Key Takeaways
- Toshiba launches TLX9920, a photovoltaic-output photocoupler for automotive solid state relays (SSR)
- The device is housed in a thin, long-creepage-distance SO6L package with a creepage distance of over 8mm
- TLX9920 achieves high isolation voltage (BVs=5000Vrms) and complies with AEC-Q101, the automotive electronic component reliability standard
- The device is suitable for use as a gate driver for high-voltage power MOSFET used in SSR
Introduction to Photocouplers
Photocouplers, also known as optocouplers, are devices that transfer signals between two circuits while maintaining electrical isolation. In the context of automotive equipment, photocouplers play a crucial role in ensuring the reliability and safety of solid state relays (SSR).
Toshiba's TLX9920 Photocoupler
Toshiba Electronic Devices & Storage Corporation has launched the TLX9920, a photovoltaic-output photocoupler designed for use in automotive SSR. The device is housed in a thin, long-creepage-distance SO6L package, which provides a creepage distance of over 8mm. This feature enables the TLX9920 to achieve high isolation voltage (BVs=5000Vrms), making it suitable for use in high-voltage systems and harsh environmental conditions.
Comparison of Photocoupler Packages
| Package Type | Creepage Distance | Isolation Voltage |
|---|---|---|
| SO6L | over 8mm | 5000Vrms |
| DIP | 5mm | 2500Vrms |
| SSOP | 4mm | 1500Vrms |
Applications of TLX9920
The TLX9920 is suitable for use as a gate driver for the high-voltage power MOSFET used in SSR. Combined with a high-voltage power MOSFET, it can achieve high-voltage and high-current switching that is difficult with photorelays. The device is also compliant with AEC-Q101, the automotive electronic component reliability standard, making it a reliable choice for use in automotive equipment.
Benefits of Solid State Relays
The use of SSR in automotive equipment is growing due to their longer lifespan and lower maintenance requirements compared to mechanical relays. SSR have no physical contacts, which eliminates contact wear and the need for regular maintenance. The TLX9920 is designed to meet the evolving needs of automotive systems, which are shifting towards SSR.
Bottom Line
In conclusion, the Toshiba TLX9920 photovoltaic-output photocoupler is a reliable and efficient solution for use in automotive solid state relays. With its high isolation voltage and compliance with AEC-Q101, the device is suitable for use in high-voltage systems and harsh environmental conditions. As the demand for automotive equipment relay units with longer lifespans continues to grow, the TLX9920 is poised to play a crucial role in the development of next-generation automotive systems.