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TL431BQDE4
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TL431BQDE4

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: SOT-23 (3-Pin)

Essence: The TL431BQDE4 is a precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.

Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

  • Reference Voltage Range: 2.495V to 36V
  • Operating Current Range: 1mA to 100mA
  • Temperature Range: -40°C to +85°C
  • Initial Accuracy: ±0.5%
  • Temperature Stability: ±50ppm/°C

Detailed Pin Configuration

The TL431BQDE4 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

  • Programmable Output Voltage: The TL431BQDE4 allows the user to set the desired output voltage by connecting external resistors.
  • Low Dynamic Output Impedance: Ensures stability and accuracy of the output voltage even under varying load conditions.
  • Wide Operating Current Range: Can handle a wide range of current requirements, making it suitable for various applications.
  • High Accuracy and Temperature Stability: Provides precise and stable reference voltage over a wide temperature range.

Advantages and Disadvantages

Advantages: - Easy to use and implement in circuits. - Provides a stable and accurate reference voltage. - Wide operating current range allows for flexibility in design. - Low dynamic output impedance ensures stability under varying load conditions.

Disadvantages: - Requires external resistors for voltage programming. - Limited temperature range of -40°C to +85°C.

Working Principles

The TL431BQDE4 operates as a shunt regulator, maintaining a constant reference voltage between the reference pin (R) and the cathode pin (K). By adjusting the resistance connected to the reference pin, the output voltage can be programmed to the desired value. The internal circuitry of the TL431BQDE4 compares the reference voltage with the feedback voltage from the cathode pin and adjusts the current flowing through the device to maintain a stable output voltage.

Detailed Application Field Plans

The TL431BQDE4 is widely used in various applications, including:

  1. Voltage Regulation: Provides a stable reference voltage for voltage regulators and power supplies.
  2. Battery Charging: Used in battery charging circuits to maintain a constant charging voltage.
  3. Audio Amplifiers: Ensures accurate biasing and stability in audio amplifier circuits.
  4. Switching Power Supplies: Used as a feedback element to regulate the output voltage of switching power supplies.
  5. LED Lighting: Provides precise voltage regulation for LED lighting applications.

Detailed and Complete Alternative Models

Some alternative models to TL431BQDE4 include:

  1. TLV431AIDBZR
  2. LM4040CIM3-2.5/NOPB
  3. REF3030AIDBZT
  4. MAX6006BEURT25+
  5. LT1461ACS8-5#PBF

These alternatives offer similar functionality and characteristics, providing options for different design requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací TL431BQDE4 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of TL431BQDE4 in technical solutions:

  1. Q: What is TL431BQDE4? A: TL431BQDE4 is a precision programmable reference voltage regulator that can be used in various technical applications.

  2. Q: What is the voltage range of TL431BQDE4? A: The voltage range of TL431BQDE4 is typically from 2.5V to 36V.

  3. Q: How does TL431BQDE4 work? A: TL431BQDE4 works by comparing the reference voltage with an external voltage divider network, and then adjusting its output accordingly.

  4. Q: Can TL431BQDE4 be used as a voltage regulator? A: Yes, TL431BQDE4 can be used as a voltage regulator by connecting it in a feedback loop with an external transistor or MOSFET.

  5. Q: What are the typical applications of TL431BQDE4? A: TL431BQDE4 is commonly used in power supplies, battery chargers, LED drivers, audio amplifiers, and other precision voltage regulation circuits.

  6. Q: Is TL431BQDE4 suitable for high-frequency applications? A: TL431BQDE4 is not specifically designed for high-frequency applications, but it can still be used in such circuits with proper precautions.

  7. Q: Can TL431BQDE4 handle high currents? A: TL431BQDE4 has a maximum current rating of 100mA, so it is suitable for low to moderate current applications.

  8. Q: How accurate is TL431BQDE4 as a voltage reference? A: TL431BQDE4 has a typical reference voltage accuracy of ±1%, which makes it suitable for many precision applications.

  9. Q: Can TL431BQDE4 operate in harsh environments? A: TL431BQDE4 has a wide operating temperature range of -40°C to 125°C, making it suitable for various industrial and automotive applications.

  10. Q: Are there any alternative devices to TL431BQDE4? A: Yes, some alternative devices to TL431BQDE4 include LM431, TLV431, and LT431, which have similar functionalities but may have different specifications.

Please note that the answers provided here are general and may vary depending on specific datasheet information and application requirements.