ON Semiconductor
L'immagine può essere rappresentativa.
Vedi le specifiche per i dettagli del prodotto.
LM431ACZX
vedi dettagli Schede tecniche

LM431ACZX

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Reference
  • Characteristics: Adjustable, Precision, Shunt Regulator
  • Package: TO-92 (3-Lead)
  • Essence: The LM431ACZX is a precision adjustable shunt regulator that can be used to provide a stable reference voltage in various applications.
  • Packaging/Quantity: Available in reels of 2,500 units or tubes of 100 units.

Specifications

  • Reference Voltage Range: 2.5V to 36V
  • Operating Current Range: 1mA to 100mA
  • Temperature Range: -40°C to +85°C
  • Line Regulation: 0.4% (Typical)
  • Load Regulation: 0.4% (Typical)

Pin Configuration

The LM431ACZX 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 Output: The LM431ACZX allows for precise adjustment of the output voltage using external resistors.
  • Precision Voltage Reference: Provides a stable and accurate reference voltage for use in various circuits.
  • Shunt Regulator: Acts as a shunt element to regulate the voltage across the load.
  • Low Quiescent Current: Consumes low current when not actively regulating the voltage.

Advantages and Disadvantages

Advantages: - Wide range of adjustable output voltages. - High accuracy and stability. - Low temperature coefficient. - Low quiescent current consumption.

Disadvantages: - Limited maximum operating current. - Requires external resistors for voltage adjustment.

Working Principles

The LM431ACZX operates as a shunt regulator by comparing the reference voltage at the Reference (R) pin with the voltage across the load. It adjusts the current flowing through the cathode (K) and anode (A) pins to maintain a stable output voltage. By adjusting the resistance connected to the Reference (R) pin, the output voltage can be precisely set.

Detailed Application Field Plans

The LM431ACZX is commonly used in various applications, including:

  1. Voltage References: Provides a stable reference voltage for analog-to-digital converters, voltage regulators, and other precision circuits.
  2. Battery Charging: Used in battery charging circuits to regulate the charging voltage and prevent overcharging.
  3. Switching Power Supplies: Ensures stable output voltage in switching power supply designs.
  4. Audio Amplifiers: Used as a biasing element to stabilize the operating point of audio amplifiers.
  5. LED Drivers: Regulates the current flowing through LEDs to maintain consistent brightness.

Detailed and Complete Alternative Models

Some alternative models to the LM431ACZX include:

  1. TL431ACD: Similar adjustable shunt regulator in SOIC-8 package.
  2. LM4040CIZ-2.5: Fixed 2.5V precision shunt voltage reference in TO-92 package.
  3. LT1009CZ-2.5: Precision reference voltage source in TO-92 package.

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

Word count: 346 words

10 domande e risposte comuni relative all'applicazione di LM431ACZX nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of LM431ACZX in technical solutions:

  1. Q: What is LM431ACZX? A: LM431ACZX is a programmable precision voltage reference that can be used as a shunt regulator or a voltage comparator in various technical applications.

  2. Q: How does LM431ACZX work as a shunt regulator? A: LM431ACZX compares the reference voltage with the feedback voltage and adjusts its output current to maintain a stable voltage across the load.

  3. Q: Can LM431ACZX be used as a voltage comparator? A: Yes, LM431ACZX can be used as a voltage comparator by comparing the input voltage with the reference voltage and providing a high or low output based on the comparison result.

  4. Q: What is the voltage range of LM431ACZX? A: The voltage range of LM431ACZX is typically from 2.5V to 36V.

  5. Q: Is LM431ACZX suitable for low-power applications? A: Yes, LM431ACZX is suitable for low-power applications as it has a low quiescent current and can operate at low voltages.

  6. Q: Can LM431ACZX handle high currents? A: LM431ACZX can handle currents up to 100mA, making it suitable for many medium-power applications.

  7. Q: Does LM431ACZX require an external voltage divider? A: Yes, LM431ACZX requires an external voltage divider to set the desired reference voltage.

  8. Q: Can LM431ACZX be used in automotive applications? A: Yes, LM431ACZX is suitable for automotive applications as it can operate over a wide temperature range and has good stability.

  9. Q: What are the typical applications of LM431ACZX? A: LM431ACZX is commonly used in power supplies, battery chargers, voltage regulators, and precision measurement circuits.

  10. Q: Is LM431ACZX available in different package options? A: Yes, LM431ACZX is available in various package options, including TO-92, SOT-23, and SOIC, to suit different application requirements.

Please note that these answers are general and may vary depending on specific datasheet specifications and application considerations.