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NJM79L12A
Product Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Regulator
- Characteristics: Low Dropout, Negative Voltage Regulator
- Package: TO-92 (Through-Hole)
- Essence: Linear Regulator IC
- Packaging/Quantity: Bulk Packaging, 100 pieces per pack
Specifications
- Input Voltage Range: -35V to -15V
- Output Voltage: -12V
- Output Current: 100mA
- Dropout Voltage: 1.2V (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The NJM79L12A has a standard three-pin configuration:
- Input Pin (VIN): Connects to the input voltage source.
- Ground Pin (GND): Connected to the ground reference.
- Output Pin (VOUT): Provides the regulated output voltage.
Functional Features
- Voltage Regulation: The NJM79L12A regulates the input voltage to a stable -12V output.
- Low Dropout: It operates with a low dropout voltage of 1.2V, allowing it to regulate even when the input voltage is close to the desired output voltage.
- Short Circuit Protection: The IC includes built-in protection against short circuits, preventing damage to the device.
- Thermal Shutdown: In case of excessive heat, the NJM79L12A shuts down to protect itself from thermal damage.
Advantages and Disadvantages
Advantages
- Simple and compact design
- Easy to use and integrate into various electronic circuits
- Reliable voltage regulation performance
- Cost-effective solution for negative voltage regulation
Disadvantages
- Limited output current capacity (100mA)
- Requires external capacitors for stability
- Not suitable for high-power applications
Working Principles
The NJM79L12A is a linear voltage regulator that utilizes a negative feedback mechanism to maintain a stable output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry to regulate the output voltage at -12V, regardless of variations in the input voltage or load conditions.
Detailed Application Field Plans
The NJM79L12A finds applications in various electronic systems where a stable -12V voltage supply is required. Some common application fields include:
- Audio Amplifiers: Provides a regulated negative voltage supply for audio amplification circuits.
- Instrumentation: Used in measurement and control systems that require a negative voltage reference.
- Automotive Electronics: Suitable for automotive applications requiring a reliable negative voltage source.
- Battery-Powered Devices: Can be used in portable devices that need a regulated negative voltage.
Detailed and Complete Alternative Models
- LM79L12: Similar negative voltage regulator IC manufactured by Texas Instruments.
- MC79L12: Negative voltage regulator IC produced by ON Semiconductor.
- UA79L12: Another alternative from Fairchild Semiconductor.
These alternative models offer similar functionality and characteristics to the NJM79L12A and can be used as replacements depending on availability and specific requirements.
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Liste 10 perguntas e respostas comuns relacionadas à aplicação de NJM79L12A em soluções técnicas
Sure! Here are 10 common questions and answers related to the application of NJM79L12A in technical solutions:
Q: What is NJM79L12A? A: NJM79L12A is a voltage regulator IC that provides a fixed output voltage of -12V.
Q: What is the input voltage range for NJM79L12A? A: The input voltage range for NJM79L12A is typically between -35V to -15V.
Q: What is the maximum output current of NJM79L12A? A: The maximum output current of NJM79L12A is 100mA.
Q: Can NJM79L12A be used as a positive voltage regulator? A: No, NJM79L12A is specifically designed as a negative voltage regulator.
Q: What are the typical applications of NJM79L12A? A: NJM79L12A is commonly used in various electronic devices where a stable -12V power supply is required, such as audio amplifiers, industrial control systems, and instrumentation.
Q: How does NJM79L12A regulate the output voltage? A: NJM79L12A uses an internal voltage reference and feedback mechanism to maintain a constant -12V output voltage regardless of changes in input voltage or load conditions.
Q: Is it necessary to use external capacitors with NJM79L12A? A: Yes, it is recommended to use input and output capacitors to stabilize the regulator's performance and reduce noise.
Q: What is the thermal shutdown feature of NJM79L12A? A: NJM79L12A has built-in thermal shutdown protection that automatically shuts down the regulator if it exceeds a certain temperature, preventing damage to the IC.
Q: Can NJM79L12A handle short-circuit conditions? A: Yes, NJM79L12A has built-in current limiting and short-circuit protection features to protect itself from excessive current flow during short-circuit conditions.
Q: What is the package type of NJM79L12A? A: NJM79L12A is available in various package types, including TO-92, SOT-89, and DPAK, providing flexibility for different application requirements.
Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for NJM79L12A.