BA78M18CP-E2

Product Overview

Category

The BA78M18CP-E2 belongs to the category of voltage regulators.

Use

This product is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 20V to 35V
• Output Voltage: 18V
• Maximum Output Current: 1A
• Dropout Voltage: 2V
• Operating Temperature Range: -40°C to +125°C
• Package Type: TO-220
• Mounting Style: Through Hole

Package and Quantity

The BA78M18CP-E2 is available in a TO-220 package. It is typically sold in packs of 10 units.

Specifications

• Input Voltage Range: 20V to 35V
• Output Voltage: 18V
• Output Current: 1A
• Dropout Voltage: 2V
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Ripple Rejection Ratio: 60dB (typical)
• Quiescent Current: 5mA (typical)
• Thermal Shutdown Protection: Yes
• Short Circuit Protection: Yes

Pin Configuration

The BA78M18CP-E2 has three pins:

1. Input Pin (VIN): This pin is used to connect the input voltage.
2. Ground Pin (GND): This pin is connected to the ground reference.
3. Output Pin (VOUT): The regulated output voltage is obtained from this pin.

Functional Features

• Voltage Regulation: The BA78M18CP-E2 provides a stable output voltage of 18V, regardless of variations in the input voltage.
• Thermal Shutdown Protection: In case of excessive temperature, the regulator shuts down to prevent damage.
• Short Circuit Protection: The device automatically shuts down in the event of a short circuit, protecting the circuitry.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for flexibility in various applications.
• High ripple rejection ratio ensures a clean output signal.
• Thermal shutdown and short circuit protection enhance reliability and safety.

Disadvantages

• Dropout voltage of 2V may limit its use in low voltage applications.
• Quiescent current of 5mA may be relatively high for power-sensitive designs.

Working Principles

The BA78M18CP-E2 is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Application Field Plans

The BA78M18CP-E2 can be used in various applications, including: 1. Power supply circuits for electronic devices. 2. Automotive electronics. 3. Industrial control systems. 4. Audio amplifiers. 5. Battery charging circuits.

Alternative Models

1. LM7818: This is a popular alternative from Texas Instruments with similar specifications.
2. MC78M18: Another alternative from ON Semiconductor offering comparable performance.
3. L78M18CV: A voltage regulator from STMicroelectronics that can be used as an alternative.

These alternative models provide similar functionality and can be considered as replacements for the BA78M18CP-E2.

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