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Home > Products > Isolators > Isolators - Gate Drivers

STMicroelectronics STGAP1S

Name: STGAP1S
Brand: STMicroelectronics
SKU: STGAP1S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STGAP1S

Manufacturer:: STMicroelectronics

Category:: Isolators - Gate Drivers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: STGAP1S.pdf

Description:: DGTL ISO 2.5KV 1CH GATE DVR 24SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STGAP1S from STMicroelectronics is a galvanically isolated single-channel gate driver IC for N-channel MOSFETs and IGBTs, qualified per AEC-Q100 for automotive use. It delivers 5 A sink/source drive current at 25 °C, supports up to 1500 V high-voltage rail, features ±50 V/ns dV/dt immunity, and integrates desaturation detection, active Miller clamp, and SPI-configurable protection - enabling robust motor control in EV inverters and industrial drives.

For engineers reviewing the STGAP1S datasheet, STGAP1S pinout, STGAP1S application, or STGAP1S equivalent, key selection considerations include its 100 ns propagation delay, programmable deadtime with violation error reporting, negative gate drive capability, dual-level turn-off, and diagnostic status output via open-drain and SPI interface.

Technical Context

The STGAP1S employs true galvanic isolation between low-voltage control logic and high-voltage floating output stage, using integrated level shifters and isolated voltage regulators (VREGISO for VH/VL, VREG for VDD). Its architecture separates sink (GOFF) and source (GON) outputs to enable flexible gate biasing, including negative gate drive configurations.

Protection is implemented through hardware- and firmware-coordinated functions: DESAT detection triggers within 100 ns of overcurrent onset; SENSE input enables external shunt-based overcurrent sensing; VCE active clamping limits collector-emitter voltage during switching transients; and 2-level turn-off allows configurable soft-shutdown behavior during fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Isolation Voltage	5.7 kVRMS (UL 1577), enabling safe operation in 1500 V systems
Driver Output Current	5 A sink/source at 25 °C - sufficient to drive high-Ciss IGBTs/MOSFETs in 600–1200 V inverters
Propagation Delay	100 ns max - ensures precise PWM timing control in high-frequency motor drives
dV/dt Immunity	±50 V/ns across –40 to 125 °C - prevents false triggering in noisy high-power environments
Supply Rail Range	VH up to 1500 V, VL down to –10 V - supports asymmetric and negative gate biasing
Fault Response Time	DESAT detection latency ≤100 ns - enables fast shutdown before device destruction
SPI Interface	Full-duplex, CRC-protected, daisy-chain capable - allows centralized configuration and real-time diagnostics

Pinout & Package

STGAP1S is housed in a SO24W (wide-body SOIC-24) package with reinforced galvanic isolation barrier separating low-side (control) and high-side (output) pins. The package provides creepage/clearance >8 mm and meets UL 1577 and IEC 60747-5-2 safety standards.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Low-side logic supply	3.3 V input powering control logic, SPI, and diagnostics; includes UVLO/OVLO monitoring
GND	Low-side ground reference	Reference for VDD, IN+, IN-/DIAG2, SDI, SDO, CS, and DIAG1 signals
IN+	Digital input (active-high)	Primary PWM input; edge-triggered, deglitch-filterable via SPI
IN-/DIAG2	Configurable dual-function pin	Either second PWM input or diagnostic status output (open-drain)
SD	Hardware fault reset	Asynchronous stop command input - forces immediate gate turn-off and fault latching
GON	High-side gate source output	Drives gate high with up to 5 A peak current; supports negative supply connection
GOFF	High-side gate sink output	Drives gate low with up to 5 A peak current; independent of GON for optimized layout
VH	High-side positive supply	Up to 1500 V rail; powers floating output stage and internal VREGISO
VL	High-side negative supply	Supports –10 V to 15 V range - enables negative gate bias for enhanced noise immunity
GNDISO	High-side isolated ground	Reference for VH, VL, SENSE, ASC, VCECLAMP, and CLAMP pins
SENSE	Overcurrent sense input	Analog input for external shunt resistor; threshold programmable via SPI (10–100 mV range)
ASC	Active Miller clamp control	Enables dynamic Miller clamp during turn-on to prevent spurious turn-on
VCECLAMP	VCE active clamping trigger	Connects to external clamping circuit to limit IGBT VCE during desaturation events
CLAMP	Miller clamp output	Direct gate clamp path during Miller plateau; reduces risk of shoot-through
SDO	SPI data output	Serial output for reading STATUS/CONFIG registers and diagnostic flags
SDI	SPI data input	Serial input for writing configuration registers and issuing commands
CS	SPI chip select	Active-low enable for SPI communication; supports daisy-chaining multiple devices
DIAG1	Open-drain fault indicator	Asserts low on any detected fault (DESAT, UVLO, OVLO, thermal, etc.)
CK	SPI clock input	Up to 10 MHz clock; synchronous with SDI/SDO for register access and diagnostics

