The LR8N8 is a high voltage linear regulator manufactured by Supertex, Inc. It is designed to provide a stable and regulated output voltage from a high voltage input. The device is particularly well-suited for applications where a simple and cost-effective high voltage regulation solution is required.

Applications:

• High voltage linear regulators: Provides a regulated output voltage from a high voltage source.
• Off-line power supplies: Can be used in simple off-line power supply designs.
• LED lighting: Powers LEDs in lighting applications where high voltage input is present.
• HV Post Regulators: Suitable for use as a high voltage post regulator.

Features:

• High voltage input: Operates with a high voltage input, up to 450V.
• Adjustable output voltage: The output voltage can be adjusted using external resistors.
• Low quiescent current: Minimizes power consumption when the regulator is not actively loaded.
• Thermal shutdown protection: Protects the device from overheating.
• Current limiting: Limits the output current to prevent damage from overloads.

Benefits:

• Simple and cost-effective: Requires few external components, reducing the overall cost of the solution.
• High voltage operation: Operates directly from high voltage sources, eliminating the need for additional voltage reduction circuitry.
• Robust protection: Built-in protection features ensure reliable operation and prevent damage from overloads and overheating.
• Adjustable output voltage: Flexibility to set the output voltage to the desired level.

Additional Details:

The LR8N8 is a three-terminal linear regulator, making it easy to implement in a variety of circuits. It is capable of providing a stable output voltage while handling high input voltages. The adjustable output voltage feature is implemented through the use of external resistors to create a voltage divider. Its internal thermal shutdown and current limiting features protect the device in the event of fault conditions. The LR8N8 provides a simple and effective solution for high voltage regulation in applications such as off-line power supplies and LED lighting.