STMicroelectronics STGAP2SCMTR

Overview

STGAP2SCMTR from STMicroelectronics is a galvanically isolated 4 A single gate driver IC with integrated Miller clamp, designed for high-voltage half-bridge IGBT/MOSFET control in industrial power converters. It delivers 4 A sink/source drive capability at 25°C, 100 V/ns CMTI, 75 ns max input-output propagation delay, and operates with VH up to 26 V - enabling robust switching in 600/1200 V inverters and UPS systems.

For engineers reviewing the STGAP2SCMTR datasheet, STGAP2SCMTR pinout, STGAP2SCMTR application, or STGAP2SCMTR equivalent, key selection criteria include its dedicated CLAMP pin for Miller current suppression, dual-input logic with hardware interlock, UVLO with 0.75 V hysteresis, and thermal shutdown at 170°C - all in a narrow-body SO-8 package compliant with UL 1577.

Technical Context

The STGAP2SCMTR implements a reinforced isolation barrier (4800 VPEAK surge rating) between low-voltage control logic and high-side gate drive circuitry, supporting unipolar or bipolar gate driving configurations. Its dual-input architecture (IN+, IN−) enables active hardware interlocking to prevent cross-conduction, while the dedicated CLAMP pin activates below 2 V to short the external switch gate to GNDISO during Miller plateau transitions.

It integrates a 170°C thermal shutdown with 20°C hysteresis, UVLO on VH with turn-on threshold of 9.1 V and turn-off at 8.4 V, and a standby mode reducing VDD and VH quiescent currents to 65 µA and 550 µA respectively - all coordinated via synchronized input timing sequences (tSTBY = 280 µs, tWUP = 20 µs).

Key Specifications

Pinout & Package

Narrow-body SO-8 package (4.9 × 6.0 mm, 1.75 mm height) with creepage/clearance ≥4 mm and CTI ≥400 V - certified to UL 1577 (E362869) and compliant with ECOPACK2 environmental standards.

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, STGAP2SCMTR uniquely combines 4 A drive, dedicated CLAMP pin, dual-input hardware interlock, and standby mode - making it optimal for space-constrained, high-reliability 1200 V industrial inverters where BOM reduction and functional safety are prioritized.

Availability

STGAP2SCMTR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, induction heating systems, and EV battery charging stations requiring stable component supply across multi-year production cycles.

Supply support for STGAP2SCMTR 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.

STGAP2SCMTR belongs to the STGAP2S family of reinforced-isolation gate drivers, engineered specifically for high-reliability, high-voltage power conversion systems demanding integrated protection, compact layout, and reduced external component count.

FAQ

What is the purpose of the CLAMP pin on STGAP2SCMTR?

The CLAMP pin provides an active Miller clamp function that activates when the external switch gate voltage falls below 2 V (typical), creating a low-impedance path to GNDISO. This prevents false turn-on caused by Miller current during high-dv/dt switching events in half-bridge configurations - eliminating the need for external clamp diodes and reducing gate loop inductance.

How does the standby mode operate, and what is its power impact?

Standby mode is entered when both IN+ and IN− are held high for >280 µs, reducing VDD and VH quiescent currents to 65 µA and 550 µA respectively. Outputs enter safe state (GOUT low, CLAMP active), and wake-up occurs within 200 µs after valid input transition - enabling significant idle power savings in intermittent-duty applications like HVAC fan control.

Can STGAP2SCMTR drive both IGBTs and SiC MOSFETs?

Yes - its 4 A sink/source capability, 26 V VH rating, and 30 ns rise/fall times support gate driving of IGBTs up to 1200 V and SiC MOSFETs up to 1700 V. The 100 V/ns CMTI and reinforced isolation ensure robust operation with fast-switching SiC devices, while the CLAMP pin mitigates Miller-induced turn-on common in wide-bandgap transistors.

What layout practices are critical for maintaining CMTI performance?

To preserve 100 V/ns CMTI, place 100 nF ceramic capacitors directly between VDD–GND and VH–GNDISO with minimal trace length (<2 mm), use separate ground planes for logic and isolated sides, avoid routing traces under the SO-8 body, and isolate VH/GNDISO vias from noisy power loops. These practices minimize common-mode noise coupling across the isolation barrier.