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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Infineon Technologies AUIRS21814S

Name: AUIRS21814S
Brand: Infineon Technologies
SKU: AUIRS21814S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIRS21814S

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: AUIRS21814S.pdf

Description:: IC GATE DRVR HALF-BRIDGE 14SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,328

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Product details

Overview

AUIRS21814S from Infineon Technologies is a high-voltage, high-speed dual-channel gate driver IC for N-channel MOSFETs and IGBTs in half-bridge configurations, featuring independent high-side (up to +600 V) and low-side outputs, 1.9 A source / 2.3 A sink peak current, 160 ns turn-on / 200 ns turn-off propagation delay, and automotive-grade qualification per AEC-Q100. It enables robust motor control in electric power steering systems.

For engineers reviewing the AUIRS21814S datasheet, AUIRS21814S pinout, AUIRS21814S application, or AUIRS21814S equivalent, key selection criteria include bootstrap-compatible floating channel operation, 10–20 V gate drive supply range, 3.3 V/5 V logic compatibility, matched propagation delays, and -40 °C to +125 °C ambient operating range.

Technical Context

The AUIRS21814S integrates a high-voltage level-shifting circuit with latch-immune CMOS technology to sustain dV/dt transients up to 50 V/ns on the VS node while maintaining logic integrity across -5 V to +600 V offset. Its dual-channel architecture uses separate COM and VSS ground references to decouple logic and power return paths.

Unlike the AUIRS2181S (single ground pin), the AUIRS21814S adds dedicated VSS for logic ground-enabling precise noise isolation between input logic and high-side switching nodes-and omits programmable dead-time circuitry, distinguishing it from AUIRS21834/AUIRS21844 variants.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Independent high-side and low-side gate driver for half-bridge N-MOS/IGBT
V_OFFSET (max)	+600 V - supports high-side switching in 400–600 V DC bus applications
I_O+/I_O− (typ)	1.9 A / 2.3 A - drives gate capacitance of ≥10 nF MOSFETs at ≤20 ns rise/fall times
t_ON/t_OFF (typ)	160 ns / 200 ns - enables PWM operation up to ~2 MHz with minimal timing skew
V_CC Range	10 V–20 V - compatible with standard 12 V/15 V gate driver supplies; internal 20 V clamp prevents overvoltage
Logic Compatibility	3.3 V and 5 V CMOS/LSTTL - interfaces directly with microcontrollers and FPGA I/O without level shifters
UVLO Threshold	8.9 V (±0.7 V hysteresis) - prevents erratic switching during brown-out conditions

Pinout & Package

Package: 14-lead narrow-body SOIC (SOIC14N), RoHS-compliant, automotive-qualified, with exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Low-side and logic supply input	Provides power to internal logic and low-side driver stage; must be decoupled near pin
V_SS	Logic ground reference	Dedicated ground for HIN/LIN inputs and internal logic-separate from COM to suppress ground bounce
HIN	High-side input signal	CMOS-compatible digital input controlling HO output; referenced to V_SS
LIN	Low-side input signal	CMOS-compatible digital input controlling LO output; referenced to V_SS
COM	Power ground reference	Return path for LO output and internal level shifter; connects to system power ground
HO	High-side gate drive output	Floating output referenced to VS; drives gate of high-side N-MOS/IGBT in bootstrap configuration
LO	Low-side gate drive output	Ground-referenced output driving gate of low-side N-MOS/IGBT
V_B	High-side floating supply input	Connects to bootstrap capacitor top; supplies high-side driver stage up to 600 V above COM
V_S	High-side floating return	Reference node for HO output and level shifter; tracks switching node voltage in half-bridge

Key Features

Feature	Design Value
Floating channel with dV/dt immunity	Withstands 50 V/ns transient on VS node-prevents false triggering in noisy motor drive environments
Matched propagation delay	≤35 ns skew between HO and LO edges-minimizes shoot-through risk in synchronous rectification
Dual ground separation (VSS + COM)	Isolates logic ground from power return-reduces EMI coupling into MCU interface lines
Lower di/dt gate driver	Controlled edge rates reduce EMI generation without external gate resistors
Undervoltage lockout (UVLO)	Independent 8.9 V threshold with 0.7 V hysteresis on both VCC and VB supplies-ensures safe startup and fault recovery

Applications

Piezo Fuel Injector Driver

Electric Power Steering (EPS)

Use Scenario: High-precision, fast-switching control of piezoelectric actuators in diesel common-rail injection systems requiring sub-microsecond timing accuracy.

IC Role / Device Role / Timing Role: Dual-channel gate driver delivering synchronized high-side and low-side gate pulses to drive stacked MOSFET half-bridges feeding piezo stacks.

Use Value: 160 ns t_ON/200 ns t_OFF and matched delay enable <1 µs dead-time control-critical for avoiding mechanical stress in piezo elements.

Use Scenario: Compact, thermally efficient motor control in column-assist EPS modules operating under wide temperature and vibration conditions.

IC Role / Device Role / Timing Role: Isolated high- and low-side driver enabling 48 V BLDC motor commutation with integrated UVLO and dV/dt noise immunity.

