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STMicroelectronics STGAP1ASTR
- Part No.:
- STGAP1ASTR
- Manufacturer:
- STMicroelectronics
- Category:
- Isolators - Gate Drivers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
STGAP1ASTR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GATE DVR 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,102
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Product details
Overview
STGAP1ASTR from STMicroelectronics is an automotive-qualified, galvanically isolated single-channel gate driver IC for N-channel MOSFETs and IGBTs, featuring 5 A sink/source drive capability, ±50 V/ns dV/dt immunity, 100 ns propagation delay, and integrated desaturation detection, Miller clamp, and SPI-configurable protection. It targets high-reliability motor control in EV/HEV inverters and industrial drives.
For engineers reviewing the STGAP1ASTR datasheet, STGAP1ASTR pinout, STGAP1ASTR application, or STGAP1ASTR equivalent, key selection considerations include its AEC-Q100 qualification, programmable deadtime with violation detection, 2-level turn-off response to faults, VCE active clamping, and diagnostic status reporting via open-drain output and SPI register reads.
Technical Context
The STGAP1ASTR implements true galvanic isolation between low-voltage logic and high-voltage gate-drive sections using ST's proprietary isolation technology, enabling operation with up to 1500 V high-side rail voltage. Its architecture supports negative gate drive and rail-to-rail output swing, critical for robust IGBT switching in half-bridge configurations.
Protection is implemented at both hardware and firmware levels: desaturation detection triggers within 100 ns, SENSE-based overcurrent sensing is configurable via SPI, and self-diagnostic routines verify Miller clamp path integrity, DESAT comparator function, and SENSE resistor connection-ensuring functional safety compliance in ASIL-B systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5 kVRMS (UL 1577 certified), enabling safe operation in 1200 V DC-link systems with reinforced insulation. |
| Peak Output Current | 5 A sink/source at 25 °C, sufficient to drive large IGBTs (e.g., 1200 V/400 A) with fast turn-on/turn-off and minimal gate resistance. |
| Propagation Delay | 100 ns max (input to output), supporting PWM frequencies up to 200 kHz with precise timing control in traction inverters. |
| dV/dt Immunity | ±50 V/ns across –40 to 125 °C, preventing false triggering during high-speed switching transients in noisy power stages. |
| Supply Voltage Range | VH = 13–20 V, VL = GNDISO, VDD = 4.5–5.5 V - supports bootstrap and isolated DC/DC supply topologies without external regulators. |
| SPI Interface | 4-wire full-duplex interface with CRC protection, enabling real-time configuration of deadtime, deglitch filters, fault thresholds, and diagnostic behavior. |
| Protection Features | Integrated DESAT, VCE clamping, Miller clamp, 2-level turn-off, UVLO/OVLO, thermal warning/shutdown, and SENSE overcurrent detection - eliminates need for discrete protection circuitry. |
Pinout & Package
STGAP1ASTR is housed in a SO24W (wide-body SOIC-24) package with 1.27 mm pitch, optimized for creepage/clearance compliance in automotive high-voltage applications. The package provides 8 mm creepage distance and meets IPC-7351B standard land pattern requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Low-side logic supply | 5 V input powering internal 3.3 V regulator for digital core and SPI interface; includes UVLO/OVLO monitoring. |
| VH | High-side floating supply | 13–20 V input for gate drive output stage; powers source/sink drivers and enables negative gate bias when VL is referenced below GNDISO. |
| VL | High-side ground reference | Floating return for VH supply; allows negative gate drive (e.g., –5 V) by setting VL below GNDISO, improving noise immunity during Miller plateau. |
| IN+ | Digital input (active-high) | Primary PWM input signal; accepts 3.3 V/5 V logic; features programmable deglitch filter (50–500 ns) to suppress EMI-induced glitches. |
| SD | Hardware shutdown input | Asynchronous stop command: active-low signal forcing immediate gate turn-off and fault latching, independent of SPI or internal state. |
| OUT | Gate drive output | Rail-to-rail output driving IGBT/MOSFET gate; separate sink (GNDISO) and source (VH) paths enable flexible gate resistor placement and Miller clamp integration. |
| DESAT | Desaturation sense input | Analog input monitoring IGBT collector-emitter voltage via external RC network; triggers fast turn-off (<100 ns) on overcurrent or short-circuit. |
| SENSE | Overcurrent sense input | Differential input for shunt-based current sensing; configurable threshold (50–200 mV) via SPI; used for slower, precision overcurrent protection. |
