TL432CPK

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Low dynamic output impedance - Wide operating voltage range - High accuracy and stability - Low temperature coefficient - Fast response time

Package: TO-92, SOT-23

Essence: The TL432CPK is a versatile integrated circuit that serves as an adjustable precision shunt regulator. It provides a stable reference voltage for various applications.

Packaging/Quantity: The TL432CPK is available in TO-92 and SOT-23 packages. It is typically sold in reels or tubes containing multiple units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Voltage Range: 2.5V to 36V
• Output Current: Up to 100mA
• Temperature Range: -40°C to +85°C
• Line Regulation: 0.04%/V
• Load Regulation: 0.4%/mA
• Dynamic Output Impedance: 0.2Ω

Detailed Pin Configuration

The TL432CPK has three pins:

1. Anode (A): Connected to the positive supply voltage.
2. Cathode (K): Connected to the load or ground.
3. Reference (REF): Provides the stable reference voltage.

Functional Features

• Adjustable Output Voltage: The TL432CPK allows precise adjustment of the output voltage by connecting external resistors.
• Voltage Reference: It provides a stable reference voltage for other components in the circuit.
• Shunt Regulation: The device regulates the voltage by shunting excess current to the ground.
• Low Dynamic Output Impedance: Ensures stability and accuracy of the output voltage even under varying load conditions.
• Wide Operating Voltage Range: Can be used in a wide range of applications with different supply voltages.

Advantages

• High accuracy and stability make it suitable for precision applications.
• Low temperature coefficient ensures minimal voltage drift over a wide temperature range.
• Fast response time allows quick regulation of the output voltage.
• Adjustable output voltage provides flexibility in various circuit designs.

Disadvantages

• Limited output current capability (up to 100mA) may not be sufficient for high-power applications.
• Requires external resistors for precise voltage adjustment, adding complexity to the circuit design.

Working Principles

The TL432CPK operates as a shunt regulator by comparing the reference voltage at the REF pin with the voltage across the external resistor network. It adjusts the shunting current through the cathode pin to maintain a stable output voltage. By adjusting the values of the external resistors, the desired output voltage can be set.

Detailed Application Field Plans

The TL432CPK finds applications in various fields, including:

1. Voltage References: Provides stable reference voltage for analog-to-digital converters, digital-to-analog converters, and other precision measurement circuits.
2. Power Supplies: Regulates the output voltage in power supply circuits, ensuring stable and accurate voltage levels.
3. Battery Charging: Controls the charging voltage in battery charging circuits, preventing overcharging and protecting the battery.
4. Audio Amplifiers: Stabilizes the bias voltage in audio amplifier circuits, improving performance and reducing distortion.
5. LED Drivers: Maintains a constant current for driving LEDs, ensuring consistent brightness and longevity.

Detailed and Complete Alternative Models

Some alternative models to the TL432CPK include:

1. LM431: Similar adjustable precision shunt regulator with slightly different specifications.
2. TLV431: Low-voltage version of the TL432CPK, suitable for applications with lower supply voltages.
3. LT1634: Precision voltage reference with higher accuracy and stability but without adjustable output voltage capability.

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

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