Why is voltage stability of PCAP touch screens so important?

As the original manufacturer of PCAP touch screens, we are well aware of the importance of the working voltage parameters of PCAP touch screens. We are often asked by customers, 'What is the operating voltage range of your product?' This question may seem simple, but it directly affects the user experience of the end product.
 

The working voltage of a touch screen usually refers to the power supply voltage required to drive the touch sensor. At present, the working voltage of mainstream PCAP touch screens is mostly around 3.3V or 5V, and the specific value may vary depending on the screen size and technical solution. For example, the small and medium-sized touch screens under 7 inches that we produce mostly use 3.3V power supply; However, large-sized products over 15 inches may require a voltage of 5V or even higher.
 

Why is voltage stability of PCAP touch screens so crucial?

When the voltage fluctuates, the touch screen may experience insensitive touch, coordinate drift, or even complete malfunction. Especially in industrial application scenarios, unstable voltage may lead to frequent errors in touch devices on the production line. Therefore, our products are designed with a wide voltage adaptation circuit that can operate stably within a range of ± 10% of the rated voltage.
 

In practical applications, we have found that many customers tend to overlook the impact of power quality on touch screens. It is recommended to separately configure a voltage regulator circuit for the PCAP touch screens during system design to avoid sharing power with other high-power modules. At the same time, grounding treatment should also be done well, which can effectively reduce voltage fluctuations caused by electromagnetic interference.
 

As a PCAP touch screens manufacturer with 15 years of experience, our products have undergone rigorous voltage surge testing and long-term aging testing to ensure stable operation under various voltage conditions. If you have any questions about the voltage parameters of a specific model, please feel free to contact our technical team at Xinlilai for detailed specifications.