| VCECLAMP | VCE clamping control | Enables active clamping of IGBT collector voltage during turn-off to limit dv/dt and reduce switching losses in hard-switched topologies. |
| DIAG | Open-drain diagnostic output | Active-low signal indicating fault condition (e.g., DESAT, thermal, UVLO); can be wired-OR'd with other drivers for system-level fault aggregation. |
| SCLK, SDI, SDO, CS | SPI interface signals | Full-duplex 4-wire SPI bus supporting daisy-chaining of multiple STGAP1AS devices; CRC-protected writes ensure configuration integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic Isolation | 5 kVRMS reinforced insulation per UL 1577, enabling direct interface with 1200 V IGBTs without optocouplers or external isolators. |
| Programmable Deadtime | Configurable 0–2 µs deadtime with hardware violation detection - prevents shoot-through in half-bridge while allowing fine-tuning for efficiency vs. reliability trade-offs. |
| 2-Level Turn-Off (2LTO) | Adjustable short-pulse turn-off (e.g., 200 ns) before full turn-off - reduces voltage overshoot and EMI during fault conditions without compromising protection speed. |
| Self-Diagnostic Routines | On-chip verification of Miller clamp path, DESAT comparator, SENSE resistor connection, and gate driver output integrity - satisfies ISO 26262 ASIL-B diagnostic coverage requirements. |
| Temperature Protection | Two-stage thermal management: warning flag at 145 °C and automatic shutdown at 165 °C, with hysteresis to prevent cycling during transient overload. |
Applications
| EV Traction Inverter | Industrial Motor Drive |
|---|---|
Use Scenario: High-power 3-phase inverter controlling permanent magnet synchronous motor in battery electric vehicle (BEV) with 800 V DC-link. IC Role / Device Role / Timing Role: Isolated gate driver for 1200 V IGBT modules in each half-bridge leg; delivers precise 100 ns timing for field-oriented control (FOC) at 16 kHz PWM. Use Value: Enables AEC-Q100-compliant, fail-safe switching with desaturation detection and VCE clamping - reducing system-level fault response time to <500 ns and eliminating external protection ICs. |
Use Scenario: Variable-frequency drive for HVAC compressors and pumps operating in harsh factory environments with high EMI and thermal stress. IC Role / Device Role / Timing Role: Single-channel gate driver for 600 V IGBTs in 3-phase inverter stage; supports negative gate drive to suppress Miller-induced turn-on during high dv/dt commutation. Use Value: Delivers ±50 V/ns noise immunity and programmable deglitch filtering - ensuring reliable operation without spurious shutdowns in electrically noisy industrial settings. |
| EV Charging Station | Solar Inverter |
Use Scenario: Bidirectional AC/DC converter in 150 kW DC fast charger, requiring high-efficiency switching and grid-synchronization. IC Role / Device Role / Timing Role: Gate driver for SiC MOSFETs in totem-pole PFC and isolated DC/DC stages; leverages SPI to adapt deadtime dynamically based on junction temperature. Use Value: Provides 5 A peak drive current and rail-to-rail output - minimizing conduction losses and enabling >98% system efficiency while maintaining AEC-Q100 reliability standards. |
Use Scenario: Central string inverter converting DC from photovoltaic arrays (1000 V MPPT range) into grid-synchronized AC power. IC Role / Device Role / Timing Role: Isolated driver for 1200 V IGBTs in three-level NPC topology; uses SENSE input for DC-side overcurrent protection and DIAG output for centralized fault logging. Use Value: Integrates Miller clamp and 2-level turn-off - suppressing parasitic turn-on and limiting voltage spikes during islanding events, improving system MTBF by >30%. |
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) | Capable of 4 A peak drive, lacks integrated desaturation detection and VCE clamping; relies on external comparators and passive clamping networks. | Requires additional BOM components for fault protection; not AEC-Q100 qualified - limited to industrial, non-automotive use cases. | Choose when cost sensitivity outweighs functional integration and automotive qualification requirements. |
| UCC5390 (Texas Instruments) | Offers 10 A peak drive and higher dV/dt immunity (±100 V/ns), but no SPI configurability; fixed deadtime and protection thresholds. | Less flexible for multi-platform designs; requires hardware changes to adjust fault response - unsuitable for software-defined protection schemes. | Prefer when maximum drive strength and ultra-high noise immunity are prioritized over programmability and diagnostics. |
Compared with Si827x and UCC5390, STGAP1ASTR uniquely combines AEC-Q100 qualification, SPI-based parameter tuning, and comprehensive on-chip protection - reducing design cycle time, BOM count, and validation effort for automotive and industrial inverter platforms.
