DC-DC power supply EMC conduction rectification, Gu Jing solves the problem of old customers like this
In the field of electronic components, solving every technical problem is a test of the comprehensive strength of suppliers. Recently, Gujing Electronics joined hands with an old customer to successfully solve the EMC conduction problem of a DC-DC power supply, demonstrating the true value of technical services.
Trust of old customers: starting from regular needs
This old customer initially chose the sample of Gu Jing's I-shaped inductor 0912, 300uH ± 10%, 1K/0.3V. Its specifications are: resistance 0.398-0.405 Ω, inductance 300.6-306.7uH, 1.1A variation of 11.5%, 1A temperature rise of 32.2 ℃ variation of 9.5%, long pin, 0.65mm pin, 5mm pin spacing. In 0.7A current applications, this inductor fully meets the basic needs of customers.
The establishment of trust stems from the precise satisfaction of every need. The partnership between Gu Jing and this client is based on long-term stable product quality and reliable performance.
Sudden challenge: EMC conduction test obstructed
However, during the testing process, the customer encountered a technical bottleneck where the EMC conduction test failed. Failure to pass the conduction test means that the product cannot meet the electromagnetic compatibility standards, directly affecting the product's launch process.
Faced with this sudden problem, the customer immediately contacted the Gujing technical team. The Gujing technical engineer quickly intervened and obtained key information through in-depth communication with the customer: the gap that cannot be transmitted is around 5db, and the problem is concentrated in the 200KHZ frequency band.
Technical analysis: Accurately locate the core of the problem
Based on rich experience, the Gujing technical team quickly identified the problem. The EMC conduction problem occurs in the 200KHZ frequency band and is usually closely related to the characteristics of the magnetic core material. The performance of magnetic cores made of different materials varies greatly at different frequencies, and choosing the appropriate material is the key to solving EMC problems in specific frequency bands.
After detailed technical analysis, the Gu Jing team proposed a solution: replacing the inductor material. From the perspective of inductance performance, inductors made of different materials may indeed have differences in various parameters, but targeted adjustments are sometimes required for specific EMC issues.
Implementation Plan: Material Replacement and Performance Balance
Gujing has provided customers with a new product of I-shaped inductor 0912 300uH ± 10% 1K/0.3V made of KN1 material. The new product parameters are: resistance value of 0.343-0.348 Ω (slightly lower than the previous 0.398-0.405 Ω), a change of 11.98% in 0.92A, and a change of 27.9% in 1.1A temperature rise of 32.7 ℃.
The variation of parameters reflects the adjustment of performance characteristics brought by different materials, which is a necessary balance made when solving specific problems. In the field of electronic components, there is no universal optimal solution, only the most suitable solution for specific application scenarios.
Results show significant improvement in transmission issues
After testing the new inductor on the actual board, the conduction problem was improved by 4dB compared to before. This improvement proves the effectiveness of the Gujing technology solution. Subsequently, a packaged resistor was replaced, ultimately solving the conduction testing problem perfectly.
This case shows that solving EMC problems often requires multi-faceted adjustments, and inductance, as a key component, cannot be ignored in its role.
Inductor products, but more importantly, the technical strength to provide solutions to customers' actual problems.
From the initial routine supply, to rapid response when problems arise, to precise technical analysis and effective solutions, Gujing embodies the complete value as an electronic component supplier: not only providing products, but also providing solutions to problems.
Inductance is just a product medium, and solving the different problems encountered in the board is the soul of Gujing. This concept is fully reflected in this case. When customers face technical difficulties, Gujing can provide targeted solutions with profound technical accumulation and rich practical experience, helping customers overcome difficulties and promote project progress.
Conclusion
In the electronic components industry, product quality is the foundation, and technical services are the core value. Through this case, Gujing Electronics once again proves that the value of excellent suppliers lies not only in providing qualified products, but also in becoming partners on the customer's technical path, facing challenges and solving problems together.
With the continuous development of the electronics industry, issues such as EMC will become increasingly complex. Gujing Electronics will continue to deepen its technological expertise, enhance its service capabilities, provide customers with higher quality products and more professional technical support, and become the most trusted partner for customers.
