Overview
IEC 63373:2022 is an international standard published by the International Electrotechnical Commission (IEC) that provides comprehensive guidelines for testing dynamic ON-resistance in Gallium Nitride (GaN) High Electron Mobility Transistor (HEMT) based power conversion devices. This standard addresses the measurement of charge trapping effects in GaN lateral power transistors, which affect switching performance and device reliability. By standardizing dynamic ON-resistance testing methods, IEC 63373 helps manufacturers, designers, and researchers accurately evaluate GaN power devices under realistic switching conditions.
Key Topics
-
Dynamic ON-Resistance Testing
The standard details test methods to measure the increase in ON-resistance during switching operations caused by charge trapping-a phenomenon linked to current collapse in GaN transistors. This dynamic ON-resistance differs from the static, or DC, ON-resistance and plays a critical role in power loss and efficiency.
-
Applicable Device Types
- GaN enhancement-mode and depletion-mode discrete power devices
- GaN integrated power solutions
- Wafer-level and package-level devices
-
Test Methods Covered
IEC 63373 introduces test circuits and waveforms to enable dynamic ON-resistance assessment under different switching conditions:
- Hard-switching: Characterized by an overlap of voltage and current waveforms during switching (e.g., in totem-pole PFC boost converters, buck converters).
- Soft-switching: Features minimal or no overlap between voltage and current waveforms (e.g., in Zero Voltage Switching (ZVS), LLC converters).
- Resistive switching: Intermediate waveform overlap, mainly used for easier device-level characterization.
-
Measurement Parameters and Symbols
The standard defines essential electrical parameters involved in testing such as drain-to-source voltages (V_DS), gate-to-source voltages (V_GS), ON and OFF pulse widths (t_on, t_off), and device current (I_D). It also explains the use of double-pulse test circuits and timing diagrams needed for precise evaluation.
-
Test Applications
The guidelines support multiple use cases: production testing, device characterization, reliability evaluation, and application-level assessments-all essential for ensuring GaN device performance meets design specifications in power electronics.
Practical Applications
-
Power Electronics Industry
Manufacturers and developers utilize IEC 63373 to consistently assess and optimize GaN HEMT devices used in power converters, motor drives, and energy-efficient power supplies. Accurate dynamic ON-resistance testing directly influences system efficiency and thermal management.
-
Device Reliability and Quality Control
Dynamic ON-resistance measurement helps detect charge trapping and current collapse effects that could degrade device longevity. Applying standardized test procedures aids in quality assurance during fabrication and packaging.
-
Technology Development and Integration
Researchers developing GaN power devices and integrated power modules benefit from IEC 63373 directives to benchmark new designs and process improvements, facilitating faster innovation and industry-wide compatibility.
-
Wafer and Package Level Testing
The standard includes methodologies for minimizing parasitic effects in wafer-level measurements and addresses the impact of self-heating in packaged devices, enabling precise characterization across manufacturing stages.
Related Standards
- IEC Technical Committee 47: Responsible for semiconductor device standards, including other GaN and wide bandgap device-related documents.
- JEDEC Standards (e.g., JEP173): Provides foundational test methods on which IEC 63373 is based, ensuring alignment with semiconductor industry norms.
- Power Device Reliability and Characterization Standards: Complement IEC 63373 by covering broader reliability and test criteria for advanced semiconductor components.
- IEC Electropedia and ISO Terminology Platforms: Offer standardized definitions and terminology to support consistent understanding and communication of test methodologies.
By aligning with IEC 63373:2022 guidelines, stakeholders in the GaN power device ecosystem can accurately measure and manage dynamic ON-resistance, ultimately improving the performance, reliability, and efficiency of modern power conversion systems. This standard is essential for anyone working with GaN HEMT technologies in power electronics development, testing, or application.