Transformer-Isolated Gate Signal Transmission Without High-Voltage Process
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Solution Overview
Problem
Existing signal transmission devices require high-withstand-voltage processes, which are costly and inefficient for applications like vehicle-mounted power supply and motor driving devices.
Innovation Solution
A signal transmission device using a transformer chip that isolates between input and output circuits, eliminating the need for high-withstand-voltage processes by using common low- to middle-withstand-voltage processes, and incorporating transformers in a single package to reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-withstand-voltage processes are used to ensure isolation between input and output, then reliability is improved, but manufacturing cost increases and manufacturing complexity increases
Solution Approach 1:
The patent introduces a transformer chip as an intermediary device to achieve galvanic isolation between input and output circuits. The transformer chip with primary and secondary windings provides the necessary electrical isolation without requiring complex high-withstand-voltage fabrication processes, thus maintaining reliability while simplifying manufacturing
Solution Approach 2:
The patent divides the signal transmission device into separate functional modules: a controller chip, a driver chip, and a transformer chip. This segmentation allows each component to be manufactured using standard processes and then integrated, avoiding the need for costly high-withstand-voltage processes across the entire device
2Reliability
If high-withstand-voltage processes are used to ensure isolation between input and output, then reliability is improved, but device complexity increases
Solution Approach 1:
The transformer chip serves as a mediator that provides galvanic isolation through magnetic coupling rather than through complex high-withstand-voltage semiconductor structures. This approach achieves the same isolation function with significantly reduced manufacturing process complexity
Solution Approach 2:
The transformer chip performs multiple functions: signal transmission, galvanic isolation, and voltage level adaptation. By using a single component that handles multiple functions, the overall device complexity is reduced compared to using specialized high-withstand-voltage processes for each function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces manufacturing costs and enhances efficiency by allowing the use of common voltage processes, suitable for vehicle-mounted power supply and motor driving devices.
Implementation Method 1
a transformer chip 230 having a primary coil 231p and a secondary coil 231s, the primary coil 231p and the secondary coil 231s being wound on the same magnetic core 231c
Data Source
AI summary
A signal transmission device is configured to transmit a pulse signal while isolating between a primary circuit system and secondary circuit system to drive a switching element. The signal transmission device includes: a first external terminal configured to receive a first input signal for driving a state of a driver output; a second external terminal configured to receive a second input signal for ASC operation; and a third external terminal configured to output the driver output and follow a logic level at the second external terminal.