Availability
STGAP1ASTR is available at Aetrix Electronics and suitable for EV traction inverters, industrial motor drives, and solar inverters requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for STGAP1ASTR 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, specializing in power management, microcontrollers, and automotive-grade analog/mixed-signal ICs.
The STGAP1AS belongs to ST's automotive-qualified isolated gate driver product line, designed specifically for high-reliability, high-voltage motor control in electrified transportation and industrial automation systems.
FAQ
What is the maximum recommended operating temperature for STGAP1ASTR?
The STGAP1ASTR is rated for junction temperatures from –40 °C to 125 °C under continuous operation. Thermal shutdown activates at 165 °C with 15 °C hysteresis, and a warning flag is asserted at 145 °C. PCB layout must maintain ≥2 cm² copper area under the exposed pad and use ≥4 thermal vias to meet these limits in 10 A drive applications.
Does STGAP1ASTR support negative gate voltage drive?
Yes. By referencing VL below GNDISO (e.g., –5 V), the STGAP1ASTR enables negative gate drive for improved Miller immunity. The output stage supports rail-to-rail swing between VL and VH, and the Miller clamp actively pulls the gate to VL during turn-off to prevent spurious conduction in high dv/dt environments.
How is desaturation detection implemented and what is its response time?
DESAT detection uses an internal comparator monitoring the IGBT collector-emitter voltage through an external RC network connected to the DESAT pin. Upon overvoltage detection, the driver initiates 2-level turn-off within 100 ns and asserts the DIAG pin. The DESAT blanking time is programmable via SPI to avoid false triggers during normal switching transitions.
Can multiple STGAP1ASTR devices be controlled via a single SPI bus?
Yes. The STGAP1ASTR supports daisy-chained SPI configuration: SDO of one device connects to SDI of the next, with shared SCLK and CS lines. Each device has a unique addressable register map, and CRC-protected commands ensure configuration integrity across the chain - enabling synchronized parameter updates for multi-phase inverter systems.
STGAP1ASTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
STGAP1ASTR FAQ
1.How can I place an order for STGAP1ASTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STGAP1ASTR 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 STGAP1ASTR reliable?
The price and inventory of STGAP1ASTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STGAP1ASTR is usually 5 days.
3.What payment methods are accepted for STGAP1ASTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STGAP1ASTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STGAP1ASTR?
STGAP1ASTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STGAP1ASTR 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 STGAP1ASTR?
For technical support, including STGAP1ASTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STGAP1ASTR requirements.
6.How does Aetrix verify that STGAP1ASTR is sourced from the original manufacturer or authorized distributors?
All STGAP1ASTR 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 STGAP1ASTR meets industry standards.
7.What is the process for return or replacement of STGAP1ASTR?
All STGAP1ASTR units undergo pre-shipment inspection (PSI). If there is an issue with STGAP1ASTR, 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 STGAP1ASTR part is unused and in its original packaging.
Return procedure for STGAP1ASTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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