Even though circuit protection can be one of the last design decisions that engineers make, ensuring today’s more sensitive and complex electronics have the protection necessary to maximize system efficiency and reliability is becoming increasingly important. Among the many advanced protective solutions that designers currently can evaluate, Bourns® TBU® (Transient Blocking Unit) High-Speed Protectors (HSPs) stand out for their superior performance and versatility. This blog post explores innovatively using Bourns® TBU® HSPs as gate switching drivers, highlighting their unique benefits and practical implementation.

The Challenge of Gate Switching

Gate switching is a critical function in many electronic circuits, particularly in power electronics. It involves controlling the gate of a semiconductor device, such as a MOSFET or an IGBT, to regulate the flow of current. The challenge lies in protecting these sensitive gate circuits, which are more susceptible voltage swell events or occasional incorrect wire connections (miswire). These events are typically high-energy and slow-moving waveforms that are difficult to mitigate. Without effective protection, these harmful conditions can cause device failure and/or severely degrade performance.

Because of the high-energy nature of these threats, traditional protection methods for gate switches often involve bulky and slow absorption-type components that tend to compromise the efficiency and responsiveness of the circuit. This is where Bourns® TBU® HSPs offer a game-changing solution.

What Makes Bourns® TBU® HSPs Unique?

Bourns® TBU® HSPs are designed to provide fast-acting and reliable protection against transients. They operate by creating a high-impedance barrier during an overcurrent event, effectively blocking the transient with the added benefit of safeguarding downstream components. Key features include:

1. High-Speed Response: TBU® HSPs can react in nanoseconds, ensuring that transient events are blocked before they can cause any damage.
2. Resettable Protection: Unlike traditional fuses, TBU® HSPs automatically reset after the transient condition has cleared, allowing the circuit to resume normal operation without manual intervention.
3. Compact and Efficient Design: Their small footprint and low insertion loss make them ideal for space-constrained applications where increased efficiency is demanded.

Application as Gate Switching Drivers

Utilizing Bourns® TBU® HSPs as gate switching drivers involves integrating these protectors into the gate drive circuit. Here’s a step-by-step overview of the process:

1. Identify the Gate Drive Requirements: Determine the voltage and current requirements for the gate of the semiconductor device.
2. Select the Appropriate TBU® HSP: Determining the right TBU® HSP model starts by matching the voltage and current ratings needed for the application.
3. Circuit Integration: Proper integration into the gate driver circuit requires accurate positioning, orientation, and connection of the TBU® HSP to the gate of the semiconductor device.
4. Test and Validate: It is important to perform thorough testing to validate that the TBU® HSP effectively protects the gate during transient events and does not interfere with normal operation.

Real-World Applications

Bourns® TBU® HSPs are being successfully used in various industries, including:

• Power Supplies: Protecting the gate drivers in high-efficiency power supplies to ensure reliable operation.
• Renewable Energy: Safeguarding the gate circuits in solar inverters and wind turbine controllers.
• Automotive Electronics: Enhancing the durability of gate drivers in electric vehicles and advanced driver-assistance systems (ADAS).

Conclusion

Full details of how to implement Bourns® TBU® High-Speed Protectors as gate switching drivers, including a circuit operation review, are presented in a new application note entitled, Using Bourns® TBU® High-Speed Protectors. Due to their response time characteristics and the ability to react 1,000 times faster than a contactor or relay, TBU® HSPs provide a straightforward, reliable way to protect equipment from high-energy overvoltage events.

Bourns continues to make significant advancements to its circuit protection technologies and continues to expand its line of solutions.  As the demand for high-performance and resilient electronic components continues to grow, solutions such as Bourns® TBU® HSPs will play an enabling role in driving innovation that helps to ensure the longevity of critical electronic circuits.

Explore the potential of Bourns® TBU® High-Speed Protectors in your next project and experience the benefits of cutting-edge circuit protection. For more information, visit Bourns® TBU® HSPs.