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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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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng NJM79L12A trong giải pháp kỹ thuật
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.