company blog about Acquisition ST Evaluation Board:MOSFET Driver Evaluation Board,IGBT DriverEvaluation Board

Acquisition ST Evaluation Board:MOSFET Driver Evaluation Board,IGBT DriverEvaluation Board

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【Core Value of Evaluation Boards: Bridging Theory and Practice】

Driver evaluation boards are specialised test circuit boards designed by chip manufacturers or third parties for specific driver ICs. Their core value lies in establishing a standardised, high-performance testing platform for engineers.

Key functions include:

Rapid Prototype Validation: Evaluation boards typically incorporate fully optimised peripheral circuits tailored for the target driver IC, such as gate resistors, bypass capacitors, isolated power supplies, and load interfaces. Engineers can validate fundamental driver functions and critical parameters—including switching frequency, signal delay, and drive current—without designing PCBs from scratch.

In-depth performance evaluation: Through extensive on-board test points, engineers can readily utilise oscilloscopes, probes and other tools to measure drive waveforms, rise/fall times, dead time, and responses of protection features (e.g., desaturation DESAT, Miller clamping) to assess performance under real-load conditions.

System Compatibility Testing: Many evaluation boards feature flexible designs permitting connection to external MOSFETs, IGBTs, or SiC modules in TO-220 or TO-247 packages. This enables engineers to directly evaluate the driver's performance when paired with their chosen power switches, verifying system-level compatibility and stability.

Compliance Pre-testing: Evaluation boards themselves typically adhere to robust electromagnetic compatibility (EMC) and thermal design specifications, with their schematics and PCB layouts serving as reference points for users' final product designs. Utilising evaluation boards for preliminary testing helps identify potential signal integrity and thermal management issues, laying the groundwork for achieving formal safety and regulatory certifications (e.g., UL, IEC).

【Driver Evaluation Board Application Focus】

Currently, high energy efficiency, high power density, and high reliability are core drivers in the power electronics market. ST's driver and evaluation board product line clearly responds to these trends:

High Energy Efficiency and Wide Bandgap Semiconductor Support: As silicon carbide (SiC) MOSFETs become more prevalent, their switching frequencies and gate drive requirements increase. For instance, the STGAP3SXS driver features optimised under-voltage lockout (UVLO) and desaturation protection thresholds specifically for SiC devices. Its corresponding evaluation board delivers up to 10A sink/source capability and supports negative voltage shutdown for enhanced immunity.

High Power Density and System Integration: To address space-constrained applications, ST offers highly integrated solutions. For instance, the PWD5T60 integrates a three-phase gate driver, six MOSFETs, and bootstrap diodes within a single package. Its EVLPWD-FAN-PUMP evaluation board saves up to 70% PCB space compared to discrete solutions, making it particularly suitable for compact fans and pumps.

High reliability and functional safety: Robust protection features are essential, particularly in demanding sectors such as industrial and automotive applications. Evaluation boards for the STGAP series of isolated drivers, such as EVALSTGAP2SAC and EVLSTGAP3SXS-H, highlight advanced protection mechanisms including Miller clamping (preventing unintended conduction), desaturation protection (overcurrent protection), under-voltage lockout (UVLO), and thermal shutdown. These features are crucial for ensuring the safe operation of applications such as on-board chargers (OBC) for electric vehicles and industrial inverters.