The TLP421F(4G) is a high-isolation voltage photocoupler manufactured by Toshiba Semiconductor and Storage. It consists of a gallium arsenide infrared emitting diode optically coupled to a phototransistor. It is designed for providing electrical isolation between circuits, protecting sensitive components from high voltages and noise. This photocoupler is commonly used in various applications, including programmable controllers, I/O interfaces for microcomputers, and general-purpose isolation circuits.

Applications

  
• Programmable Controllers
  
• I/O Interfaces for Microcomputers
  
• Noise Suppression in Switching Regulators
  
• Signal Transmission between Circuits with Different Ground Potentials
  
• General-Purpose Isolation Circuits

Features

  
• High Isolation Voltage: Provides a high level of electrical isolation between input and output.
  
• Compact Package: Small footprint for space-saving designs.
  
• High Current Transfer Ratio (CTR): Ensures efficient signal transfer.
  
• Low Input Current: Reduces power consumption.
  
• Pb-Free and RoHS Compliant: Environmentally friendly.

Benefits

  
• Enhanced Safety: Provides a high level of electrical isolation, protecting sensitive components.
  
• Noise Immunity: Reduces noise interference in signal transmission.
  
• Compact Design: Allows for smaller and more efficient circuit designs.
  
• Simplified Circuit Design: Simplifies the design of isolated circuits.
  
• Improved Reliability: Enhances the reliability of electronic systems.

Technical Specifications

The TLP421F(4G) features a high isolation voltage (typically 3750 Vrms). The forward current (IF) for the input diode is typically 20 mA, and the collector-emitter voltage (VCEO) for the output transistor is typically 80 V. The current transfer ratio (CTR) varies depending on the specific grade. It is available in a 4-pin DIP package. The operating temperature ranges from -55°C to +110°C. Key parameters include rise time, fall time, and saturation voltage.

The TLP421F(4G) is designed to provide reliable electrical isolation in a variety of electronic applications. Its high isolation voltage, compact package, and efficient signal transfer make it a versatile choice for protecting sensitive components and reducing noise in circuits.