TLP290-4 Toshiba Transistor Output Optocoupler SMD Package

TLP290-4 Toshiba Transistor Output Optocoupler SMD Package 

The TLP290-4 is a highly compact and efficient quad-channel optocoupler developed by Toshiba, designed to provide robust isolation and reliable signal transfer between circuits that operate at different voltage levels.
It integrates four infrared LEDs and four high-gain phototransistor outputs inside a single, space-saving SMD package, making it ideal for dense PCB layouts used in modern electronic designs.

This device offers excellent galvanic isolation, typically rated at 3750 Vrms, which helps protect sensitive low-voltage control circuitry from high-voltage spikes, ground loops, and electrical noise. The optocoupler’s low input forward current requirement allows it to operate efficiently even in low-power systems such as battery-based applications or small embedded controllers.

The wide Current Transfer Ratio (CTR) range ensures stable and consistent signal reproduction across varying load and input conditions. This makes the TLP290-4 suitable for both digital and analog signal isolation. Its internal design provides good temperature stability, allowing the device to operate reliably in demanding industrial and consumer environments.

The TLP290-4 supports fast switching speeds, making it appropriate for general logic interfacing, switching power supplies, data transfer circuits, and driver applications. Its SMD package is optimized for automated reflow soldering, enabling efficient manufacturing and assembly in large-scale production.

Overall, the TLP290-4 delivers a strong combination of compact size, reliable isolation, low power consumption, and excellent electrical performance, making it a versatile choice for applications that require multi-channel signal isolation and noise immunity.

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Features

• Quad-channel optocoupler (4 LEDs + 4 phototransistors)
• Compact SMD package
• High isolation voltage (typically 3750 Vrms)
• Low input drive current
• Wide CTR range for improved flexibility
• High noise immunity
• Fast switching response
• Suitable for reflow soldering and automatic SMT assembly
• RoHS compliant

Applications

• Multi-channel microcontroller and logic isolation
• SMPS feedback and low-voltage control circuits
• Industrial control and automation systems
• Sensor signal isolation
• Home appliance control boards
• Relay, transistor, and MOSFET driving circuits
• Noise filtering in communication interfaces
• General-purpose signal coupling and isolation

TLP290-4_Datasheet