Key Features

Feature	Design Value
Programmable Deadtime	Configurable via SPI with built-in violation error flag - eliminates cross-conduction risk in half-bridge topologies
2-Level Turn-Off (2LTO)	Three modes (Always/Fault/Never) - enables soft-shutdown only during faults to preserve efficiency
Self-Diagnostic Routines	On-chip checks for GON/GOFF path integrity, SENSE/DESAT comparator functionality, and resistor health - reduces need for external test fixtures
Temperature Warning & Shutdown	Two thresholds: warning at 145 °C, shutdown at 165 °C - protects against thermal runaway without external sensors
Asynchronous Stop Command	Hardware SD pin forces immediate gate turn-off and latches fault state - critical for functional safety (ASIL-B/C support)
CRC-Protected SPI	8-bit CRC on all SPI transactions - prevents register corruption from EMI-induced bit flips in noisy power electronics environments

Applications

EV Traction Inverter

Industrial Motor Drive

Use Scenario: High-power 3-phase inverter controlling permanent magnet synchronous motor in battery electric vehicle.

IC Role / Device Role / Timing Role: Isolated gate driver for high-side IGBTs in each phase leg, managing 1200 V DC-link switching at 10–20 kHz with precise deadtime control.

Use Value: 5 A drive strength ensures fast IGBT turn-on/off; dV/dt immunity prevents false triggering during high di/dt commutation; SPI diagnostics feed vehicle ECU for predictive maintenance.

Use Scenario: Variable-frequency drive for HVAC compressors and pumps in commercial building automation.

IC Role / Device Role / Timing Role: Gate driver in dual-channel half-bridge modules, supporting regenerative braking and sensorless FOC algorithms.

Use Value: Negative gate drive (VL = –5 V) improves noise margin; desaturation detection enables fast fault response (<100 ns); programmable deglitch filter suppresses EMI-induced input glitches.

Solar String Inverter

EV Charging Station Power Stage

Use Scenario: MPPT-enabled DC-AC conversion in residential solar inverters with transformerless topology.

IC Role / Device Role / Timing Role: Isolated driver for SiC MOSFETs in H-bridge and boost stages, operating at 80–120 kHz with tight timing constraints.

Use Value: 100 ns propagation delay enables accurate high-frequency PWM; VCE clamping protects against voltage spikes during fast SiC switching; SENSE input supports precision current limiting.

Use Scenario: Bidirectional AC-DC and DC-DC conversion in 150 kW+ CCS-compliant EV charging stations.

IC Role / Device Role / Timing Role: Gate driver for high-voltage IGBTs in three-level NPC or T-type converters handling 1000 V DC bus.

Use Value: 1500 V VH rating supports ultra-high-voltage operation; thermal shutdown at 165 °C prevents derating in compact liquid-cooled enclosures; diagnostic outputs feed BMS for system-level fault coordination.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si827x (Silicon Labs)	Lower peak output current (4 A), no integrated VREGISO, no SENSE input - requires external regulators and current-sense amplifier	Lacks integrated overcurrent sensing and active clamping; suited for simpler, lower-power designs without ASIL requirements	Choose when cost sensitivity outweighs diagnostic depth and when external components are acceptable
UCC5870-Q1 (TI)	Higher drive current (10 A), integrated DESAT blanking, but no SPI configuration - fixed-feature set with fewer programmable protections	Optimized for high-speed SiC/GaN switching; lacks programmable deadtime and 2LTO flexibility	Prefer for ultra-fast switching where configurability is secondary to raw drive strength and blanking precision

Compared with Si827x and UCC5870-Q1, STGAP1S uniquely combines AEC-Q100 qualification, SPI-based full configurability, dual-level turn-off, and integrated SENSE/DESAT/VCECLAMP paths - making it optimal for safety-critical, high-reliability automotive and industrial inverters requiring field-upgradable protection behavior.