Use Value: AEC-Q100 qualification and -40 °C to +125 °C operation ensure reliability in under-hood automotive environments.

Starter-Alternator Control

Fan & Compressor Inverter

Use Scenario: Bi-directional 48 V/12 V power conversion in integrated starter-generators (ISG), where rapid polarity reversal demands precise shoot-through prevention.

IC Role / Device Role / Timing Role: Half-bridge driver with matched propagation delay and separate VSS/COM grounds to maintain timing integrity during high di/dt transients.

Use Value: ≤35 ns delay matching and 50 V/ns dV/dt tolerance prevent cross-conduction during regenerative braking transitions.

Use Scenario: Variable-speed HVAC blower and refrigerant compressor drives in automotive cabin systems requiring low EMI and high efficiency.

IC Role / Device Role / Timing Role: Gate driver for 600 V-rated MOSFETs in 3-phase inverter legs, leveraging bootstrap operation and low di/dt edge control.

Use Value: 1.9 A/2.3 A peak drive current supports fast switching of >10 nF gate loads-reducing conduction losses at 20 kHz PWM frequencies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side gate driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS21844S	Includes programmable dead-time (0.4–5 µs); higher t_ON/t_OFF (600 ns / 230 ns); single COM ground only	Preferred for designs requiring adjustable dead-time to accommodate varying gate charge or layout parasitics	Select IRS21844S when dead-time tuning is needed; avoid if strict timing matching or dual-ground isolation is required
UCC27211D	600 V floating capability; 4 A peak drive; no integrated level shifter-requires external high-side bias	Suited for space-constrained designs needing higher drive strength but accepting added external components	Choose UCC27211D for higher current drive; use AUIRS21814S when monolithic bootstrap integration and automotive qualification are mandatory

Compared with IRS21844S and UCC27211D, the AUIRS21814S uniquely combines AEC-Q100 qualification, matched propagation delay, and dual-ground architecture-making it optimal for safety-critical automotive motor control where timing integrity and noise immunity are non-negotiable.

Availability

AUIRS21814S is available at Aetrix Electronics and suitable for electric power steering, piezo fuel injection, and starter-alternator control applications requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.

Supply support for AUIRS21814S 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 German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification aligned to ISO/TS 16949.

The AUIRS21814S belongs to Infineon's automotive-grade HVIC gate driver product line, designed specifically for robust half-bridge control in electrified vehicle subsystems including steering, braking, and thermal management.

FAQ

What is the purpose of the separate VSS and COM pins on the AUIRS21814S?

The VSS pin serves as the dedicated logic ground reference for HIN and LIN inputs and internal digital circuitry, while COM is the power ground return for the LO output and level-shifter circuitry. This physical separation minimizes ground bounce coupling from high-current switching into sensitive logic inputs-critical for noise immunity in automotive motor drives.

Can the AUIRS21814S drive IGBTs directly without external components?

Yes-the AUIRS21814S provides 1.9 A source and 2.3 A sink peak output current, sufficient to drive standard 15–30 A IGBTs with gate charge ≤100 nC at 15 V supply. No external gate resistors are required for basic operation, though layout-dependent R_G may still be used for EMI optimization or switching speed tuning.

How does the AUIRS21814S handle negative voltage transients on the VS pin?

The AUIRS21814S tolerates VS transients down to -5 V relative to COM, verified per datasheet Recommended Operating Conditions. Its proprietary HVIC process and internal clamping structures suppress false triggering during inductive kickback events typical in motor phase-leg switching.

Is the AUIRS21814S pin-compatible with the AUIRS2181S?

No-the AUIRS21814S uses a 14-lead narrow-body SOIC package with dedicated VSS and additional pins for enhanced grounding, whereas the AUIRS2181S is an 8-lead SOIC with shared COM/VSS. Pin functions, count, and layout are incompatible; PCB redesign is required for substitution.

AUIRS21814S Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

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):: 1.9A, 2.3A

Input Type:: Inverting

High Side Voltage - Max (Bootstrap):: 600 V

Rise / Fall Time (Typ):: 15ns, 15ns

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

AUIRS21814S FAQ

1.How can I place an order for AUIRS21814S through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIRS21814S 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 AUIRS21814S reliable?

The price and inventory of AUIRS21814S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIRS21814S is usually 5 days.

3.What payment methods are accepted for AUIRS21814S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIRS21814S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIRS21814S?

AUIRS21814S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIRS21814S 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 AUIRS21814S?

For technical support, including AUIRS21814S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIRS21814S requirements.

6.How does Aetrix verify that AUIRS21814S is sourced from the original manufacturer or authorized distributors?

All AUIRS21814S 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 AUIRS21814S meets industry standards.

7.What is the process for return or replacement of AUIRS21814S?

All AUIRS21814S units undergo pre-shipment inspection (PSI). If there is an issue with AUIRS21814S, 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 AUIRS21814S part is unused and in its original packaging.

Return procedure for AUIRS21814S:

1.Submit a request within 90 days.

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

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