During the process of helping customers with rectification, Shanghai Leiditech often encounters situations where the DC-DC (such as TOLL TMI3494) of the customers is prone to being damaged by surges, or the IC is easily damaged by static electricity. When choosing ESD and TVS, it is found that only ESD and TVS with back-sweep (low VC clamping voltage) can meet the protection requirements of certain circuit boards.

一、The advantages of TVS with low VC (clamping voltage) and back-to-back structure

1. Excellent protective performance

Provide more precise protection: A low VC means that when a transient voltage occurs, the voltage on the protected circuit can be clamped at a lower level, effectively preventing damage to sensitive electronic components from excessive voltage. 

Reduce the impact on the subsequent circuit: It can reduce the risk of circuit failures caused by overvoltage, thereby enhancing the reliability of the entire system. 

Lower leakage current: With lower leakage current, it enables more energy-efficient designs.

2. High compatibility

Suitable for low-voltage circuits: For electronic devices operating in low-voltage environments, such as integrated circuits and microprocessors, TVS with low VC can better meet their protection requirements without causing significant impact on the normal operating voltage. 

Work in coordination with other components: It can coexist harmoniously with various types of electronic components and will not interfere with the normal operation of other circuits due to its own characteristics.

3、High design flexibility

Saving space: In the design of miniaturized electronic devices, TVS with low VC usually have smaller package sizes, which are conducive to layout and installation, providing more flexibility for circuit board design. 

lBroader application scope: The anti-static protection function is now applicable to a wider range of products, including low-voltage mobile electronic devices, automotive electronics, and industrial control systems, etc. 

Multiple options: Shanghai Lebao has a wide range of low-VC TVS products available for selection. You can choose the appropriate model and parameters based on your specific application requirements.

二、Shanghai Leiditech Research and Development has launched a series of ESD and TVS products with built-in sweeping functions.

The following is a comparison of the conventional TVS and the TVS with return sweep curves.

Conventional TVS characteristic curve diagram

Bring back the characteristic curve graph of the TVS scanner

The differences between the regular TVS characteristic curve graph and the characteristic curve graph with return sweep TVS: 

The main feature of the TVS clamp circuit is that once the voltage reaches the trigger voltage of VT1, it immediately lowers the clamp voltage at both ends of the TVS to the working voltage VRWM and the trigger voltage VT1. This voltage is called Vh. Subsequently, as the current increases, the voltage gradually rises. 

The voltage of the conventional TVS is increased proportionally as the IPP increases, so the clamping voltage is also higher. 

II. Shanghai Lebao presents the comparison between its swept TVS/ESD product series and ordinary TVS/ESD diodes.

Shanghai Lebao offers various types of swept ESD/TVS diodes, including single-channel, multi-channel, and high-power models, to meet customer needs. 

Comparison list of single-channel sweeping TVS/ESD with conventional TVS/ESD

3. List comparing multi-channel sweep TVS/ESD with conventional TVS/ESD

4. Bring back the list of high-power TVS products and compare them with regular TVS products.

From the above comparison, it can be seen that the clamping voltages of the returned sweep TVS and ESD diodes are significantly lower than those of ordinary TVS and ESD diodes. This can effectively protect the subsequent circuit from electrostatic damage.

For more interface protection solutions, please follow the official WeChat account of Shanghai Leiditech or contact the EMC guy.

Shanghai Leiditech specializes in the research, development and sales of products such as ESD, TVS, TSS, GDT, MOV, MOSFET, Zener, inductors, etc. Lebao is committed to providing customers with high-quality products to protect circuits from electrostatic interference and voltage fluctuations. Leiditech has an experienced R&D team that can provide personalized customization services according to customer needs, offering the best solutions for customers.