SG7812T

Product Overview

Category

SG7812T belongs to the category of voltage regulators.

Use

It is primarily used for regulating and stabilizing voltage in electronic circuits.

Characteristics

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Maximum Output Current: 1.5A
• Dropout Voltage: 2V
• Operating Temperature Range: -40°C to +125°C

Package

SG7812T comes in a TO-220 package, which is a widely used through-hole package for power semiconductors.

Essence

The essence of SG7812T lies in its ability to provide a stable and regulated output voltage of 12V, regardless of input voltage fluctuations.

Packaging/Quantity

SG7812T is typically available in reels or tubes, with quantities varying depending on the supplier.

Specifications

• Input Voltage Range: 14V to 35V
• Output Voltage: 12V
• Output Current: 1.5A
• Dropout Voltage: 2V
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Ripple Rejection Ratio: 70dB
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-220
• Manufacturer: [Insert Manufacturer Name]

Detailed Pin Configuration

SG7812T has three pins:

1. Vin (Pin 1): This pin is used for connecting the input voltage.
2. GND (Pin 2): This pin is connected to the ground reference.
3. Vout (Pin 3): The regulated output voltage of 12V is obtained from this pin.

Functional Features

• Voltage Regulation: SG7812T ensures a constant output voltage of 12V, even when the input voltage varies.
• Overcurrent Protection: It incorporates overcurrent protection to safeguard the circuit from excessive current flow.
• Thermal Shutdown: The device includes a thermal shutdown feature that protects it from overheating.

Advantages and Disadvantages

Advantages

• Stable Output: SG7812T provides a stable output voltage, ensuring reliable performance of electronic circuits.
• Wide Input Voltage Range: It can accept input voltages ranging from 14V to 35V, making it suitable for various applications.
• Overcurrent Protection: The built-in overcurrent protection prevents damage to the circuit in case of excessive current flow.

Disadvantages

• Dropout Voltage: SG7812T has a dropout voltage of 2V, which means the input voltage must be at least 2V higher than the desired output voltage.

Working Principles

SG7812T operates on the principle of linear voltage regulation. It uses a series pass transistor to regulate the output voltage. When the input voltage exceeds the desired output voltage, the excess voltage is dissipated as heat. This heat dissipation is managed by the thermal shutdown feature to prevent damage to the device.

Detailed Application Field Plans

SG7812T finds applications in various fields, including:

1. Power Supply Units: It is commonly used in power supply units to provide a regulated 12V output for powering electronic devices.
2. Automotive Electronics: SG7812T is utilized in automotive electronics to stabilize voltage for components such as sensors, actuators, and control modules.
3. Industrial Automation: It is employed in industrial automation systems to ensure stable voltage supply for control circuits and sensors.
4. Telecommunications: SG7812T is used in telecommunications equipment to regulate voltage for reliable operation of communication modules.

Detailed and Complete Alternative Models

Some alternative models to SG7812T include:

1. LM7812: Manufactured by Texas Instruments, LM7812 is a widely used 12V voltage regulator with similar specifications.
2. MC7812: Produced by ON Semiconductor, MC7812 is another alternative that provides stable 12V output voltage.
3. UA7812: Manufactured by Fairchild Semiconductor, UA7812 is a popular choice for regulating voltage to 12V in electronic circuits.

These alternative models offer similar functionality and can be used as substitutes for SG7812T depending on availability and specific requirements.

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