KA337TU

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High precision - Low dropout voltage - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: TO-220

Essence: The KA337TU is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: The KA337TU is typically sold in reels or tubes containing 50 units per package.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.2V to 37V
• Dropout Voltage: 1.5V (typical)
• Output Current: Up to 1.5A
• Quiescent Current: 10mA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The KA337TU has a standard TO-220 package with three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference.
3. Output Pin (VOUT): Provides the regulated output voltage.

Functional Features

• High Precision: The KA337TU offers excellent voltage regulation accuracy, ensuring a stable output voltage even under varying load conditions.
• Low Dropout Voltage: With a low dropout voltage of only 1.5V, the KA337TU can regulate the output voltage efficiently, minimizing power dissipation.
• Adjustable Output Voltage: The output voltage can be easily adjusted using external resistors, allowing flexibility in meeting specific application requirements.
• Overcurrent Protection: The IC incorporates overcurrent protection circuitry, safeguarding the connected devices from excessive current flow.
• Thermal Shutdown Protection: To prevent overheating, the KA337TU features a thermal shutdown mechanism that shuts down the regulator if the temperature exceeds a safe limit.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage for efficient operation - Adjustable output voltage for flexibility - Overcurrent and thermal protection for device safety

Disadvantages: - Limited maximum output current (up to 1.5A) - Requires external components for voltage adjustment

Working Principles

The KA337TU operates as a linear voltage regulator. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage. The internal circuitry ensures that the output voltage remains within the specified range, compensating for load variations and input voltage changes.

Detailed Application Field Plans

The KA337TU finds applications in various electronic devices where a stable and regulated power supply is required. Some common application fields include:

1. Consumer Electronics: Used in televisions, audio systems, and gaming consoles to provide regulated power to different components.
2. Automotive Electronics: Employed in automotive systems such as infotainment systems, lighting controls, and engine management units.
3. Industrial Equipment: Integrated into industrial machinery, control systems, and automation equipment to ensure reliable and stable power supply.
4. Communications Systems: Utilized in telecommunications equipment, routers, and network switches to maintain consistent power delivery.

Detailed and Complete Alternative Models

1. LM317: A popular adjustable voltage regulator IC with similar characteristics and pin configuration.
2. LT1083: A high-current, adjustable linear regulator suitable for demanding applications.
3. LM7805: A fixed-output voltage regulator providing a stable 5V output for various electronic circuits.

These alternative models offer similar functionality and can be considered based on specific requirements and availability.

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