ON Semiconductor
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TL431BVPG
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TL431BVPG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Reference
  • Characteristics: Adjustable, Precision, Shunt Regulator
  • Package: TO-92 (Through-Hole)
  • Essence: Programmable Precision Reference
  • Packaging/Quantity: Bulk Packaging, 1000 units per reel

Specifications

  • Reference Voltage Range: 2.495V to 36V
  • Output Current: 1mA to 100mA
  • Operating Temperature Range: -40°C to +85°C
  • Line Regulation: 0.2% typical
  • Load Regulation: 0.4% typical
  • Temperature Stability: 50ppm/°C typical
  • Reference Input Current: 0.5μA typical
  • Cathode Current: 1mA to 100mA
  • Anode Current: 10mA to 150mA

Pin Configuration

The TL431BVPG 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 Reference Voltage: The TL431BVPG allows precise adjustment of the reference voltage within a wide range.
  • Precision Voltage Reference: It provides a highly accurate and stable reference voltage for various applications.
  • Shunt Regulator: The device acts as a shunt regulator, maintaining a constant voltage across the load.
  • Programmable Operation: The TL431BVPG can be programmed using external resistors to set the desired output voltage.

Advantages and Disadvantages

Advantages

  • Wide operating voltage range
  • High precision and stability
  • Low temperature coefficient
  • Programmable output voltage
  • Low reference input current

Disadvantages

  • Limited output current capability
  • Requires external resistors for programming

Working Principles

The TL431BVPG is a three-terminal adjustable shunt regulator. It operates by comparing the reference voltage at the Reference (R) pin with an internal voltage divider. The device adjusts its cathode current to maintain a constant voltage drop across the load, thereby regulating the output voltage.

Detailed Application Field Plans

The TL431BVPG finds applications in various fields, including:

  1. Power Supplies: It is used as a voltage reference in linear and switching power supplies.
  2. Battery Charging Systems: The TL431BVPG ensures accurate voltage regulation during battery charging.
  3. Voltage Monitoring: It can be employed for monitoring and controlling voltages in electronic circuits.
  4. Audio Amplifiers: The device helps maintain stable biasing voltages in audio amplifier circuits.
  5. LED Drivers: It is utilized in LED driver circuits to regulate the forward voltage of LEDs.

Detailed and Complete Alternative Models

Some alternative models to the TL431BVPG include:

  1. TL431ACLP: SOT-23 package, adjustable precision shunt regulator.
  2. TLV431BQDBZR: SOT-23 package, low-voltage adjustable precision shunt regulator.
  3. LM4040CIM3-2.5/NOPB: SOT-23 package, precision micropower shunt voltage reference.

These alternatives offer similar functionality and characteristics, providing options based on specific requirements.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением TL431BVPG в технических решениях.

Sure! Here are 10 common questions and answers related to the application of TL431BVPG in technical solutions:

  1. Q: What is TL431BVPG? A: TL431BVPG is a programmable precision voltage reference integrated circuit that can be used in various technical applications.

  2. Q: What is the purpose of TL431BVPG? A: TL431BVPG is primarily used as a voltage reference or shunt regulator in electronic circuits to provide stable and accurate voltage levels.

  3. Q: How does TL431BVPG work? A: TL431BVPG compares the input voltage with an internal reference voltage and adjusts its output accordingly to maintain a constant voltage level.

  4. Q: What is the voltage range of TL431BVPG? A: TL431BVPG typically operates within a voltage range of 2.5V to 36V.

  5. Q: Can TL431BVPG be used as a voltage regulator? A: Yes, TL431BVPG can be used as a voltage regulator by connecting it in a feedback loop with an external transistor or MOSFET.

  6. Q: What are the typical applications of TL431BVPG? A: TL431BVPG is commonly used in power supplies, battery chargers, audio amplifiers, and other electronic circuits requiring precise voltage regulation.

  7. Q: How accurate is TL431BVPG? A: TL431BVPG has a high accuracy of typically ±1% over temperature and voltage variations.

  8. Q: Can TL431BVPG handle high currents? A: No, TL431BVPG is not designed to handle high currents directly. It is usually used in conjunction with an external transistor or MOSFET to handle higher currents.

  9. Q: Is TL431BVPG suitable for low-power applications? A: Yes, TL431BVPG is well-suited for low-power applications as it has a low quiescent current and can operate with low power supply voltages.

  10. Q: Are there any precautions to consider when using TL431BVPG? A: Yes, some precautions include ensuring proper decoupling capacitors, avoiding excessive heat dissipation, and following the manufacturer's guidelines for stability and component selection.

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