規格
| 屬性 | 價值 |
| Package | Tube |
| ProductStatus | Obsolete |
| OutputConfiguration | Positive |
| OutputType | Fixed |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 35V |
| Voltage-Output(Min/Fixed) | 12V |
| VoltageDropout(Max) | 2V @ 1A (Typ) |
| Current-Output | 1A |
| Current-Quiescent(Iq) | 8 mA |
| PSRR | 71dB (120Hz) |
| ProtectionFeatures | Over Temperature, Short Circuit |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Through Hole |
| Package/Case | TO-220-3 |
概述
Description
The LM7812CT is a popular fixed-voltage linear voltage regulator integrated circuit. It is part of the 78xx series, specifically designed to provide a stable 12V output from a higher input voltage, typically ranging from 14.5V to 35V. The device is capable of delivering up to 1.5A of output current, making it suitable for medium power applications.
Key features include internal thermal overload protection, short circuit protection, and safe area compensation, ensuring reliability and preventing damage under harsh operating conditions. The LM7812CT has three pins: input, output, and ground. It comes in a TO-220 package, which aids in heat dissipation and can be mounted to a heat sink for enhanced thermal performance.
Common applications include power supply circuits for various electronic devices, such as microcontrollers, sensors, and other digital or analog circuits requiring a consistent 12V supply. Its ease of use and reliability make it a staple component in both hobbyist and professional electronics projects.
Key features include internal thermal overload protection, short circuit protection, and safe area compensation, ensuring reliability and preventing damage under harsh operating conditions. The LM7812CT has three pins: input, output, and ground. It comes in a TO-220 package, which aids in heat dissipation and can be mounted to a heat sink for enhanced thermal performance.
Common applications include power supply circuits for various electronic devices, such as microcontrollers, sensors, and other digital or analog circuits requiring a consistent 12V supply. Its ease of use and reliability make it a staple component in both hobbyist and professional electronics projects.
Equivalent
The LM7812CT is a voltage regulator providing a fixed 12V output, and its equivalent products include:
- UA7812 (Texas Instruments)
- L7812 (STMicroelectronics)
- MC7812 (ON Semiconductor)
- KA7812 (Fairchild Semiconductor)
- NTE956 (NTE Electronics)
These equivalents have similar specifications and pin configurations, typically used in power supply applications for providing stable 12V DC output. Always check specific datasheets to ensure compatibility.
- UA7812 (Texas Instruments)
- L7812 (STMicroelectronics)
- MC7812 (ON Semiconductor)
- KA7812 (Fairchild Semiconductor)
- NTE956 (NTE Electronics)
These equivalents have similar specifications and pin configurations, typically used in power supply applications for providing stable 12V DC output. Always check specific datasheets to ensure compatibility.
Features
The LM7812CT is a voltage regulator that delivers a fixed output voltage of 12V. Key features include:
1. Output Voltage: Provides a stable 12V output with a tolerance of ±5%.
2. Output Current: Can supply up to 1.5A of current.
3. Input Voltage Range: Supports input voltages from 14.5V to 35V.
4. Thermal Protection: Equipped with thermal overload protection to prevent overheating.
5. Short-Circuit Protection: Includes internal current limiting for protection against short circuits.
6. Safe Operating Area Protection: Ensures reliable operation over a range of conditions.
7. Dropout Voltage: Typically around 2V, indicating the minimum difference between input and output voltage for proper regulation.
8. Package: Commonly available in a TO-220 package, which aids in heat dissipation.
9. Applications: Suitable for various applications, including power supply units, battery chargers, and as a component in various electronic circuits requiring a stable 12V output.
These features make the LM7812CT a versatile and reliable choice for voltage regulation in electronic designs.
1. Output Voltage: Provides a stable 12V output with a tolerance of ±5%.
2. Output Current: Can supply up to 1.5A of current.
3. Input Voltage Range: Supports input voltages from 14.5V to 35V.
4. Thermal Protection: Equipped with thermal overload protection to prevent overheating.
5. Short-Circuit Protection: Includes internal current limiting for protection against short circuits.
6. Safe Operating Area Protection: Ensures reliable operation over a range of conditions.
7. Dropout Voltage: Typically around 2V, indicating the minimum difference between input and output voltage for proper regulation.
8. Package: Commonly available in a TO-220 package, which aids in heat dissipation.
9. Applications: Suitable for various applications, including power supply units, battery chargers, and as a component in various electronic circuits requiring a stable 12V output.
These features make the LM7812CT a versatile and reliable choice for voltage regulation in electronic designs.
