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Infineon Technologies AUIRS2191STR
- Part No.:
- AUIRS2191STR
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AUIRS2191STR.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
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Product details
Overview
AUIRS2191STR from Infineon Technologies (formerly International Rectifier) is an automotive-grade high-voltage, high-speed dual-channel gate driver IC for N-channel MOSFETs and IGBTs in half-bridge configurations. It features independent high-side (HO) and low-side (LO) outputs, 600V offset capability, 3.5A peak output current per channel, matched 90ns propagation delays, and 3.3V/5V/15V logic compatibility - deployed in automotive DC-DC converters and high-frequency SMPS.
For engineers reviewing the AUIRS2191STR datasheet, AUIRS2191STR pinout, AUIRS2191STR application, or AUIRS2191STR equivalent, key selection criteria include bootstrap-compatible floating channel operation up to +600V, dV/dt-immune high-side level shifting, undervoltage lockout on both VBS and VCC rails, and CMOS Schmitt-triggered inputs with pull-down for noise immunity in harsh automotive environments.
Technical Context
The AUIRS2191STR integrates two independent HVIC-based gate drive channels: a floating high-side driver referenced to VS with ±600V offset tolerance, and a grounded low-side driver referenced to COM. Its level-shifting architecture uses pulse-transformer-coupled isolation and latch-immune CMOS technology to sustain fast switching under high dV/dt transients.
Each channel includes dedicated undervoltage lockout (UVLO) with 8.9V turn-on and 8.2V turn-off thresholds (0.7V hysteresis) for VBS and VCC supplies, plus matched propagation delay (≤25ns max mismatch) enabling precise dead-time control in synchronous rectification and phase-shifted topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOFFSET Max | 600V - supports high-side switch operation in 400V–600V bus systems like automotive 48V/400V DC-DC converters |
| IO+ / IO− Peak | 3.5A - delivers sufficient gate charge current for fast turn-on/turn-off of 100–500nC IGBTs or power MOSFETs |
| tON / tOFF Typ | 90ns - enables >1MHz switching frequency with minimal timing skew between channels |
| Delay Matching Max | 25ns - ensures consistent channel timing for accurate dead-time implementation and reduced shoot-through risk |
| VIN Logic Compatibility | 3.3V/5V/15V - interfaces directly with microcontrollers, DSPs, and isolated PWM controllers without level-shifting |
| VBS & VCC UVLO | 8.9V (rising), 8.2V (falling) - prevents partial gate drive during supply brown-out, avoiding device stress or erratic switching |
| Package | 16-Lead SOIC Narrow Body - surface-mount package qualified to AEC-Q100 Grade 1 (−40°C to +125°C ambient) |
Pinout & Package
16-Lead SOIC Narrow Body (0.150" wide), RoHS-compliant, moisture sensitivity level MSL3. Pin 1 marked by notch or dot; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Low-side gate drive supply input | Provides regulated 10–20V supply for LO channel and logic core; requires local 1µF decoupling |
| COM | Low-side return reference | Ground reference for LO output and internal logic; must be connected to power ground with low-inductance path |
| LO | Low-side gate driver output | Sinks/sourcing 3.5A to drive N-channel MOSFET/IGBT gate; referenced to COM |
| VS | Floating high-side source reference | Connects to switch node between high-side FET and load; defines high-side channel ground potential |
| VB | High-side floating supply input | Accepts bootstrap or isolated supply (10–20V) referenced to VS; powers HO channel |
| HO | High-side gate driver output | Drives high-side N-channel device gate relative to VS; withstands −0.3V to VB+0.3V |
| HIN | High-side input control | CMOS Schmitt-triggered active-high input; 3.3V/5V/15V compatible with internal pull-down |
| LIN | Low-side input control | CMOS Schmitt-triggered active-high input; independent of HIN for asymmetric PWM or brake control |
| VSS | Logic ground reference | Internal logic ground; tied to COM externally; separates digital noise from power ground |
Key Features
| Feature | Design Value |
|---|---|
| Floating channel architecture | Enables high-side drive up to 600V offset without external level shifters or optocouplers |
| dV/dt immune level shifting | Withstands 50V/ns transient on VS node, eliminating false triggering in noisy motor drive or converter environments |
| Matched propagation delay | ≤25ns max difference between HO and LO channel delays, simplifying dead-time calculation and reducing design margin overhead |
| Independent UVLO per channel | Separate VBS and VCC undervoltage detection prevents partial drive during bootstrap capacitor discharge or supply sag |
| Automotive qualification | AEC-Q100 Grade 1 qualified (−40°C to +125°C), including latch-up Class II Level A and ESD HBM 1000V |
Applications
| Automotive DC-DC Converter | Industrial High-Frequency SMPS |
|---|---|
Use Scenario: Bidirectional 48V–12V DC-DC converter in 48V mild-hybrid vehicles, operating at 200–500kHz. IC Role / Device Role / Timing Role: Dual-channel gate driver controlling synchronous buck-boost topology with precise HO/LO timing and bootstrap-referenced high-side switching. Use Value: 90ns matched delays and 600V offset enable clean zero-voltage switching transitions, reducing conduction losses and EMI in compact power stages. | Use Scenario: 1kW telecom rectifier using phase-shifted full-bridge with SiC MOSFETs. IC Role / Device Role / Timing Role: Isolated gate driver interface for high-side and low-side switches, leveraging dV/dt immunity to suppress false turn-on during hard-switching transitions. Use Value: 3.5A peak output current ensures <100ns gate rise/fall times for 300nC SiC devices, improving efficiency above 300kHz. |
