P0080SC semiconductor discharge tube brand manufacturer DOWO
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In the design of surge electrostatic protection solutions, the most important step is to understand and analyze the path of surge current. Only after understanding the path of surge current can we better build a reasonable discharge path for surge current. Some time ago, a customer asked Dongwo Electronics for help: When the GPS interface of the company's monitoring wireless equipment was tested in common mode 3KA@8/20μs±5T, the LDO chip was damaged and could not work normally. How to solve it? In response to this customer's situation, Dongwo Electronic Technology designed a GPS interface surge electrostatic protection solution diagram to protect the customer's circuit safety.
GPS interface surge electrostatic protection scheme design diagram
Detailed explanation of the surge electrostatic protection scheme for GPS interface
From the design drawing of the surge electrostatic protection scheme of the Dongwo GPS interface, it can be seen that Dongwo Electronic Technology performs surge electrostatic protection from two aspects: one is surge protection for the internally fed DC power supply, and the other is protection for the RF signal. For the first-level power supply protection, Dongwo Technology recommends the use of the semiconductor discharge tube P0080SC to absorb lightning strikes or large surge currents. The protection of the feeding part uses the unidirectional transient suppression TVS diode SMBJ6.0A and the Schottky diode B0520W, which can effectively protect the back-end LDO chip from surge impact. The secondary signal interface uses the ESD electrostatic protection diode DW05DLC-BS launched by Dongwo, with an operating voltage of 5V, a low clamping voltage of 18.3V, and a low leakage current of 1uA. According to the IEC 61000-4-2 standard, it can be used to provide ESD protection up to ±30kV (air discharge)/±30kV (contact discharge). According to IEC 61000-4-5, it can withstand a peak pulse current of 17A (8/20us), providing reliable electrostatic and surge protection for interface chips. The ESD diode DW05DLC-BS has a junction capacitance of 1PF, which can ensure the integrity of RF signal transmission.
GPS interface surge electrostatic protection device parameters
Looking at the TSS-PxxxxSC Series Datasheet of Dongwo Electronics, we can see that:
2) TVS diode SMBJ6.0A parameters
Looking at the TVS-SMBJ Series Datasheet of Dongwo Electronics, we can see that:
Looking at the "SBD-B0520W Thru B0540W (SOD-123) Datasheet" of Dongwo Electronics, we can see that:
4) ESD diode DW05DLC-BS parameters
Looking at the ESD-DW05DLC-BS Datasheet of Dongwo Electronics, we can see that:
The above is the design drawing of the surge electrostatic protection solution for the Dongwo GPS interface. If you have special needs, please feel free to discuss. For surge electrostatic protection solutions, look for Dongwo Electronics, and you won’t get lost in circuit protection! The semiconductor discharge tube P0080SC, TVS diode SMBJ6.0A, Schottky diode B0520W, and ESD diode DW05DLC-BS used in the solution have been fully mass-produced by Dongwo Electronics, with stable quality, high reliability, fast delivery, manufacturer's price, free samples, free EMC testing, and free selection. New and old customers are welcome to consult: 137 5773 6996 (same number on WeChat) Yu Gong Dongwo official website: www.dowosemi.cn
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