STMicroelectronics STGAP2SM

Overview

STGAP2SM from STMicroelectronics is a galvanically isolated 4 A single gate driver IC designed for high-voltage half-bridge and inverter topologies. It features separated GON/GOFF outputs, 75 ns max input-output propagation delay, 100 V/ns CMTI, and rail-to-rail 4 A sink/source capability at 25°C with UVLO, thermal shutdown, and standby mode - enabling robust motor control in industrial inverters up to 1700 V.

For engineers reviewing the STGAP2SM datasheet, STGAP2SM pinout, STGAP2SM application, or STGAP2SM equivalent, this device supports precise PWM timing in high-noise environments, independent turn-on/turn-off optimization via external gate resistors, and safe-state behavior during supply faults - critical for industrial motor drives, UPS, and PFC designs.

Technical Context

The STGAP2SM implements reinforced galvanic isolation between low-voltage logic (VDD/GND) and high-side gate drive (VH/GNDISO), certified to UL 1577 (4000 V_PEAK) and VDE 0884-17 (3200 V_PEAK production test). Its dual-input architecture (IN+, IN−) enables hardware interlocking to prevent cross-conduction, while deglitch filtering (20–40 ns) rejects transient noise on control lines.

It operates with bipolar or unipolar gate driving configurations, supports VH supply from 9.6 V to 26 V, and integrates active Miller clamp only in the STGAP2SC variant - the STGAP2SM uses separate GON/GOFF pins for independent gate resistor tuning, delivering <20 ns pulse width distortion and 30 ns rise/fall times into 4.7 nF load.

Key Specifications

Pinout & Package

Narrow-body SO-8 package (ECOPACK®, 5.0 mm × 6.0 mm, 1.75 mm height) with reinforced creepage/clearance ≥4 mm and CTI ≥400 V - optimized for high-voltage PCB layout and thermal dissipation (R_thJA = 123 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated gate driver applications.

Compared with Si8271BD-IS and UCC5390SCD, the STGAP2SM uniquely combines separated GON/GOFF outputs with dual-input hardware interlock and full safe-state behavior - making it optimal for industrial inverters where reliability under fault conditions and gate timing flexibility are non-negotiable.

Availability

STGAP2SM is available at Aetrix Electronics and suitable for industrial motor drives, UPS systems, and PFC converters requiring stable component supply, long-term lifecycle support, and traceable sourcing for ISO 9001-certified production.

Supply support for STGAP2SM 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STGAP2SM belongs to ST's STGAP family of reinforced-isolation gate drivers, engineered specifically for high-reliability industrial motor control and power conversion systems demanding functional safety, high CMTI, and fail-safe operation.

FAQ

What is the difference between STGAP2SM and STGAP2SCM?

The STGAP2SM uses separated GON and GOFF outputs for independent gate resistor control, while STGAP2SCM integrates a single GOUT pin with an active Miller clamp (CLAMP pin) to suppress gate spikes in half-bridge configurations. They share identical isolation rating, CMTI, and thermal protection, but differ in pinout and internal output architecture - not interchangeable without PCB redesign.

Does STGAP2SM support negative gate driving?

Yes - the STGAP2SM supports negative gate driving when configured with a split VH supply (e.g., +15 V and −5 V referenced to GNDISO), enabling enhanced noise immunity and improved IGBT turn-off robustness. The datasheet provides explicit schematics for bipolar gate drive using external level-shifting components and dual decoupling capacitors.

How does the standby mode affect output behavior?

In standby mode (activated by holding IN+ = IN− = HIGH for >280 µs), the STGAP2SM forces GOFF into active-low state, places GON in high-impedance, and reduces VDD and VH quiescent current to 65 µA and 550 µA respectively. Outputs remain in this safe state until valid input transitions occur, ensuring zero unintended switching during idle periods.

What layout practices maximize CMTI performance?

To maximize CMTI, place 100 nF ceramic capacitors directly between VDD–GND and VH–GNDISO with minimal trace length; avoid routing noisy traces (e.g., HV bus, gate loops) near IN+/IN−; maintain ≥4 mm clearance/creepage across isolation barrier; and eliminate copper pours or vias beneath the SO-8 body - all per ST's DS12541 layout guidelines.