Availability

STGAP1S is available at Aetrix Electronics and suitable for EV traction inverters, industrial motor drives, and solar string inverters requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for STGAP1S 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/mixed-signal products for automotive, industrial, and consumer markets.

The STGAP1S belongs to ST's gapDRIVE™ family of isolated gate drivers, engineered specifically for high-reliability inverter systems in electric vehicles, renewable energy, and industrial automation - emphasizing functional safety, diagnostic richness, and design flexibility.

FAQ

What is the maximum allowable dV/dt at the VH pin, and how is immunity verified?

The STGAP1S guarantees ±50 V/ns dV/dt transient immunity across its full operating temperature range (–40 to 125 °C), verified per IEC 60747-5-2. This specification is measured under worst-case conditions with VH referenced to GNDISO and validated using standardized pulse generators and oscilloscope-based waveform analysis in ST's qualification labs.

Does STGAP1S support negative gate voltage, and what is the minimum VL value?

Yes, STGAP1S supports negative gate drive via its VL pin, which accepts voltages from –10 V to +15 V relative to GNDISO. This enables robust negative biasing (e.g., –5 V) to improve noise immunity and prevent spurious turn-on in high-di/dt applications such as IGBT-based motor drives.

How does the 2-level turn-off (2LTO) function operate during a desaturation event?

When configured in "Fault" mode, 2LTO activates only upon DESAT detection: it first applies a short, high-current turn-off pulse (typically ~100 ns), followed by a slower, controlled discharge to limit dv/dt and reduce EMI. This two-stage action minimizes voltage overshoot while ensuring reliable device shutdown before thermal damage occurs.

Can STGAP1S be used without an external microcontroller, relying solely on hardware inputs?

Yes - STGAP1S operates in standalone mode using IN+ and SD pins for basic PWM control and hardware fault reset. All protection features (UVLO, DESAT, thermal) remain fully active without SPI communication. However, SPI is required to configure deadtime, deglitch filters, thresholds, and diagnostic reporting modes.

STGAP1S Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: gapDRIVE™

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Technology:: Magnetic Coupling

Number of Channels:: 1

Voltage - Isolation:: 2500Vrms

Common Mode Transient Immunity (Min):: -

Propagation Delay tpLH / tpHL (Max):: 130ns, 130ns

Pulse Width Distortion (Max):: 10ns

Rise / Fall Time (Typ):: 25ns, 25ns (Max)

Current - Output High, Low:: 2.5A, 2.5A

Current - Peak Output:: -

Voltage - Forward (Vf) (Typ):: -

Current - DC Forward (If) (Max):: -

Voltage - Output Supply:: 4.5V ~ 36V

Grade:: Automotive

Qualification:: AEC-Q100

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SO

Approval Agency:: UL

STGAP1S FAQ

1.How can I place an order for STGAP1S through Aetrix?

Please submit a Request for Quotation (RFQ) for STGAP1S on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STGAP1S reliable?

The price and inventory of STGAP1S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STGAP1S is usually 5 days.

3.What payment methods are accepted for STGAP1S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STGAP1S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STGAP1S?

STGAP1S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STGAP1S order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STGAP1S?

For technical support, including STGAP1S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STGAP1S requirements.

6.How does Aetrix verify that STGAP1S is sourced from the original manufacturer or authorized distributors?

All STGAP1S products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STGAP1S meets industry standards.

7.What is the process for return or replacement of STGAP1S?

All STGAP1S units undergo pre-shipment inspection (PSI). If there is an issue with STGAP1S, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STGAP1S part is unused and in its original packaging.

Return procedure for STGAP1S:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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