Overview
The diode plays a variety of important roles in POS (Point of Sale) terminals, mainly in the following aspects:
- Anti-reverse connection protection: The diode can be used to prevent damage to the internal circuit of the POS machine when the power supply is reversed.
- Overvoltage protection: When the voltage exceeds the safe range, the Zener diode turns on, clamping the excessive voltage within a specific range to protect other sensitive components.
2.Signal Rectification
AC-DC: There may be some modules in the POS machine that need to convert AC power into DC power (such as printing modules or battery charging circuits)
3.Data Communication
Signal isolation: In some POS serial communication (such as RS-232 or USB) circuits, diodes can be used to isolate signals or prevent reverse flow of signals to ensure normal communication.
4.Charging Circuit
Preventing backflow: In the battery charging circuit of POS, the diode prevents the battery from discharging reversely to the power source, thereby improving the reliability of the charging circuit.
5.Switching Function
Fast switching: Using Schottky diodes or fast recovery diodes, fast switching functions can be achieved in some high-frequency circuits, such as high-frequency switching power supplies or data transmission modules.
Application Circuit Diagram
For detailed application circuit diagram, please visit：https://semiware.com/en/applications/pos/
About Semiware
Semiware has a comprehensive product lineup of circuit protection device products. The company leverages its technology in the semiconductor field and application background in end products to serve customers in the electronics, automotive and industrial markets. For more information, please visit semiware official website: https://semiware.com/en/
If you need to apply for samples or purchase products, please contact us as follows:
Email: bella.liu@semiware.com
Tel: +86-13818226184
Whatsapp: 008613818226184
评论 (0)