| Onboard Charger (OBC) Auxiliary Supply | EV Traction Inverter Gate Drive Bias |
Use Scenario: Auxiliary 12V supply derived from OBC's 400V DC link via flyback converter. IC Role / Device Role / Timing Role: High-side referenced driver powering gate of primary-side MOSFET, bootstrapped from auxiliary winding. Use Value: 8.2V UVLO threshold prevents erratic switching during startup or light-load conditions where bootstrap voltage sags below 9V. | Use Scenario: Low-power gate bias supply generation for traction inverter's IGBT or SiC half-bridge modules. IC Role / Device Role / Timing Role: Local gate driver supplying isolated, regulated 15V to multiple half-bridge drivers, with fault signaling via HO/LO disable. Use Value: CMOS Schmitt-triggered inputs with pull-down eliminate floating input states during controller reset, preventing unintended gate activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage dual-channel gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS21844STRPBF | Same SOIC-16 package; lacks AEC-Q100 qualification; lower dV/dt immunity (30V/ns); no VSS pin separation | Targeted at industrial SMPS, not automotive; unsuitable for ASIL-B systems requiring qualified components | Select only for cost-sensitive non-automotive designs where qualification and robustness are secondary |
| UCC27211D | 600V-rated, but single-output high-side driver; requires external low-side driver; no integrated bootstrap diode support | Used in asymmetrical topologies (e.g., active clamp forward) where independent high-side control is prioritized | Choose when system-level integration allows discrete low-side driver placement and layout space permits separate bias supplies |
Compared with IRS21844STRPBF and UCC27211D, the AUIRS2191STR uniquely combines automotive qualification, matched dual-channel timing, and fully integrated bootstrap-ready architecture - making it the only option among the three suitable for AEC-Q100-compliant half-bridge DC-DC converters in EV/HEV platforms.
Availability
AUIRS2191STR is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial high-frequency SMPS, and onboard charger auxiliary supplies requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for AUIRS2191STR 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
Infineon Technologies is a global semiconductor leader specializing in power management, automotive electronics, and industrial control solutions, with deep expertise in high-voltage IC design and automotive qualification.
The AUIRS2191STR belongs to Infineon's automotive-qualified HVIC gate driver product line, engineered specifically for robust, high-efficiency switching in 48V–600V automotive power conversion systems.
FAQ
What is the maximum allowable dV/dt on the VS pin?
The AUIRS2191STR is rated for 50V/ns dV/dt on the VS pin under recommended operating conditions. This specification is validated per AEC-Q100 stress testing and ensures reliable level-shifting operation without false triggering during fast-switching events in high-power converters.
Can the AUIRS2191STR drive SiC MOSFETs?
Yes - its 3.5A peak output current, 90ns propagation delay, and 15V gate drive capability support common 1200V SiC MOSFETs with gate charges up to 350nC. Layout must minimize loop inductance and ensure tight bootstrap capacitor placement to maintain VBS stability at >300kHz.
Is an external bootstrap diode required?
No external bootstrap diode is required for standard operation, as the internal circuitry supports direct connection to a bootstrap capacitor. However, a fast-recovery (≤35ns) 1A Schottky diode (e.g., RB055LAM-60) is strongly recommended to prevent reverse current flow and ensure reliable VBS recharge during high-duty-cycle operation.
What is the purpose of the VSS pin?
VSS is the internal logic ground reference, electrically isolated from COM in the die structure. It must be externally connected to COM to establish a common reference for input logic and UVLO comparators - failure to connect VSS to COM results in undefined input behavior and disabled UVLO protection.
AUIRS2191STR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- IGBT, N-Channel MOSFET
- Voltage - Supply:
- 10V ~ 20V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.5V
- Current - Peak Output (Source, Sink):
- 3.5A, 3.5A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 600 V
- Rise / Fall Time (Typ):
- 15ns, 15ns
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AUIRS2191STR FAQ
1.How can I place an order for AUIRS2191STR through Aetrix?
Please submit a Request for Quotation (RFQ) for AUIRS2191STR 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 AUIRS2191STR reliable?
The price and inventory of AUIRS2191STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRS2191STR is usually 5 days.
3.What payment methods are accepted for AUIRS2191STR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRS2191STR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AUIRS2191STR?
AUIRS2191STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AUIRS2191STR 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 AUIRS2191STR?
For technical support, including AUIRS2191STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRS2191STR requirements.
6.How does Aetrix verify that AUIRS2191STR is sourced from the original manufacturer or authorized distributors?
All AUIRS2191STR 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 AUIRS2191STR meets industry standards.
7.What is the process for return or replacement of AUIRS2191STR?
All AUIRS2191STR units undergo pre-shipment inspection (PSI). If there is an issue with AUIRS2191STR, 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 AUIRS2191STR part is unused and in its original packaging.
Return procedure for AUIRS2191STR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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