GaN Power Package Layout for Low-Inductance ESD Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The large parasitic capacitance of electrostatic discharge protection components in electronic packages leads to excessive parasitic inductance, causing high-frequency oscillations that can damage gallium-nitride power devices and disrupt system operation.
Innovation Solution
A package structure with a leadframe, a gallium-nitride power device, and an electrostatic discharge protection component, where the connection manner between the gate end of the GaN power device, the electrostatic discharge protection component, and the leadframe is optimized to reduce parasitic inductance, using conductive wires to connect the components, thereby suppressing high-frequency oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic discharge protection components are added to protect the GaN power device, then the reliability against ESD pulses is improved, but the parasitic inductance increases causing high-frequency oscillation
Solution Approach 1:
The patent introduces an electrostatic discharge protection component as an intermediary element between the gate terminal and the GaN power device. This mediator component (such as a Zener diode or TVS diode) is specifically configured with optimized parameters to provide ESD protection while minimizing the introduction of parasitic inductance into the circuit.
Solution Approach 2:
The patent applies parameter changes by carefully selecting and optimizing the electrical parameters of the electrostatic discharge protection component, specifically choosing components with capacitance values of 30 nC or greater and operating voltages of 6V or higher. These parameter adjustments enable the protection component to effectively suppress ESD pulses while maintaining acceptable parasitic inductance levels.
2Reliability
If electrostatic discharge protection components with large parasitic capacitance are used, then the ESD protection effect is improved, but high-frequency oscillation occurs due to excessive parasitic inductance
Solution Approach 1:
The patent implements parameter changes by specifying minimum threshold values for the electrostatic discharge protection component parameters: capacitance value of 30 nC or greater and operating voltage of 6V or higher. These parameter specifications ensure that the protection component provides sufficient ESD protection capability while maintaining system stability and avoiding high-frequency oscillation issues.
Solution Approach 2:
The patent employs a dedicated electrostatic discharge protection component that can be optimized independently for its specific function. This specialized component absorbs the ESD energy pulses and can be designed as a disposable or replaceable element, protecting the more expensive and critical GaN power device from damage while allowing the protection component to handle the transient high-energy events.
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 optimized connection manner reduces parasitic inductance by 20-40% and effectively suppresses high-frequency oscillations, ensuring normal operation and improved reliability of electronic devices by resisting electrostatic discharge pulses.
Implementation Method 1
due to the large parasitic capacitance of the electrostatic discharge protection components (such as Zener diodes)
Implementation Method 2
The gate end of the GaN power device is electrically connected to the first pad of the electrostatic discharge protection component by a first conductive wire
Data Source
AI summary
A package structure is provided. The package structure includes a leadframe, a GaN power device, and an electrostatic discharge protection component. The leadframe includes a gate pad, a source pad, and a drain pad, which are disposed on the leadframe. The GaN power device has a gate end. The GaN power device is disposed on the source pad of the leadframe. The electrostatic discharge protection component includes a first pad. The first pad is disposed on the electrostatic discharge protection component. The electrostatic discharge protection component is disposed on the source pad of the leadframe. The gate end of the GaN power device is electrically connected to the first pad of the electrostatic discharge protection component. The first pad of the electrostatic discharge protection component is electrically connected to the gate pad of the leadframe.