STMicroelectronics STGAP2SICSANC

Overview

STGAP2SICSANC from STMicroelectronics is a galvanically isolated 4 A single-channel SiC MOSFET gate driver in narrow-body SO-8, featuring 4.8 kVPK isolation, 100 V/ns CMTI, and dedicated Miller clamp functionality. It delivers rail-to-rail output drive with 45 ns propagation delay and UVLO optimized for SiC gate thresholds, enabling robust half-bridge control in high-voltage industrial inverters.

For engineers reviewing the STGAP2SICSANC datasheet, STGAP2SICSANC pinout, STGAP2SICSANC application, or STGAP2SICSANC equivalent, key selection criteria include its 1200 V rail capability, dual active-low/active-high inputs for hardware interlock, thermal shutdown at 170 °C, and standby mode reducing quiescent current to 40 µA on VDD and 400 µA on VH.

Technical Context

This driver implements a reinforced isolation barrier between low-voltage logic (VDD/GND) and high-voltage floating section (VH/GNDISO), supporting unipolar or bipolar gate driving configurations. Its dual-input architecture (IN+, IN−) enables hardware-based cross-conduction prevention via truth-table-defined output states and deglitch filtering.

The integrated Miller clamp (CLAMP pin) activates below 1.3–2.6 V threshold to suppress dv/dt-induced turn-on during high-side switching transients, while UVLO on VH (14.5–16.4 V turn-on, 13.8–15.7 V turn-off) ensures safe-state entry during under-voltage conditions. Thermal shutdown (170 °C) and watchdog monitoring of LV-side communication further enforce system-level reliability.

Key Specifications

Pinout & Package

Narrow-body SO-8 package (4.8 × 6.0 mm, 1.27 mm pitch) with reinforced creepage/clearance ≥4 mm and CTI ≥400 V per DIN IEC 112.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si827x and UCC5870-Q1, STGAP2SICSANC uniquely balances 4 A drive, integrated Miller clamp, SO-8 footprint, and ultra-low standby current-making it optimal for space-constrained, energy-efficient industrial SiC inverters where clamp reliability and idle power matter most.

Availability

STGAP2SICSANC is available at Aetrix Electronics and suitable for industrial motor inverters, SiC-based battery chargers, induction heating systems, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified reliability.

Supply support for STGAP2SICSANC 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 devices for industrial, automotive, and consumer markets.

STGAP2SICSANC belongs to ST's STGAP family of reinforced-isolation gate drivers, engineered specifically for high-reliability SiC and GaN power systems demanding high CMTI, fast propagation, and integrated protection in compact packages.

FAQ

What is the purpose of the CLAMP pin on STGAP2SICSANC?

The CLAMP pin provides an active Miller clamp function that monitors the gate voltage of the external SiC MOSFET. When the gate voltage drops below 1.3–2.6 V (VCLAMPth), the internal switch connects the gate to GNDISO, creating a low-impedance path that prevents parasitic turn-on caused by high dv/dt during half-bridge commutation. This eliminates the need for external Miller clamp diodes and improves system reliability in high-speed switching applications.

How does the dual-input (IN+/IN−) architecture prevent cross-conduction?

The IN+ and IN− pins implement hardware interlock via a truth table: only IN+=HIGH/IN−=LOW produces GOUT=HIGH, and only IN+=LOW/IN−=HIGH produces GOUT=LOW. All other combinations-including both HIGH (standby) or both LOW-force GOUT into a safe OFF state. This prevents simultaneous conduction in half-bridge legs even if the MCU fails or sends invalid signals, removing reliance on software-based dead-time control.

Can STGAP2SICSANC drive both unipolar and bipolar gate voltages?

Yes. The device supports unipolar gate driving (e.g., 0 V / +20 V) and bipolar gate driving (e.g., −5 V / +20 V) by configuring external components on the VH and VL rails. Its rail-to-rail output stage and independent VH supply allow flexible gate voltage swing design, while the dedicated CLAMP pin remains functional in both configurations to suppress Miller-induced turn-on during negative gate transitions.

What happens during UVLO on the VH supply?

When VH drops below 13.8–15.7 V (VHoff), the driver enters a safe state: GOUT is forced OFF and CLAMP is activated. This prevents partial turn-on of the SiC MOSFET, which could cause excessive conduction losses or thermal runaway. Once VH rises above 14.5–16.4 V (VHon), normal operation resumes with output state determined by IN+/IN− status-ensuring fail-safe behavior aligned with SiC gate voltage requirements.