Conversion Circuit Voltage Control Switching Miller Clamp
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Solution Overview
Problem
Existing conversion circuits for power converters require additional voltage regulators to meet the voltage requirements of both the conversion circuit and semiconductor devices, leading to inefficiencies and potential damage from high voltage electrostatic discharge.
Innovation Solution
A conversion circuit design incorporating a voltage control switching circuit and a miller clamp circuit, which generates and regulates driving signals to prevent voltage levels from exceeding safe limits for semiconductor devices, eliminating the need for additional regulators and protecting against electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional voltage regulators are used to meet voltage requirements, then voltage control precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the voltage regulator functionality directly into the driver circuit that drives the semiconductor device. The driver circuit includes a voltage regulator that generates a regulated voltage for the control terminal, merging two previously separate functions (voltage regulation and device driving) into a single integrated circuit. This reduces the number of external components and simplifies the overall system while maintaining precise voltage control.
2Stability of the object's composition
If additional voltage regulators are used to meet voltage requirements, then voltage stability is improved, but loss of energy increases
Solution Approach 1:
The driver circuit is designed to self-regulate the voltage for the control terminal using an integrated voltage regulator that draws power directly from the supply voltage. The regulator automatically adjusts the control terminal voltage based on the semiconductor device's requirements without needing external regulation, reducing energy losses associated with multiple regulation stages and improving overall system efficiency.
3Device complexity
If system power is directly applied to semiconductor devices, then device complexity is reduced, but reliability deteriorates due to high voltage damage risk
Solution Approach 1:
The driver circuit includes a voltage regulator that pre-regulates the voltage applied to the control terminal of the semiconductor device before the power switch operates. By establishing the appropriate voltage level in advance through integrated regulation, the circuit prevents high voltage damage while maintaining a simple overall structure. The regulator ensures the control terminal receives only the safe, required voltage level.
Data Source
AI summary
A conversion circuit includes a main device including a first terminal, a second terminal and a control terminal, and a voltage control switching circuit including a first terminal configured to receive an first driving signal, a second terminal coupled to the control terminal of the main device and configured to transmit a second driving signal to drive the main device, and a reference terminal coupled to the second terminal of the main device. A current passing through the voltage control switching device is controlled in response to a voltage level of the reference terminal.