LM238K

Product Overview

Category: Integrated Circuit (IC)

Use: LM238K is a voltage regulator IC primarily used for regulating and stabilizing the output voltage in electronic circuits.

Characteristics: - High precision voltage regulation - Low dropout voltage - Wide input voltage range - Thermal shutdown protection - Short-circuit current limiting

Package: LM238K is available in a TO-220 package, which provides excellent thermal dissipation capabilities.

Essence: The essence of LM238K lies in its ability to maintain a stable output voltage despite fluctuations in the input voltage.

Packaging/Quantity: LM238K is typically sold in reels or tubes containing 50 units per package.

Specifications

Input Voltage Range: 4.5V to 40V
Output Voltage Range: 1.25V to 37V
Dropout Voltage: 0.5V (typical)
Output Current: Up to 3A
Quiescent Current: 10mA (typical)
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LM238K features a standard three-pin configuration:

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

Functional Features

Voltage Regulation: LM238K ensures a constant output voltage regardless of variations in the input voltage.
Thermal Shutdown Protection: The IC incorporates a built-in thermal shutdown mechanism to prevent overheating.
Short-Circuit Current Limiting: LM238K limits the output current in case of a short circuit, protecting the circuitry.
Low Dropout Voltage: The IC exhibits a low dropout voltage, minimizing power dissipation.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Wide input voltage range - Excellent thermal dissipation capabilities - Short-circuit current limiting for circuit protection

Disadvantages: - Relatively high quiescent current compared to some alternative models - Limited output current capacity (up to 3A)

Working Principles

LM238K 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 stable output voltage. This is achieved by controlling the pass transistor, which regulates the flow of current through the IC.

Detailed Application Field Plans

LM238K finds applications in various electronic devices and systems, including: 1. Power supplies 2. Battery chargers 3. Automotive electronics 4. Industrial control systems 5. Audio amplifiers

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LM238K are: 1. LM317: A popular adjustable voltage regulator IC with a wide input voltage range. 2. LM7805: A fixed 5V voltage regulator IC commonly used in low-power applications. 3. LT1083: A high-current adjustable voltage regulator IC suitable for demanding applications.

These alternative models can be considered based on specific requirements and constraints.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM238K v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LM238K in technical solutions:

Q: What is LM238K? A: LM238K is a voltage regulator integrated circuit (IC) manufactured by Texas Instruments.
Q: What is the input voltage range for LM238K? A: The input voltage range for LM238K is typically between 4.5V and 40V.
Q: What is the output voltage range for LM238K? A: The output voltage range for LM238K can be adjusted from 1.25V to 37V using external resistors.
Q: What is the maximum output current of LM238K? A: LM238K can provide a maximum output current of up to 1.5A.
Q: What is the purpose of LM238K in technical solutions? A: LM238K is commonly used as a voltage regulator to provide stable and regulated power supply to various electronic components or circuits.
Q: Can LM238K handle high temperatures? A: Yes, LM238K has a wide operating temperature range of -40°C to +125°C, making it suitable for applications in harsh environments.
Q: Does LM238K require any external components for operation? A: Yes, LM238K requires a few external components such as capacitors and resistors for stability and proper functioning.
Q: Is LM238K protected against overcurrent and thermal overload? A: Yes, LM238K includes built-in protection features like thermal shutdown and current limit to safeguard against overcurrent and excessive heat.
Q: Can LM238K be used in battery-powered applications? A: Yes, LM238K can be used in battery-powered applications as it has a low quiescent current and supports low dropout voltage operation.
Q: Are there any application notes or reference designs available for LM238K? A: Yes, Texas Instruments provides application notes and reference designs that offer guidance on using LM238K in various technical solutions.

Please note that the answers provided here are general and may vary depending on specific use cases and requirements.