Pinout
The LM7812CT is a three-terminal linear voltage regulator with a fixed output voltage. It is part of the 78xx series of voltage regulators, which provide a stable and regulated output voltage from a higher voltage input. The "12" in its name indicates that it provides a +12V output.
Pin Count and Functions:
1. Input (Pin 1): This pin receives the unregulated input voltage, which must be higher than 12V to ensure proper regulation (typically at least 14V to 35V).
2. Ground (Pin 2): This is the common ground pin for both the input and output, serving as a reference point for the input and output voltages.
3. Output (Pin 3): This pin provides the regulated +12V output voltage.
The LM7812CT is commonly used in various applications requiring a stable +12V power supply, such as in power supply circuits, electronic projects, and consumer electronics. It also includes built-in protection against overheating and overcurrent.
Pin Count and Functions:
1. Input (Pin 1): This pin receives the unregulated input voltage, which must be higher than 12V to ensure proper regulation (typically at least 14V to 35V).
2. Ground (Pin 2): This is the common ground pin for both the input and output, serving as a reference point for the input and output voltages.
3. Output (Pin 3): This pin provides the regulated +12V output voltage.
The LM7812CT is commonly used in various applications requiring a stable +12V power supply, such as in power supply circuits, electronic projects, and consumer electronics. It also includes built-in protection against overheating and overcurrent.
Manufacturer
The LM7812CT is a voltage regulator manufactured by several companies, including Texas Instruments, STMicroelectronics, ON Semiconductor, and others. These companies are major players in the semiconductor industry, each with a strong presence in designing and manufacturing electronic components.
1. Texas Instruments (TI): TI is a global semiconductor company based in the United States, known for its extensive range of analog and embedded processing products.
2. STMicroelectronics (ST): ST is a multinational electronics and semiconductor manufacturer headquartered in Switzerland. It serves a broad range of markets, including automotive, industrial, and personal electronics.
3. ON Semiconductor: Now known as onsemi, this U.S.-headquartered company focuses on energy-efficient innovations, supplying a wide array of semiconductor solutions, including power management and sensing.
These companies are integral to the electronics supply chain, providing essential components for various consumer, industrial, and automotive applications. The LM7812CT, specifically, is a standard 12V voltage regulator used in various circuits to maintain a stable output voltage, despite variations in input voltage or load conditions.
1. Texas Instruments (TI): TI is a global semiconductor company based in the United States, known for its extensive range of analog and embedded processing products.
2. STMicroelectronics (ST): ST is a multinational electronics and semiconductor manufacturer headquartered in Switzerland. It serves a broad range of markets, including automotive, industrial, and personal electronics.
3. ON Semiconductor: Now known as onsemi, this U.S.-headquartered company focuses on energy-efficient innovations, supplying a wide array of semiconductor solutions, including power management and sensing.
These companies are integral to the electronics supply chain, providing essential components for various consumer, industrial, and automotive applications. The LM7812CT, specifically, is a standard 12V voltage regulator used in various circuits to maintain a stable output voltage, despite variations in input voltage or load conditions.
Application
The LM7812CT is a voltage regulator that provides a stable 12V output from a higher voltage input. It is commonly used in various applications, including:
1. Power Supplies: Provides a regulated 12V output for electronic devices and circuits.
2. Battery Chargers: Maintains a constant voltage level for charging batteries safely.
3. Embedded Systems: Powers microcontrollers and other components requiring stable voltage.
4. Audio Equipment: Ensures consistent voltage for audio amplifiers and other audio circuits.
5. DIY Projects: Utilized by hobbyists for various electronic projects needing a 12V supply.
6. Telecommunications Equipment: Provides regulated power to communication devices.
Its ease of use and reliability make it popular in both commercial and hobbyist applications.
1. Power Supplies: Provides a regulated 12V output for electronic devices and circuits.
2. Battery Chargers: Maintains a constant voltage level for charging batteries safely.
3. Embedded Systems: Powers microcontrollers and other components requiring stable voltage.
4. Audio Equipment: Ensures consistent voltage for audio amplifiers and other audio circuits.
5. DIY Projects: Utilized by hobbyists for various electronic projects needing a 12V supply.
6. Telecommunications Equipment: Provides regulated power to communication devices.
Its ease of use and reliability make it popular in both commercial and hobbyist applications.
Package
The LM7812CT is a voltage regulator with a TO-220 package type. It provides a stable 12V output and can deliver up to 1.5A of current. The TO-220 package allows for easy mounting and efficient heat dissipation.
