Transformer Chip Isolation for Lower-Cost Detection Circuits

The patent introduces a transformer chip as an intermediary device between the primary and secondary circuit systems. This transformer chip provides galvanic isolation through magnetic coupling, eliminating the need for direct high-voltage electrical isolation structures. The isolation function is achieved through the transformer's inherent magnetic barrier, which blocks DC and low-frequency signals while allowing AC signal transmission, thus maintaining electrical isolation reliability without requiring high-withstand-voltage processes in the PCB or mounting structures.

The patent extracts the electrical isolation function from the PCB and mounting structures by introducing a dedicated transformer chip. This separates the isolation function into a standalone component, allowing the PCB and mounting structures to use standard low-to middle-withstand-voltage processes. The transformer chip handles all high-voltage isolation requirements, simplifying the overall device structure and reducing manufacturing complexity while maintaining reliable electrical isolation.

The transformer chip serves as a mediator that enables the use of standard low-to middle-withstand-voltage processes in the PCB and mounting structures while still achieving the required electrical isolation capability. The transformer's magnetic coupling provides the necessary isolation barrier, allowing cost-effective standard processes to be used elsewhere in the system without compromising isolation reliability.