ON Semiconductor
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TL431CDR2
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TL431CDR2

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage reference and shunt regulator
  • Characteristics: Adjustable precision, low power consumption, high stability
  • Package: SOIC-8 (Small Outline Integrated Circuit)
  • Essence: TL431CDR2 is a three-terminal adjustable precision shunt regulator that can be used to provide a stable reference voltage in various electronic circuits.
  • Packaging/Quantity: Available in reels of 2500 units

Specifications

  • Reference Voltage Range: 2.495V to 36V
  • Output Current: Up 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

Pin Configuration

The TL431CDR2 has the following pin configuration:

  1. Anode (A): Connected to the positive supply voltage
  2. Cathode (K): Output terminal, provides the regulated voltage
  3. Reference (Ref): Connected to a resistive voltage divider to set the desired output voltage

Functional Features

  • Adjustable Output Voltage: The output voltage can be precisely adjusted using an external resistive voltage divider.
  • Low Power Consumption: The TL431CDR2 operates with very low quiescent current, making it suitable for battery-powered applications.
  • High Stability: It offers excellent temperature stability and low output voltage drift over a wide range of operating conditions.

Advantages and Disadvantages

Advantages: - Wide operating voltage range - High accuracy and precision - Low output impedance - Fast response time

Disadvantages: - Limited output current capability - Requires an external voltage divider for precise voltage setting

Working Principles

The TL431CDR2 operates as a shunt regulator, maintaining a stable output voltage by comparing the reference voltage at the Ref pin with the voltage across the resistive voltage divider. It adjusts the current flowing through its internal transistor to keep the output voltage constant.

Detailed Application Field Plans

The TL431CDR2 is widely used in various electronic applications, including:

  1. Voltage References: It provides a stable reference voltage for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other precision measurement circuits.
  2. Switching Power Supplies: It is used as a feedback element to regulate the output voltage of switching power supplies.
  3. Battery Chargers: It can be employed in battery charging circuits to maintain a constant charging voltage.
  4. Audio Amplifiers: It is utilized in audio amplifiers to provide biasing and stabilization voltages.
  5. LED Drivers: It is used in LED driver circuits to regulate the forward voltage across LEDs.

Detailed and Complete Alternative Models

Some alternative models that can be considered as substitutes for the TL431CDR2 are:

  1. LM431: A similar adjustable precision shunt regulator offered by Texas Instruments.
  2. LT1634: A precision voltage reference IC provided by Linear Technology.
  3. MAX6126: An ultra-low-noise voltage reference IC manufactured by Maxim Integrated.

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

In conclusion, the TL431CDR2 is a versatile integrated circuit that serves as an adjustable precision voltage reference and shunt regulator. With its wide range of applications, high stability, and low power consumption, it is a popular choice among electronic designers.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan TL431CDR2 dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of TL431CDR2 in technical solutions:

  1. Q: What is TL431CDR2? A: TL431CDR2 is a programmable precision voltage reference integrated circuit (IC) commonly used in various technical applications.

  2. Q: What is the purpose of TL431CDR2? A: TL431CDR2 is primarily used as a voltage reference or shunt regulator to provide stable and accurate voltage levels in electronic circuits.

  3. Q: What is the operating voltage range of TL431CDR2? A: TL431CDR2 typically operates within a voltage range of 2.5V to 36V.

  4. Q: How does TL431CDR2 regulate voltage? A: TL431CDR2 compares the input voltage with an internal reference voltage and adjusts its output accordingly to maintain a constant voltage level.

  5. Q: Can TL431CDR2 be used as a current regulator? A: Yes, TL431CDR2 can be used as a current regulator by connecting it in series with a resistor and adjusting the reference voltage accordingly.

  6. Q: What are some typical applications of TL431CDR2? A: TL431CDR2 is commonly used in power supplies, battery chargers, voltage regulators, audio amplifiers, and other electronic circuits requiring precise voltage control.

  7. Q: Is TL431CDR2 suitable for high-frequency applications? A: TL431CDR2 is not specifically designed for high-frequency applications, but it can still be used in such circuits with proper consideration of its limitations.

  8. Q: What is the maximum output current of TL431CDR2? A: The maximum output current of TL431CDR2 is typically around 100mA, but it can vary depending on the specific model and operating conditions.

  9. Q: Can TL431CDR2 be used in automotive applications? A: Yes, TL431CDR2 is suitable for automotive applications as long as it meets the required specifications and operates within the specified temperature range.

  10. Q: Are there any precautions to consider when using TL431CDR2? 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 the specific application and requirements.