STGAP4S

Isolators - Gate Drivers Overview

The STGAP4S is a galvanically isolated single gate driver for IGBTs and SiC MOSFETs. It features an integrated flyback power controller and ADC, enabling compact inverter designs. The device provides 6.4kV isolation and supports high-side gate currents of tens of amperes with small external MOSFETs. It handles voltages up to 1200V and includes configurable protection thresholds via SPI. Designed for automotive applications, it facilitates ISO 26262 ASIL D certification through comprehensive self-checks and diagnostic registers.

Isolators - Gate Drivers Feature Summary

• Integrates analog-to-digital converter and flyback power controller for simplified high-side supply generation
• Provides advanced diagnostic capabilities including self-checks for connection integrity and internal circuit verification
• Offers flexible output configuration allowing connection to external push-pull buffer circuits for adjustable gate current
• Includes active Miller clamp, UVLO, OVLO, desaturation, overcurrent, and overtemperature detection

Isolators - Gate Drivers Applications

• Electric vehicle traction inverters
• High-power inverter designs with parallel power switches
• Three-phase inverter topologies
• Automotive electric drive systems requiring functional safety

Isolators - Gate Drivers Procurement Notes

Verify the specific package variant, as the STGAP4S is available in SO-36W wide body dual in-line packages. Confirm that the intended application requires the integrated flyback controller and ADC features, which distinguish this part from standard gate drivers. Ensure compatibility with ISO 26262 ASIL D requirements if functional safety certification is needed for the final system design.

Isolators - Gate Drivers Selection Notes

Select the STGAP4S when designing scalable EV drive systems that require high integration and robust diagnostics. It is suitable for controlling inverters of varying power ratings by adjusting gate current via external buffers. Consider this component if the design benefits from integrated power management and SPI-configurable protection parameters to reduce board space and simplify high-voltage side circuitry.

Isolators - Gate Drivers Part Context

The STGAP4S belongs to STMicroelectronics' family of galvanically isolated gate drivers. It is specifically engineered for automotive-grade reliability, supporting both IGBT and SiC MOSFET technologies. The device complements evaluation boards like the EVALSTGAP4S, which facilitate testing in half-bridge and complex three-phase configurations for developers working on next-generation electric mobility solutions.

Isolators - Gate Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Designers should consult official STMicroelectronics resources for direct replacements or pin-compatible alternatives within the isolated gate driver portfolio.

Isolators - Gate Drivers FAQ

How does the STGAP4S support ISO 26262 ASIL D certification?

It includes self-check functions to verify connection integrity, gate drive voltage, and internal circuit operation, along with hardware diagnostic pins and SPI-accessible status registers.

What is the isolation capability of the STGAP4S?

The device provides 6.4kV of galvanic isolation between the high-side and low-side circuits.

Can the gate current be adjusted externally?

Yes, the output circuit allows connection to external MOSFET push-pull buffer circuits to adjust the gate current, enabling control of different inverter power ratings.