1. In the past 30 years, various types of electronic products have evolved towards high frequency, high power, low loss, and high cost performance, which has narrowed the market for traditional EI and C core electronic transformers.

2. Therefore, while the traditional type still accounts for a significant share of the output value of PCBA electronic transformers in mainland China, it is essential for Shanghai SMT processing to accelerate its pace of reform and innovation.

3. Otherwise, PCBA electronic transformers in the mainland will remain in a “working” position for an extended period.

4. The highest level of innovation is the transition from three-dimensional transformers to planar transformers, which reduce volume and weight by 80% compared to traditional types.

5. This has led to a product series ranging from 5W to 20kW and frequencies of 20kHz to 2MHz, with typical power efficiency reaching up to 98%.

6. The next level of advancement is the mass production of chip transformers, which further decrease height, achieving a nearly complete flattening.

7. These transformers are suitable for low-voltage, high-current power supplies with currents exceeding 100A.

8. The structure of PCBA processing typically selects one primary winding with multiple magnetic cores, replacing the traditional approach of multiple windings with a single magnetic core.