Microsemi Corporation
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TL431BIDM
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TL431BIDM

Product Overview

Category

The TL431BIDM belongs to the category of voltage references.

Use

It is primarily used as a precision shunt regulator.

Characteristics

  • High accuracy
  • Low temperature coefficient
  • Wide operating voltage range
  • Adjustable output voltage
  • Low dynamic impedance

Package

The TL431BIDM is available in a small outline package (SOT-23) which allows for easy integration into various electronic circuits.

Essence

The essence of TL431BIDM lies in its ability to provide a stable and precise reference voltage, making it suitable for applications requiring accurate voltage regulation.

Packaging/Quantity

The TL431BIDM is typically packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

  • Reference Voltage: 2.5V to 36V
  • Operating Temperature Range: -40°C to +85°C
  • Output Current: Up to 100mA
  • Reference Voltage Tolerance: ±1%
  • Dynamic Output Impedance: 0.22Ω

Detailed Pin Configuration

The TL431BIDM 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 regulated output voltage.

Functional Features

  • Voltage Regulation: The TL431BIDM compares the reference voltage at the Reference pin with an external voltage divider network to regulate the output voltage.
  • Adjustable Output: By changing the resistors in the voltage divider network, the output voltage can be adjusted within the specified range.
  • Overvoltage Protection: The TL431BIDM protects against overvoltage conditions by shunting excess voltage to the cathode.

Advantages and Disadvantages

Advantages

  • High accuracy and stability
  • Wide operating voltage range
  • Adjustable output voltage
  • Low dynamic impedance

Disadvantages

  • Limited output current capacity (up to 100mA)
  • Requires external resistors for voltage adjustment

Working Principles

The TL431BIDM operates based on the principle of a shunt regulator. It compares the reference voltage at the Reference pin with the divided voltage from an external resistor network. By adjusting the resistors in the network, the output voltage can be precisely regulated.

Detailed Application Field Plans

The TL431BIDM finds applications in various fields, including:

  1. Power Supplies: It is used for voltage regulation in power supply circuits.
  2. Battery Charging: The TL431BIDM ensures precise charging voltage control in battery charging circuits.
  3. Audio Amplifiers: It provides stable biasing voltages for audio amplifier circuits.
  4. Voltage Monitoring: It is employed in voltage monitoring circuits to trigger alarms or shutdown systems when voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

Some alternative models to TL431BIDM include:

  1. LM431: A similar shunt regulator with adjustable output voltage.
  2. TLV431: A low-voltage version of the TL431 with a reference voltage range of 1.24V to 6V.
  3. LT1634: A precision voltage reference with a fixed output voltage.

These alternative models offer similar functionality and can be used as substitutes depending on specific requirements.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением TL431BIDM в технических решениях.

Sure! Here are 10 common questions and answers related to the application of TL431BIDM in technical solutions:

  1. Q: What is TL431BIDM? A: TL431BIDM is a programmable precision voltage reference integrated circuit (IC) that can be used in various technical applications.

  2. Q: What is the purpose of TL431BIDM? A: TL431BIDM is primarily used as a voltage reference or shunt regulator to provide stable and accurate voltage levels in electronic circuits.

  3. Q: How does TL431BIDM work? A: TL431BIDM 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 TL431BIDM? A: The voltage range of TL431BIDM is typically from 2.5V to 36V, making it suitable for a wide range of applications.

  5. Q: Can TL431BIDM be used as a current regulator? A: Yes, TL431BIDM can be used as a current regulator by connecting it in series with a resistor and adjusting the reference voltage accordingly.

  6. Q: Is TL431BIDM suitable for high-precision applications? A: Yes, TL431BIDM is known for its high precision and low temperature coefficient, making it suitable for demanding applications that require accuracy.

  7. Q: Can TL431BIDM handle high currents? A: TL431BIDM has a maximum cathode current rating of 100mA, so it is not suitable for high-current applications. External transistors can be used to increase the current handling capability.

  8. Q: What are some typical applications of TL431BIDM? A: TL431BIDM is commonly used in power supplies, battery chargers, voltage regulators, audio amplifiers, and other electronic circuits that require stable voltage references.

  9. Q: Is TL431BIDM available in different package options? A: Yes, TL431BIDM is available in various package options such as SOT-23, SOIC, and TO-92, allowing flexibility in circuit design and integration.

  10. Q: Are there any precautions to consider when using TL431BIDM? A: Yes, some precautions include ensuring proper heat dissipation, avoiding excessive input voltage, and providing adequate decoupling capacitors for stability. The datasheet should be consulted for detailed guidelines.

Please note that the answers provided here are general and may vary depending on specific application requirements. It is always recommended to refer to the TL431BIDM datasheet and consult with technical experts for accurate and detailed information.