SG7915K

Product Overview

• Category: Voltage Regulator
• Use: To regulate and stabilize the output voltage in electronic circuits
• Characteristics:
  • Provides a fixed negative voltage output
  • High precision and low dropout voltage
  • Thermal shutdown and short-circuit protection
• Package: TO-220 package
• Essence: Integrated circuit (IC)
• Packaging/Quantity: Available in reels or tubes, quantity varies depending on supplier

Specifications

• Input Voltage: Up to -35V
• Output Voltage: -15V
• Output Current: Up to 1A
• Dropout Voltage: Typically 2V
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The SG7915K voltage regulator has three pins:

1. Input Pin (VIN): Connects to the input voltage source.
2. Ground Pin (GND): Connected to the ground reference of the circuit.
3. Output Pin (VOUT): Provides the regulated -15V output.

Functional Features

• Voltage Regulation: Maintains a stable -15V output regardless of input voltage fluctuations.
• Thermal Shutdown: Protects the device from overheating by shutting down when the temperature exceeds a certain threshold.
• Short-Circuit Protection: Safeguards the circuit by limiting the current in case of a short circuit.

Advantages and Disadvantages

Advantages: - High precision and accuracy in voltage regulation - Low dropout voltage ensures efficient power conversion - Thermal shutdown and short-circuit protection enhance reliability

Disadvantages: - Requires external capacitors for stability - Limited output current capacity (up to 1A)

Working Principles

The SG7915K is a linear voltage regulator that uses a negative feedback mechanism to maintain a constant -15V output. It compares the output voltage with a reference voltage and adjusts the internal circuitry to ensure the desired output is achieved. The device operates by dissipating excess energy as heat, which is why it has a dropout voltage.

Detailed Application Field Plans

The SG7915K voltage regulator finds applications in various electronic circuits where a stable -15V supply is required. Some common application areas include:

1. Audio Amplifiers: Provides a regulated negative voltage for audio amplification circuits.
2. Industrial Control Systems: Used in control panels and power supplies for industrial automation.
3. Instrumentation: Ensures precise voltage levels in measurement and testing equipment.
4. Automotive Electronics: Used in automotive systems such as car audio, lighting, and sensors.

Detailed and Complete Alternative Models

• LM7915: Similar negative voltage regulator from Texas Instruments
• MC7915: Negative voltage regulator from ON Semiconductor
• L7915CV: Negative voltage regulator from STMicroelectronics

These alternative models offer similar functionality and can be used as substitutes for the SG7915K depending on availability and specific requirements.

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