt regulator with enhanced stability.
  3. TL431CDR: SOIC-8 package, adjustable precision shunt regulator.

These alternative models offer similar functionality and characteristics to the TL431IZ-AP, providing flexibility in choosing the most suitable option for specific applications.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق TL431IZ-AP في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of TL431IZ-AP:

  1. Q: What is TL431IZ-AP? A: TL431IZ-AP is a three-terminal adjustable precision shunt regulator commonly used in technical solutions.

  2. Q: What is the purpose of TL431IZ-AP? A: TL431IZ-AP is used to provide a stable voltage reference or regulate voltage levels in various electronic circuits.

  3. Q: How does TL431IZ-AP work? A: TL431IZ-AP 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 TL431IZ-AP? A: The voltage range of TL431IZ-AP is typically from 2.5V to 36V, making it suitable for a wide range of applications.

  5. Q: Can TL431IZ-AP be used as a voltage regulator? A: Yes, TL431IZ-AP can be used as a voltage regulator by connecting it in a feedback loop with an operational amplifier and other components.

  6. Q: What are the typical applications of TL431IZ-AP? A: TL431IZ-AP is commonly used in power supplies, battery chargers, LED drivers, audio amplifiers, and other circuits requiring precise voltage regulation.

  7. Q: Is TL431IZ-AP suitable for high-current applications? A: TL431IZ-AP has a maximum current rating of around 100mA, so it is more suitable for low to moderate current applications.

  8. Q: Can TL431IZ-AP be used in automotive applications? A: Yes, TL431IZ-AP is often used in automotive applications such as voltage regulation in car audio systems or as a reference for sensor circuits.

  9. Q: How do I set the output voltage of TL431IZ-AP? A: The output voltage of TL431IZ-AP can be set by adjusting the external voltage divider network connected to its reference pin.

  10. Q: Are there any precautions to consider when using TL431IZ-AP? A: Yes, some precautions include ensuring proper heat dissipation, avoiding excessive input voltage, and providing adequate decoupling capacitors for stability.

Please note that these answers are general and may vary depending on specific circuit requirements and application scenarios.