STMicroelectronics EVALSTGAP4S

Overview

EVALSTGAP4S from STMicroelectronics is a galvanically isolated evaluation board for the STGAP4S advanced single-channel gate driver IC, designed to drive 650 V SiC MOSFETs (SCTH100N65G2-7AG) in half-bridge configuration with integrated isolated flyback power supplies, desaturation detection, soft turn-off, and SPI daisy-chain programmability. It supports up to 520 V DC bus voltage and 1200 V isolation working voltage.

For engineers reviewing the EVALSTGAP4S datasheet, EVALSTGAP4S pinout, EVALSTGAP4S application, or EVALSTGAP4S equivalent, this board enables rapid validation of STGAP4S protection features-including overtemperature shutdown, negative gate driving, isolated ADC monitoring, and fault LED indication-in high-voltage motor control and industrial inverter designs.

Technical Context

The board implements two STGAP4S SO-36W drivers in independent high-side/low-side channels, each with an integrated isolated flyback controller powering +18 V / –5 V gate supplies. The architecture separates LV logic (3.3 V, 5 V tolerant) from HV gate drive domains via reinforced galvanic isolation.

Each STGAP4S provides desaturation detection with adjustable blanking time, soft turn-off triggered by DESAT or overtemperature events, and internal temperature sensing with warning/shutdown thresholds. SPI daisy-chaining allows synchronized configuration and real-time status register readout across multiple boards.

Key Specifications

Availability

EVALSTGAP4S is available at Aetrix Electronics and suitable for industrial motor drives, SiC-based solar inverters, and EV onboard charger reference designs requiring stable component supply and validated gate driver evaluation infrastructure.

Supply support for EVALSTGAP4S includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, power, and microcontroller solutions with broad IP portfolio and manufacturing scale.

EVALSTGAP4S belongs to ST's STGAP family of isolated gate drivers-designed specifically for robust, high-reliability switching of wide-bandgap devices in harsh industrial and traction environments.

FAQ

What power switches can be evaluated with EVALSTGAP4S?

EVALSTGAP4S is configured with two SCTH100N65G2-7AG 650 V, 20 mΩ SiC MOSFETs in H2PAK-7L package, wired in half-bridge topology. It supports direct evaluation of STGAP4S gate driving performance with these devices, including desaturation detection timing, negative gate bias stability, and soft turn-off behavior under realistic switching conditions.

Does EVALSTGAP4S require external power supplies?

No external high-voltage gate supplies are required: each STGAP4S channel integrates its own isolated flyback controller generating +18 V and –5 V for gate driving. Only a single 3.3 V low-voltage logic supply and a high-voltage DC bus (≤520 V) are needed for operation and evaluation.

How is SPI daisy-chaining implemented on this board?

The board routes SPI signals (SCLK, MOSI, MISO, nCS) between U1 and U2 STGAP4S ICs using dedicated PCB traces and jumpers. Multiple EVALSTGAP4S boards can be chained via J9 flat-cable connectors, enabling synchronized programming and diagnostic readout of up to eight STGAP4S devices using STSW-STGAP4 GUI software.

Can EVALSTGAP4S be used without STEVAL-PCC009V2?

Yes - STEVAL-PCC009V2 is an optional USB-to-SPI adapter board. EVALSTGAP4S can be interfaced directly via its J2 (2×5 angled header) and J4 (2×5 female header) using any standard SPI host controller, provided correct voltage levels (3.3 V logic), signal timing, and protocol compliance with STGAP4S register map are maintained.