TL431BQDBZRQ1

Product Overview

Category

The TL431BQDBZRQ1 belongs to the category of voltage references.

Use

It is commonly used as a precision shunt regulator in various electronic circuits.

Characteristics

• High precision: The TL431BQDBZRQ1 provides a highly accurate reference voltage.
• Adjustable output: It allows for adjustable output voltages through external resistors.
• Low temperature coefficient: The device exhibits low sensitivity to temperature changes.
• Low dynamic impedance: It maintains stable regulation even with varying load conditions.

Package

The TL431BQDBZRQ1 comes in a small SOT-23 package, which is widely used in surface mount applications.

Essence

The essence of TL431BQDBZRQ1 lies in its ability to provide a stable and precise reference voltage for regulating other electronic components.

Packaging/Quantity

The TL431BQDBZRQ1 is typically packaged in reels, containing a quantity of 3000 units per reel.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Temperature Range: -40°C to +125°C
• Output Current: Up to 100mA
• Dynamic Output Impedance: 0.22Ω (typical)

Detailed Pin Configuration

The TL431BQDBZRQ1 has three pins:

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

Functional Features

• Voltage Regulation: The TL431BQDBZRQ1 compares the reference voltage at the R pin with an external voltage divider network to regulate the output voltage.
• Adjustable Output: By changing the resistor values in the voltage divider network, the output voltage can be adjusted.
• Short Circuit Protection: The device incorporates internal short circuit protection, preventing damage in case of a short circuit condition.

Advantages and Disadvantages

Advantages

• High precision and stability
• Adjustable output voltage
• Low temperature coefficient
• Small package size for space-constrained applications

Disadvantages

• Limited output current capability (up to 100mA)
• Requires external resistors for voltage adjustment

Working Principles

The TL431BQDBZRQ1 operates based on the principle of feedback control. It compares the reference voltage at the R pin with the divided voltage from the external resistors. By adjusting the resistor values, the desired output voltage can be obtained. The TL431BQDBZRQ1 continuously monitors the output voltage and adjusts its internal resistance to maintain a stable output.

Detailed Application Field Plans

The TL431BQDBZRQ1 finds applications in various electronic systems, including:

1. Power Supplies: It is used as a voltage reference in linear and switching power supplies to provide accurate regulation.
2. Battery Charging Systems: The TL431BQDBZRQ1 ensures precise voltage control during battery charging, preventing overcharging or undercharging.
3. Audio Amplifiers: It is employed in audio amplifiers to stabilize the biasing voltage and improve overall performance.
4. Voltage Monitors: The TL431BQDBZRQ1 is utilized in voltage monitoring circuits to trigger alarms or shutdown systems when the voltage exceeds a certain threshold.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL431BQDBZRQ1 include:

1. LM4040: A precision voltage reference with adjustable output and low temperature coefficient.
2. LT1236: A high-precision shunt regulator with a wide operating temperature range and low dynamic impedance.
3. REF3030: A low-power, high-precision voltage reference with adjustable output and excellent long-term stability.

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, the TL431BQDBZRQ1 is a highly accurate voltage reference used in various electronic circuits. Its adjustable output, low temperature coefficient, and small package size make it suitable for a wide range of applications. However, its limited output current capability and the need for external resistors for voltage adjustment should be taken into consideration during design.