GaN HEMT Voltage Regulator Circuit With Integrated Protection
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Solution Overview
Problem
Existing electronic systems and devices formed on silicon substrates with Gallium Nitride (GaN) structures face limitations in performance and functionality, particularly in supporting high voltages and requiring advanced control circuits for efficient operation.
Innovation Solution
The development of an electronic device with a monolithic semiconductor substrate covered by a Gallium Nitride layer, incorporating e-mode HEMT power transistors capable of withstanding up to 650 V, along with integrated analog control circuits including logic, voltage regulation, overheating protection, and overcurrent protection, and multiple levels of metallization for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If e-mode HEMT power transistors with 650V capability are used, then voltage handling capability is improved, but device complexity increases due to integrated control circuits
Solution Approach 1:
The patent integrates the power transistor and control circuit onto a single GaN substrate, combining high-voltage power handling with analog control functionality in one monolithic device structure
Solution Approach 2:
The GaN-based device performs multiple functions simultaneously: high-voltage switching, voltage regulation, overheating protection, and overcurrent protection, making it a multi-functional power management component
2Reliability
If multiple protection circuits are integrated, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple protection functions (overheating, overcurrent) are merged into the single GaN device structure, eliminating the need for separate discrete protection components and simplifying the overall manufacturing process
3Adaptability or versatility
If analog control circuits are added, then functionality is improved, but energy consumption increases
Solution Approach 1:
The analog control circuit automatically monitors and protects the power transistor without external intervention, using the device's own operational parameters to trigger protection mechanisms when thresholds are exceeded
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 enables the creation of high-voltage electronic devices with robust control mechanisms, improving reliability and efficiency by addressing overheating and overcurrent issues, thus enhancing the overall performance and functionality of GaN-based electronic systems.
Implementation Method 1
a first resistance having a first positive temperature coefficient and being disposed in said Gallium Nitride layer
Implementation Method 2
said circuit further comprises, between the second terminal and a reference terminal, a Zener diode
Implementation Method 3
at least one e-mode type HEMT power transistor adapted to receive a maximum voltage of 650 V between its drain and its source
Data Source
Figure 1~2(B)
Figure 3(A)~3(B)
Figure 4
AI summary
The present description relates to a voltage regulator circuit (700) formed in and on a monolithic semiconductor substrate having one face covered with a layer of Gallium Nitride, comprising: - between a first terminal (VCC) and a second terminal (DZ), a first resistor (R701) and a first d-mode HEMT transistor; and - between the first terminal (VCC) and the third terminal (VDD), a second d-mode HEMT transistor, in which the midpoint between the first resistor (R701) and the first transistor (T701) is connected to the gates of the first and second transistors (T701, T702).