STMicroelectronics STGAP2SICSAC

Overview

STGAP2SICSAC from STMicroelectronics is a galvanically isolated 4 A single-channel SiC MOSFET gate driver in wide-body SO-8W package, featuring 1200 V isolation voltage, 100 V/ns CMTI, 45 ns propagation delay, rail-to-rail output, and dedicated Miller clamp pin - designed for high-reliability 600/1200 V inverters in industrial motor drives and UPS systems.

For engineers reviewing the STGAP2SICSAC datasheet, STGAP2SICSAC pinout, STGAP2SICSAC application, or STGAP2SICSAC equivalent, key selection criteria include SiC-optimized UVLO thresholds (14.5–16.4 V turn-on), dual active-low/high logic inputs with hysteresis, thermal shutdown at 170 °C, standby mode with sub-1 mA total quiescent current, and UL 1577 / VDE 0884-11 certified 6 kV isolation.

Technical Context

The STGAP2SICSAC implements a reinforced capacitive isolation barrier between LV control logic (VDD/GND) and HV floating output stage (VH/GNDISO), enabling safe operation in half-bridge topologies up to 1200 V bus voltage. Its dual-input architecture (IN+, IN−) supports hardware interlocking and deglitch-filtered signal conditioning to prevent cross-conduction.

It integrates a Miller clamp function triggered at 1.3–2.6 V threshold on CLAMP pin, actively sinking gate current during high dV/dt transitions to suppress parasitic turn-on. The device enters a defined "safe state" (GOUT OFF, CLAMP ON) during UVLO, thermal shutdown, watchdog timeout, or standby activation - ensuring fail-safe behavior without external circuitry.

Key Specifications

Pinout & Package

Package: Wide-body SO-8W (8-pin, 7.59 mm × 10.52 mm, creepage/clearance ≥8 mm), RoHS-compliant ECOPACK2, rated for 150 °C max junction temperature and 130 °C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8273AC-B-IS, STGAP2SICSAC delivers full 1200 V capability and integrated Miller clamp for simplified half-bridge design; versus UCC5870QDWJRQ1, it provides identical isolation and SiC optimization in a smaller SO-8W footprint at lower system cost for industrial applications.

Availability

STGAP2SICSAC is available at Aetrix Electronics and suitable for industrial motor inverters, UPS power stages, and SiC-based battery chargers requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified reliability.

Supply support for STGAP2SICSAC 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 products for industrial, automotive, and consumer markets.

The STGAP2SICSAC belongs to ST's STGAP family of reinforced-isolation gate drivers, engineered specifically for robust, high-efficiency SiC and GaN power conversion in industrial motor control and power supply applications.

FAQ

What is the purpose of the CLAMP pin on STGAP2SICSAC?

The CLAMP pin provides an active Miller clamp function that sinks gate current when the external SiC MOSFET's gate voltage falls below 1.3–2.6 V. This prevents parasitic turn-on caused by high dv/dt across the Miller capacitance during high-side switch commutation in half-bridge configurations, eliminating the need for external clamp diodes or resistors.

Does STGAP2SICSAC support bipolar gate driving?

Yes - the STGAP2SICSAC supports both unipolar (VH only) and bipolar (VH + VL) gate driving configurations. Its rail-to-rail output and dedicated CLAMP pin enable flexible implementation of negative gate turn-off voltages when paired with an external negative supply, improving SiC MOSFET switching robustness and reducing switching losses.

How does the standby mode reduce power consumption?

In standby mode, STGAP2SICSAC reduces VDD quiescent current to 40–65 µA and VH quiescent current to 400–700 µA while forcing GOUT low and CLAMP high. Entry requires holding IN+ and IN− high for >200 µs; exit requires a specific sequence including a filtered wake-up pulse, enabling ultra-low idle power in intermittent-duty systems like smart chargers.

What safety certifications apply to STGAP2SICSAC?

STGAP2SICSAC is UL 1577 recognized (file E362869), VDE 0884-11 certified for reinforced isolation, and AEC-Q100 qualified. It achieves 6 kV galvanic isolation, 8 mm creepage/clearance, and CTI ≥400 V - meeting IEC 61800-5-1 and IEC 62109 requirements for industrial drive and power supply safety standards.