Dual-Range Gate Driving for GaN and Si Power Modules
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Solution Overview
Problem
Intelligent Power Modules (IPMs) face challenges in adapting to both GaN and Si devices due to differing threshold voltages, leading to potential device breakdown or increased power consumption when using a single high-voltage integrated circuit tube.
Innovation Solution
A power device with a control input terminal connected to either a high or low level, utilizing first and second driving circuits with different voltage ranges to ensure proper operation of both GaN and Si devices, maintaining adaptability and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high voltage is supplied to the high-voltage integrated circuit tube to ensure the normal operation of the Si device, then the Si device operates normally, but the gate of the GaN device breaks down
Solution Approach 1:
The patent divides the driving circuit into two separate driving circuits: a first driving circuit for driving the GaN device and a second driving circuit for driving the Si device. Each driving circuit is independently configured with appropriate voltage levels and driving capabilities, avoiding the need to use a single high-voltage integrated circuit tube that cannot simultaneously satisfy both device requirements.
Solution Approach 2:
The patent applies different driving conditions to different devices based on their specific characteristics. The first driving circuit provides low voltage suitable for GaN device operation, while the second driving circuit provides high voltage for Si device operation. This localized optimization ensures each device operates within its optimal voltage range without being constrained by the requirements of the other device type.
2Reliability
If a low voltage is supplied to the high-voltage integrated circuit tube to ensure the normal operation of the GaN device, then the GaN device operates normally, but the power consumption of the entire Si intelligent power module increases, causing malfunction of the Si device
Solution Approach 1:
The patent segments the power delivery system into two independent paths: one path through the first driving circuit supplies appropriate voltage to the GaN device, and another path through the second driving circuit supplies sufficient voltage to the Si device. This segmentation eliminates the power consumption problem by ensuring the Si device receives adequate voltage through its dedicated driving circuit rather than being constrained by low-voltage operation.
Solution Approach 2:
The patent optimizes power delivery locally for each device type. The second driving circuit is specifically designed to provide high voltage to the Si device when needed, ensuring proper operation without being limited by the low voltage requirements of the GaN device. This localized power optimization prevents the power consumption and malfunction issues that would arise from uniform low-voltage operation.
3Device complexity
If a single high-voltage integrated circuit tube is used to drive both GaN and Si devices, then the device structure is simplified, but the adaptability to different device types is reduced
Solution Approach 1:
The patent divides the driving function into two separate driving circuits, each optimized for a specific device type. This segmentation increases adaptability by allowing independent optimization of driving parameters for GaN and Si devices, even though it increases the number of circuit components. The segmentation enables the system to accommodate different device characteristics without compromise.
Solution Approach 2:
The patent creates a universal intelligent power module design that can accommodate both GaN and Si devices through the use of two driving circuits. The module structure is designed to be flexible and adaptable, supporting different device types by providing dedicated driving paths. This multi-functionality approach allows the same module design to work with different semiconductor device technologies.
Data Source
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AI summary
A power device (100) and an electrical appliance (1000). The power device (100) comprises a control input end (SS), a first driving circuit (105) and a second driving circuit (106), wherein when the control input end (SS) is connected to a high level or a low level respectively, the first driving circuit (105) and the second driving circuit (106) respectively output a high/low level signal in a first voltage range or a high/low level signal in a second voltage range, and the first voltage range is different from the second voltage range.