TL431ACPW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23-3
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape & Reel, 3000 pieces per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Output Current: 1mA to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% typical
• Load Regulation: 0.4% typical
• Reference Voltage Tolerance: ±0.5%
• Cathode Current: 1mA to 100mA

Detailed Pin Configuration

The TL431ACPW is a three-pin device with the following pin configuration:

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 reference.
• Low dynamic output impedance.
• High accuracy and stability over temperature and time.
• Wide operating voltage range.
• Low power consumption.
• Fast response time.

Advantages and Disadvantages

Advantages

• Easy to use and implement in various applications.
• Provides precise and stable voltage references.
• Can be used as a voltage regulator or voltage reference source.
• Offers adjustable output voltage.
• Low cost and widely available.

Disadvantages

• Requires external components for proper operation.
• Limited output current capability.
• Sensitivity to noise and fluctuations in the input voltage.

Working Principles

The TL431ACPW is a precision shunt regulator that 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 voltage divider, the output voltage can be set to a desired value within the specified range.

The TL431ACPW continuously monitors the voltage at the Reference (R) pin and adjusts the current flowing through the Cathode (K) pin to maintain a stable output voltage. This feedback mechanism ensures that the output voltage remains constant even when the input voltage or load conditions change.

Detailed Application Field Plans

The TL431ACPW is widely used in various applications, including:

1. Voltage regulators: The TL431ACPW can be used as a precision voltage regulator in power supplies, battery chargers, and other electronic systems where a stable and accurate voltage reference is required.

2. Switching power supplies: It can be employed in switching power supply circuits to provide precise voltage references for control and feedback purposes.

3. Battery management systems: The TL431ACPW is utilized in battery management systems to monitor and regulate the charging and discharging of batteries, ensuring optimal performance and safety.

4. Audio amplifiers: It finds application in audio amplifier circuits to provide biasing and voltage stabilization for improved audio quality.

5. LED drivers: The TL431ACPW is used in LED driver circuits to regulate the current flowing through the LEDs, ensuring consistent brightness and longevity.

Detailed and Complete Alternative Models

Some alternative models to TL431ACPW include:

1. TLV431: Similar functionality and specifications, available in different package options.
2. LM4040: Precision shunt voltage reference with adjustable output voltage.
3. REF3030: Low-power, high-precision voltage reference with wide operating temperature range.
4. LT1236: Ultra-stable precision reference with low temperature coefficient.

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

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