Nexperia USA Inc.
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TL431AFDT,215
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TL431AFDT,215

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Reference
  • Characteristics: Adjustable Precision Shunt Regulator
  • Package: SOT-23
  • Essence: Programmable Precision Reference
  • Packaging/Quantity: Tape and Reel, 3000 pieces 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)

Detailed Pin Configuration

The TL431AFDT,215 has three pins:

  1. Anode (A): Connected to the reference voltage input.
  2. Cathode (K): Connected to the ground or negative supply voltage.
  3. Reference (R): Provides the regulated output voltage.

Functional Features

  • Programmable output voltage with a simple two-resistor divider network.
  • High precision and stability over temperature and time.
  • Low dynamic impedance ensures good load regulation.
  • Wide operating voltage range allows for versatile applications.
  • Low output noise and low quiescent current consumption.

Advantages and Disadvantages

Advantages: - Easy to use and implement in various circuits. - Provides precise and stable voltage references. - Can be used as a voltage regulator or voltage monitor. - Low cost and widely available in the market.

Disadvantages: - Requires external resistors for voltage programming. - Limited output current capability compared to other regulators. - Not suitable for high-power applications.

Working Principles

The TL431AFDT,215 is a three-terminal adjustable shunt regulator. It operates by comparing the reference voltage at the Reference (R) pin with an external voltage divider network connected to the Anode (A) and Cathode (K) pins. By adjusting the resistors in the divider network, the output voltage can be set to the desired value. The TL431AFDT,215 then regulates the current flowing through the Cathode (K) pin to maintain a stable output voltage.

Detailed Application Field Plans

The TL431AFDT,215 is widely used in various applications, including:

  1. Voltage Regulation: It can be used as a precision voltage regulator in power supplies, battery chargers, and DC-DC converters.
  2. Voltage Monitoring: It can be used as a voltage monitor to provide overvoltage protection or undervoltage detection in automotive electronics, industrial control systems, and battery management circuits.
  3. Reference Voltage Source: It can be used as a stable reference voltage source for analog-to-digital converters, digital-to-analog converters, and other precision measurement circuits.

Detailed and Complete Alternative Models

Some alternative models to TL431AFDT,215 are:

  1. TL431BQDBZR: SOT-23 package, adjustable precision shunt regulator.
  2. TLVH431AQDBZR: SOT-23 package, low-voltage adjustable precision shunt regulator.
  3. LM4040CIM3-4.1/NOPB: SOT-23 package, precision micropower shunt voltage reference.

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

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Énumérez 10 questions et réponses courantes liées à l'application de TL431AFDT,215 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of TL431AFDT,215 in technical solutions:

  1. Q: What is TL431AFDT,215? A: TL431AFDT,215 is a programmable precision voltage reference that can be used in various applications such as voltage regulation, overvoltage protection, and current limiting.

  2. Q: What is the operating voltage range of TL431AFDT,215? A: The operating voltage range of TL431AFDT,215 is typically between 2.5V and 36V.

  3. Q: How does TL431AFDT,215 provide voltage regulation? A: TL431AFDT,215 compares the reference voltage with an external voltage divider network and adjusts its output accordingly to maintain a stable regulated voltage.

  4. Q: Can TL431AFDT,215 be used for overvoltage protection? A: Yes, TL431AFDT,215 can be used as a shunt regulator to protect sensitive components from overvoltage conditions by diverting excess voltage to ground.

  5. Q: What is the typical output voltage accuracy of TL431AFDT,215? A: The typical output voltage accuracy of TL431AFDT,215 is ±2%.

  6. Q: Is TL431AFDT,215 suitable for current limiting applications? A: Yes, TL431AFDT,215 can be used as a current limiter by sensing the voltage drop across a sense resistor and adjusting its output to limit the current flow.

  7. Q: Can TL431AFDT,215 operate in high-temperature environments? A: Yes, TL431AFDT,215 has a wide temperature range and can operate in high-temperature environments up to 125°C.

  8. Q: Does TL431AFDT,215 require an external compensation network? A: No, TL431AFDT,215 has built-in compensation and does not require an external compensation network.

  9. Q: What is the typical quiescent current of TL431AFDT,215? A: The typical quiescent current of TL431AFDT,215 is around 1mA.

  10. Q: Can TL431AFDT,215 be used in battery charging applications? A: Yes, TL431AFDT,215 can be used in battery charging circuits to regulate the charging voltage and protect the battery from overcharging.

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