How to Measure MOSFET Power Breakdown: A Comprehensive Testing Guide

Need professional MOSFET testing and selection support? Olukey, as the authorized distributor of Winsok MOSFETs, provides comprehensive testing guidance and high-quality products to ensure your design’s reliability.

Understanding MOSFET Power Breakdown

Power breakdown in MOSFETs is a critical parameter that determines device reliability and performance limits. Proper measurement techniques are essential for accurate characterization and preventing device failure during testing.

Always start testing with lower voltage/current levels and gradually increase them to prevent accidental device destruction during measurement.

Key Parameters to Measure

Parameter	Description	Typical Test Conditions
Breakdown Voltage (BVDSS)	Maximum voltage before avalanche	VGS = 0V, ID = specified leakage current
Maximum Power Dissipation (PD)	Total power handling capability	TC = 25°C, derated above specified temperature
Safe Operating Area (SOA)	Combined voltage/current limits	Various operating points under pulsed conditions
Avalanche Energy (EAS)	Single-pulse energy capability	Inductive load switching test

Required Test Equipment

High-voltage power supply (rated above expected BVDSS)
Precision current source/meter
Oscilloscope with high voltage probes
Temperature controlled test fixture
Curve tracer (recommended)
Protection circuits and safety equipment

Winsok Quality Assurance

All Winsok MOSFETs distributed by Olukey undergo rigorous testing procedures using state-of-the-art equipment to ensure:

Accurate breakdown voltage specifications
Verified power handling capabilities
100% production testing for critical parameters
Full traceability and reliability data

Step-by-Step Measurement Procedures

1. Breakdown Voltage Measurement

Follow these steps for safe and accurate BVDSS measurement:

Configure test setup with current limiting resistance
Ground the gate terminal (VGS = 0V)
Gradually increase VDS while monitoring drain current
Record voltage at specified leakage current level
Verify temperature effects if required

Always use proper ESD protection measures and wear appropriate safety equipment when handling high-voltage test setups.

2. Power Dissipation Testing

Test Type	Method	Key Considerations
DC Power Test	Continuous power application	Thermal equilibrium required
Pulsed Power Test	Short duration power pulses	Peak power capability verification
SOA Testing	Multiple operating points	Temperature monitoring critical

3. Thermal Measurement Techniques

Use calibrated thermal imaging equipment
Monitor junction temperature via TSP method
Account for thermal resistance of test setup
Allow sufficient time for thermal stabilization

Advanced Testing Considerations

Safe Operating Area Verification

SOA testing requires careful attention to multiple parameters:

Region	Limiting Factor	Test Method
RDS(on) Limited	Maximum current rating	DC test at low VDS
Current Limited	Bond wire/die limits	Pulsed testing
Power Limited	Thermal dissipation	Thermal equilibrium test
Voltage Limited	Breakdown voltage	High voltage sweep

Avalanche Energy Testing

Critical for applications with inductive loads:

Setup unclamped inductive switching circuit
Calculate energy storage in inductor
Monitor device temperature during testing
Verify repetitive avalanche capability if required

Common Testing Pitfalls to Avoid

Important considerations for accurate measurements:

Insufficient current limiting protection
Improper temperature monitoring
Inadequate test fixture thermal management
Missing safety interlocks
Poor measurement connections

Data Analysis and Reporting

Record all test conditions and parameters
Generate standardized test reports
Compare results with datasheet specifications
Document any deviations or anomalies
Maintain calibration records

Regular equipment calibration and verification is essential for maintaining measurement accuracy and reliability.

Laboratory Safety Guidelines

Essential safety measures for high-power testing:

Use proper personal protective equipment
Implement emergency shutdown procedures
Maintain adequate workspace isolation
Follow high-voltage safety protocols
Proper handling of failed devices

Professional Testing Services

Olukey offers comprehensive MOSFET testing services featuring:

State-of-the-art test equipment
Certified testing procedures
Detailed test reports and analysis
Expert technical consultation
Quick turnaround time

Need Professional MOSFET Testing Support?

Trust Olukey’s expertise in MOSFET testing and characterization. Our partnership with Winsok ensures access to both quality products and professional testing services.

Contact Our Testing Experts Today

Whether you need individual device testing or complete characteristic verification, our technical team is ready to support your requirements with professional testing services and expert guidance.