LM7824 Pinout, Equivalent, Application, Datasheet

This article provides a complete and easy-to-understand guide to the LM7824 voltage regulator, covering its features, specifications, working principle, applications, and alternatives. It also explains the LM7824 pinout in detail, helping engineers, hobbyists, and students integrate the device confidently into regulated +24V power supply circuits.

Introduction

The LM7824 is a fixed-output positive voltage regulator that supplies a stable +24V DC with up to 1.5A output current. It belongs to the well-known 78xx series of linear voltage regulators widely used in power supplies, instrumentation systems, automation circuits, and protection-critical applications.
The IC is designed for excellent regulation, low noise, and reliable thermal performance, making it suitable for both commercial and industrial electronic systems where a clean +24V rail is required.

Pin Configuration / Pinout of LM7824 Power Amplifier IC

Understanding the LM7824 Pinout Configuration

The LM7824 is packaged in the TO-220 3-terminal configuration, making it easy to mount on PCBs and heatsinks. Correct understanding of the pinout ensures proper voltage regulation and prevents reverse connections.

Pinout (Front View, Pins Down):

1. Input (VIN) – Connects to unregulated positive DC supply
2. Ground (GND) – Common return path
3. Output (VOUT) – Provides regulated +24V output

The LM7824 pinout arrangement ensures stable operation when paired with recommended external capacitors.

Note: DATASHEET DOWNLOAD button is provided end of this article.

LM7824 Key Features

• Fixed +24V regulated output
• High output current capability
• Internal thermal shutdown
• Built-in short-circuit protection
• Safe-area overload protection
• Low ripple and noise
• Excellent line and load regulation

LM7824 Specifications/Characteristics

• Output voltage: +24V regulated
• Maximum output current: 1.5A
• Input voltage range: up to +40V
• Dropout voltage: depends on load
• Maximum power dissipation: based on heatsink
• Junction temperature (TJ): 0°C to +125°C
• Storage temperature (Tstg): –55°C to +150°C
• Package type: TO-220 3-terminal

Key Applications of LM7824 Power Amplifier IC

• Regulated +24V power supply circuits
• Industrial control and automation equipment
• Test and measurement devices
• Motor driver control systems
• Sensors and instrumentation
• Telecommunication equipment
• Embedded systems requiring clean +24V rails

LM7824 Equivalent ICs / Alternatives

(Verify pin compatibility before using substitutions)

• MC7824
• KA7824
• L7824CV
• UA7824
• Any fixed +24V linear regulator with 1A–1.5A capability

More Circuit Layouts

Working Principle of LM7824

The LM7824 operates as a linear voltage regulator, using an internal reference voltage and error amplifier to maintain a constant +24V output. Any variations in the input voltage or load current are sensed internally, and the pass transistor adjusts its conduction to keep the output voltage stable.
Thermal shutdown, current limiting, and safe-area protection protect the IC from overheating, excessive current, and load faults. Proper input and output capacitors ensure noise-free, stable operation.

Frequently Asked Questions (FAQ)

Q1: What is the output voltage of LM7824?
It outputs a regulated +24V DC.

Q2: What input voltage is required for LM7824?
Typically between +27V and +40V for proper regulation.

Q3: Does LM7824 require heatsinking?
Yes, especially for higher loads or large input-to-output voltage differences.

Q4: What capacitors are recommended?
Usually 0.33µF on input and 0.1–1µF on output for stability.

Conclusion

The LM7824 is a reliable and robust +24V fixed voltage regulator suitable for industrial, commercial, and embedded power supply designs. With built-in protection, dependable operation, and easy-to-use pinout configuration, it is an excellent choice for applications requiring clean and stable +24V output. Understanding its specifications and working principles helps ensure optimal performance in any circuit.

Datasheet of LM7824 Power Amplifier IC

Click the following Button below to download the datasheet of LM7824 :

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