ON Semiconductor 4N28S Optocoupler

The ON Semiconductor 4N28S is a versatile and reliable optocoupler device designed to provide electrical isolation between its input and output. This component is a part of the 4N2X series, where "X" denotes various performance classes. The 4N28S, in particular, is a popular choice for applications that require signal isolation to protect sensitive electronics from high voltages or noisy environments.

Key Features:

• High Voltage Isolation: The 4N28S offers a high voltage isolation between input and output, typically rated at 5000Vrms, which makes it suitable for applications that involve direct coupling to the mains voltage or other high-voltage circuits.
• Phototransistor Output: The device includes a silicon NPN phototransistor, which is activated by the light emitted from an internal infrared LED, ensuring a reliable transfer of electrical signals across the isolation barrier.
• Industry Standard DIP Package: Housed in a standard 6-pin DIP package, the 4N28S is compatible with a wide range of circuit board layouts and is easy to integrate into existing designs.
• Current Transfer Ratio (CTR): The 4N28S provides a Current Transfer Ratio (CTR) that typically ranges from 20% to 300%, allowing for flexible design options depending on the required signal strength.
• Wide Operating Temperature Range: With an operating temperature range of -55°C to +100°C, the 4N28S is suitable for use in a variety of environmental conditions.

Applications:

The ON Semiconductor 4N28S optocoupler is commonly used in a broad spectrum of applications, including but not limited to:

• Isolation in power supply circuits
• Signal isolation in communication systems
• Interfacing microprocessors with high voltage systems
• Switching power supplies and motor control circuits
• Industrial controls and automation systems

With its robust design and reliable performance, the ON Semiconductor 4N28S optocoupler is an excellent choice for designers looking to enhance the safety and stability of their electronic systems.