OFT Diode Gate Control Circuit for Leakage and Voltage Drop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oxide field trench (OFT) diode control devices face limitations in controlling reverse leakage current and forward voltage drop, making them less efficient compared to MOS transistors and non-controllable diodes in power applications.
Innovation Solution
A control device comprising a controllable current source, capacitor, switches, and diodes is used to regulate the potential difference across an OFT diode, allowing for efficient control of current delivery and switch states based on threshold voltages, thereby reducing leakage current and voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing OFT diode control devices are used, then the diode can be controlled, but the reverse leakage current cannot be effectively reduced and the forward voltage drop remains high
Solution Approach 1:
The patent implements dynamic control of the OFT diode by using a control device that adjusts the gate potential in real-time based on the potential difference between anode and cathode. The control device includes switches and a current source that dynamically modify the gate voltage to optimize diode performance, transitioning from static to dynamic control to reduce leakage current and voltage drop while maintaining reliability.
Solution Approach 2:
The patent changes the electrical parameters of the OFT diode system by introducing a control device that modifies the gate potential (Vga) based on the anode-cathode potential difference (Vak). By adjusting the gate voltage parameter dynamically, the system achieves lower reverse leakage current and reduced forward voltage drop, effectively changing the operational parameters of the diode to improve energy efficiency.
2Loss of energy
If the OFT diode is controlled to reduce leakage current, then energy efficiency improves, but the device complexity increases
Solution Approach 1:
The control device is designed to be self-regulating, using the inherent potential difference between the anode and cathode of the OFT diode to control its own operation. The device automatically adjusts the gate potential based on the diode's own operational state without requiring external control circuits, making the system self-sufficient and avoiding additional complexity while reducing leakage current.
Solution Approach 2:
The patent merges the control function with the OFT diode structure itself by integrating the control device directly with the diode's gate terminal. Instead of adding separate external control circuits, the control functionality is combined with the existing diode structure, using shared components and integrated wiring to reduce overall system complexity while achieving leakage current reduction.
3Loss of energy
If a control device is added to the OFT diode, then leakage current is reduced, but the number of components increases
Solution Approach 1:
The control device is designed with multi-functionality, where a single integrated structure performs multiple functions: it controls the gate potential, responds to potential difference changes, and regulates leakage current. By combining multiple functions into one control device rather than using separate components for each function, the patent reduces the total number of components while achieving effective leakage current reduction.
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 effectively controls the OFT diode, reducing leakage current and voltage drop, enabling it to replace MOS transistors and non-controllable diodes in power applications without the need for additional circuit modifications, while maintaining simplicity and efficiency.
Implementation Method 1
a capacitor (C1) connected between the first node (608) and a second terminal (600)
Data Source
AI summary
A device includes a controllable current source connected between a first node and a first terminal coupled to a cathode of a controllable diode. A capacitor is connected between the first node and a second terminal coupled to an anode of the controllable diode. A first switch is connected between the first node and a third terminal coupled to a gate of the controllable diode. A second switch is connected between the second and third terminals. A first diode is connected between the third terminal and the second terminal, an anode of the first diode being preferably coupled to the third terminal.