L4947H

Product Overview

Category

L4947H belongs to the category of voltage regulators.

Use

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

Characteristics

• High precision voltage regulation
• Low dropout voltage
• Wide input voltage range
• Thermal shutdown protection
• Short-circuit protection

Package

L4947H is available in a compact and durable package, suitable for various applications.

Essence

The essence of L4947H lies in its ability to provide stable and regulated voltage output, ensuring reliable performance of electronic devices.

Packaging/Quantity

The product is typically packaged in reels or tubes, with varying quantities depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 2.5V to 18V
• Output Voltage Range: 1.2V to 16V
• Dropout Voltage: 0.4V (typical)
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

L4947H features a standard pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VOUT: Output voltage pin
4. BYPASS: Bypass capacitor connection pin
5. ADJ: Adjustable voltage pin

Functional Features

• High Precision Regulation: L4947H ensures accurate and stable voltage regulation, minimizing fluctuations and ensuring optimal performance of connected devices.
• Low Dropout Voltage: The low dropout voltage feature allows the regulator to operate efficiently even when the input voltage is close to the desired output voltage.
• Wide Input Voltage Range: The wide input voltage range makes L4947H suitable for a variety of applications, accommodating different power supply sources.
• Thermal Shutdown Protection: The built-in thermal shutdown protection prevents the regulator from overheating, ensuring its longevity and reliability.
• Short-Circuit Protection: L4947H incorporates short-circuit protection, safeguarding the circuit from damage in case of a short-circuit condition.

Advantages and Disadvantages

Advantages

• High precision voltage regulation ensures stable performance of electronic devices.
• Low dropout voltage allows efficient operation even with low input voltages.
• Wide input voltage range makes it versatile for various applications.
• Thermal shutdown and short-circuit protection enhance safety and reliability.

Disadvantages

• Limited maximum output current (1A) may not be suitable for high-power applications.
• Requires external bypass capacitors for optimal performance.

Working Principles

L4947H operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a constant output voltage despite variations in the input voltage or load conditions. The regulator continuously monitors the output voltage and adjusts the current flow accordingly to ensure stability.

Detailed Application Field Plans

L4947H finds applications in various fields, including but not limited to: - Consumer electronics - Automotive electronics - Industrial automation - Telecommunications - Power management systems

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to L4947H are: - LM317 - LT1083 - LM7805 - LM1117

These models offer similar functionality and can be used as substitutes depending on specific requirements and design constraints.

In conclusion, L4947H is a voltage regulator known for its high precision, low dropout voltage, and wide input voltage range. It provides reliable voltage regulation for various electronic applications. While it has certain limitations, such as limited maximum output current, it offers several advantages like thermal shutdown and short-circuit protection. Its working principle involves feedback control to maintain a constant output voltage. L4947H finds applications in diverse fields, and alternative models like LM317 and LT1083 can be considered based on specific needs.