ON Semiconductor
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KA7912TSTU
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KA7912TSTU

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics:
    • Regulates input voltage to a fixed output voltage of -12V
    • Designed for use in various electronic devices
  • Package: TO-220
  • Essence: Reliable and efficient voltage regulation
  • Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer

Specifications

  • Input Voltage: Up to 35V
  • Output Voltage: -12V
  • Output Current: Up to 1A
  • Operating Temperature: -40°C to +125°C
  • Package Type: TO-220
  • Pin Count: 3

Detailed Pin Configuration

The KA7912TSTU has 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 -12V output.

Functional Features

  • Voltage Regulation: The KA7912TSTU ensures a stable -12V output voltage regardless of input variations.
  • Overcurrent Protection: Incorporates overcurrent protection to safeguard connected devices.
  • Thermal Shutdown: Includes thermal shutdown feature to prevent overheating.
  • Short Circuit Protection: Protects against short circuits, preventing damage to the IC.

Advantages and Disadvantages

Advantages: - Reliable voltage regulation - Overcurrent and short circuit protection - Thermal shutdown feature ensures safe operation

Disadvantages: - Limited output current capacity (up to 1A) - Requires external components for proper operation

Working Principles

The KA7912TSTU is a linear voltage regulator that uses a negative feedback mechanism to maintain a constant -12V output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry to regulate the output. The regulator dissipates excess voltage as heat, which is why it may require additional cooling measures in high-power applications.

Detailed Application Field Plans

The KA7912TSTU finds application in various electronic devices where a stable -12V voltage supply is required. Some common application fields include:

  1. Audio Equipment: Used in audio amplifiers, mixers, and preamplifiers.
  2. Industrial Control Systems: Employed in control panels, motor drives, and power supplies.
  3. Automotive Electronics: Utilized in automotive audio systems, lighting controls, and instrumentation.
  4. Telecommunications: Found in telecommunication equipment such as routers, switches, and base stations.

Detailed and Complete Alternative Models

  • LM7912: Similar voltage regulator IC from Texas Instruments.
  • MC7912: Voltage regulator IC manufactured by ON Semiconductor.
  • L7912CV: Negative voltage regulator IC from STMicroelectronics.

(Note: This list is not exhaustive and there are other alternative models available in the market.)

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van KA7912TSTU in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of KA7912TSTU in technical solutions:

  1. Q: What is KA7912TSTU? A: KA7912TSTU is a voltage regulator IC that provides a fixed output voltage of -12V.

  2. Q: What are the typical applications of KA7912TSTU? A: KA7912TSTU is commonly used in various electronic devices and circuits where a stable -12V power supply is required.

  3. Q: How does KA7912TSTU regulate the output voltage? A: KA7912TSTU uses an internal voltage reference and feedback mechanism to maintain a constant -12V output voltage, regardless of input voltage variations.

  4. Q: What is the maximum input voltage for KA7912TSTU? A: The maximum input voltage for KA7912TSTU is typically around -35V.

  5. Q: Can KA7912TSTU handle high current loads? A: Yes, KA7912TSTU can handle currents up to 1A, making it suitable for many low to medium power applications.

  6. Q: Is KA7912TSTU polarity sensitive? A: Yes, KA7912TSTU is polarity sensitive. The input pin (VIN) should be connected to the higher voltage, while the output pin (VOUT) provides the regulated -12V.

  7. Q: Does KA7912TSTU require any external components for operation? A: Yes, KA7912TSTU requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.

  8. Q: Can I use KA7912TSTU in automotive applications? A: No, KA7912TSTU is not specifically designed for automotive applications. It is recommended to use ICs specifically rated for automotive environments.

  9. Q: What are the thermal considerations for KA7912TSTU? A: KA7912TSTU has a built-in thermal shutdown feature that protects it from overheating. However, it is still important to provide adequate heat sinking if operating at high currents or in high ambient temperatures.

  10. Q: Are there any alternatives to KA7912TSTU for -12V voltage regulation? A: Yes, there are other voltage regulator ICs available in the market that can provide a fixed -12V output. Some popular alternatives include LM7912 and L7912.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer recommendations for KA7912TSTU.