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NJM78L12UA
Basic Information Overview
- Category: Integrated Circuit (IC)
- Use: Voltage Regulator
- Characteristics: Low Dropout, Fixed Output Voltage
- Package: TO-92
- Essence: Linear Regulator
- Packaging/Quantity: Bulk, 1000 pieces per reel
Specifications
- Input Voltage Range: 14V to 35V
- Output Voltage: 12V
- Output Current: 100mA
- Dropout Voltage: 2V (typical)
- Line Regulation: ±0.4% (typical)
- Load Regulation: ±0.5% (typical)
- Quiescent Current: 5mA (typical)
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
The NJM78L12UA has three pins: 1. Input (Vin): Connects to the input voltage source. 2. Ground (GND): Connected to the ground reference. 3. Output (Vout): Provides the regulated output voltage.
Functional Features
- Low dropout voltage: The NJM78L12UA can regulate the output voltage even when the input voltage is close to the desired output voltage.
- Fixed output voltage: The IC provides a stable output voltage of 12V.
- Overcurrent protection: The device includes internal current limiting to protect against excessive load currents.
- Thermal shutdown protection: In case of excessive temperature, the IC shuts down to prevent damage.
Advantages and Disadvantages
Advantages: - Compact and easy to use. - Stable output voltage. - Low dropout voltage. - Overcurrent and thermal protection.
Disadvantages: - Limited output current capacity (100mA). - Requires external capacitors for stability.
Working Principles
The NJM78L12UA is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the reference voltage with a fraction of the output voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.
Detailed Application Field Plans
The NJM78L12UA is commonly used in various electronic devices that require a regulated 12V power supply. Some typical applications include: - Battery-powered devices - Audio amplifiers - Industrial control systems - Automotive electronics - LED lighting
Detailed and Complete Alternative Models
- LM78L12: Similar specifications and pin configuration, available in different package options.
- MC78L12: Equivalent performance, available in TO-92 package.
- UA78L12: Comparable characteristics, offered in various package types.
Note: The above alternatives are just a few examples; there are several other models available from different manufacturers.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de NJM78L12UA en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of NJM78L12UA in technical solutions:
Q: What is NJM78L12UA? A: NJM78L12UA is a voltage regulator IC that provides a fixed output voltage of +12V.
Q: What is the input voltage range for NJM78L12UA? A: The input voltage range for NJM78L12UA is typically between +14V to +35V.
Q: What is the maximum output current of NJM78L12UA? A: The maximum output current of NJM78L12UA is 100mA.
Q: Can NJM78L12UA handle reverse polarity protection? A: No, NJM78L12UA does not have built-in reverse polarity protection. External protection measures should be taken.
Q: Is it possible to use NJM78L12UA as a step-down voltage regulator? A: No, NJM78L12UA is a fixed voltage regulator and cannot be used as a step-down regulator.
Q: How much power dissipation does NJM78L12UA require? A: NJM78L12UA requires a power dissipation of around 400mW.
Q: Can NJM78L12UA operate in high-temperature environments? A: Yes, NJM78L12UA has a maximum operating temperature of +125°C, making it suitable for high-temperature applications.
Q: Does NJM78L12UA require any external components for operation? A: Yes, NJM78L12UA requires input and output capacitors for stability and filtering purposes.
Q: Can NJM78L12UA be used in battery-powered applications? A: Yes, NJM78L12UA can be used in battery-powered applications as long as the input voltage is within the specified range.
Q: What are some typical applications of NJM78L12UA? A: NJM78L12UA is commonly used in various electronic devices such as audio amplifiers, sensors, and microcontrollers to provide a stable +12V power supply.
Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.