Transformer-Isolated Driving Circuit for Low-Cost Signal Transmission

The patent introduces a transformer chip with primary and secondary coils as an intermediary device to achieve electrical isolation. Instead of using complex high-withstand-voltage processes directly between circuit systems, the transformer chip mediates the signal transmission while providing galvanic isolation through magnetic coupling, thereby simplifying the manufacturing process while maintaining reliability

The patent replaces the mechanical/electrical direct connection system with complex high-withstand-voltage processes with a magnetic field-based isolation system. By using electromagnetic induction through transformer coils, the system achieves electrical isolation without requiring complex high-voltage process technologies, substituting magnetic field interaction for direct electrical isolation

The transformer chip serves as an intermediary that enables electrical isolation using standard low-to-middle withstand-voltage processes. By introducing this intermediate magnetic coupling device, the system avoids the need for expensive high-withstand-voltage manufacturing processes while still achieving the required isolation reliability

The patent changes the voltage withstanding parameter requirement by introducing magnetic isolation. Instead of requiring high voltage withstanding capability in the manufacturing process, the system uses magnetic coupling parameters (inductance, coupling coefficient) to achieve isolation, allowing the use of lower-cost standard manufacturing processes