STMicroelectronics EVALSTGAP2SM

Overview

EVALSTGAP2SM from STMicroelectronics is a demonstration board for the STGAP2SM isolated 4 A single gate driver, designed to evaluate high-voltage half-bridge power stages up to 1700 V using TO-220 or TO-247 IGBTs/MOSFETs/SiC switches. It integrates on-board isolated DC-DC converters (5 V input → +15/–3 V output), supports TTL/CMOS 3.3 V/5 V inputs with hysteresis, and enables configurable gate drive voltages (+15/0 V, +15/–3 V, +19/0 V, +19/–3 V).

For engineers reviewing the EVALSTGAP2SM datasheet, EVALSTGAP2SM pinout, EVALSTGAP2SM application, or EVALSTGAP2SM equivalent, this board provides validated evaluation of UVLO, thermal shutdown, Miller clamp (via STGAP2SCM variant), negative gate driving, and propagation delay (100 ns) under real high-power inverter conditions.

Technical Context

The EVALSTGAP2SM supports both STGAP2SM (separate source/sink outputs) and STGAP2SCM (single output + dedicated Miller clamp pin) variants via jumper configuration. Its dual-input logic interface allows polarity selection and hardware interlocking to prevent cross-conduction during controller faults.

On-board isolated DC-DC converters (Murata MGJ2D051509SC) supply gate drivers independently from VAUX = 5 V, enabling rail-to-rail output swing up to 26 V and negative gate biasing. Protection features include undervoltage lockout (UVLO) and temperature shutdown, implemented directly on the board-level design.

Key Specifications

Availability

EVALSTGAP2SM is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, and SiC-based EV charging systems requiring stable component supply and rapid prototyping validation.

Supply support for EVALSTGAP2SM 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 power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer applications.

The EVALSTGAP2SM belongs to ST's high-voltage gate driver evaluation platform family, engineered to accelerate development of robust, high-efficiency power conversion systems using ST's isolated gate drivers.

FAQ

What power devices can be evaluated with the EVALSTGAP2SM?

The board supports N-channel IGBTs and MOSFETs rated up to 1700 V in TO-220 or TO-247 packages, as specified in the bill of materials (Q1/Q2 placeholders). It is validated for use with SiC power switches requiring negative gate bias and fast switching transitions.

Does the EVALSTGAP2SM support both STGAP2SM and STGAP2SCM gate drivers?

Yes - the board accommodates both variants: STGAP2SM (separate source/sink pins) and STGAP2SCM (single output + dedicated Miller clamp pin), as confirmed by Figures 1 and 2 in the DB3768 data brief and corresponding jumper configurations (JP7–JP22).

How is isolation achieved on the EVALSTGAP2SM?

Isolation is implemented via Murata MGJ2D051509SC isolated DC-DC converters (U5/U6), providing reinforced insulation between primary (VAUX = 5 V) and secondary (gate drive rails) sides. The STGAP2SM IC itself provides galvanic isolation between input logic and output power stages.

Can the gate drive voltage be adjusted for different switch types?

Yes - jumpers JP1, JP5, JP6, JP12, JP15, JP17, JP18, and JP20 allow selection among four configurations: +15/0 V, +15/–3 V, +19/0 V, and +19/–3 V. This enables optimization for IGBT saturation voltage, MOSFET R_DS(on), or SiC device safe turn-off.