High-Voltage Amplifier Drive Circuit Without Isolation
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Solution Overview
Problem
High-voltage power supplies that use high breakdown voltage transistors require electrically isolated drive components, leading to increased cost and size due to the necessity of high breakage voltage insulating components like insulated DC/DC converters or photovoltaic circuits.
Innovation Solution
A high-voltage amplifier configuration that omits high breakage voltage insulating components by using a drive unit with semiconductor elements, resistance elements, and current control units to generate output voltage, allowing for a compact and low-cost power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high breakdown voltage transistors are used as active elements controlled from low voltage side, then voltage control capability is improved, but device complexity and cost increase due to requirement of insulated DC/DC converter or photovoltaic circuit
Solution Approach 1:
The patent extracts and removes the insulated DC/DC converter or photovoltaic circuit from the system. By using a high breakdown voltage transistor where the control terminal can withstand high voltages directly, the patent eliminates the need for separate voltage isolation components, thereby simplifying the overall structure while maintaining voltage control capability
Solution Approach 2:
The patent merges the functions of the high voltage switch and the voltage isolation component into a single high breakdown voltage transistor. The control terminal of this transistor is designed to be controlled from the low voltage side while the transistor itself handles high voltage, combining what were previously separate functional elements into one integrated component
2Reliability
If insulated DC/DC converter or photovoltaic circuit is used for electrically isolated drive, then active element control is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the expensive insulated DC/DC converter or photovoltaic circuit from the system by designing a high breakdown voltage transistor that can be directly controlled from the low voltage side, eliminating the need for these costly isolation components while maintaining the essential electrical isolation function
Solution Approach 2:
The patent replaces expensive, complex isolation components with a simpler, more cost-effective high breakdown voltage transistor that achieves the same functional result, reducing manufacturing cost while maintaining reliability
3Reliability
If high breakage voltage insulating component is used, then active element protection is improved, but power supply size increases
Solution Approach 1:
The patent extracts and removes the bulky high breakage voltage insulating component from the system by using a high breakdown voltage transistor that inherently provides the necessary protection without requiring separate insulating components, thereby reducing the overall power supply size
Solution Approach 2:
The patent combines the protection function previously provided by separate insulating components into the high breakdown voltage transistor itself, integrating multiple functions into a single compact component that reduces overall device volume
Data Source
AI summary
A positive high voltage, a first terminal of a semiconductor element, and a first terminal of a first resistance element are connected to a first terminal of a first current controller. A current input terminal of a first active element is connected to a second terminal of the first current controller, and a second terminal of the semiconductor element and a second terminal of the first resistance element are connected to a control terminal of the first active element. A second resistance element is connected between a current output terminal and a control terminal of the first active element. The first current controller allows a drive current corresponding to an input signal to flow in the first active element and allows the drive current output from the first active element to flow into a load, thereby generating an output voltage.