Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies AUIR2085STR

Name: AUIR2085STR
Brand: Infineon Technologies
SKU: AUIR2085STR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AUIR2085STR

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AUIR2085STR.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,085

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AUIR2085STR from Infineon Technologies (formerly International Rectifier) is an automotive-grade, self-oscillating half-bridge gate driver IC in SO-8 package, delivering ±1.0A peak output current, 50% fixed duty cycle, and programmable 50–500kHz switching frequency for 48V DC-bus converters. It integrates oscillator, dead-time control (50–200ns), overcurrent protection, and bootstrap-compatible floating high-side channel up to +100Vdc.

For engineers reviewing the AUIR2085STR datasheet, AUIR2085STR pinout, AUIR2085STR application, or AUIR2085STR equivalent, key selection criteria include its AEC-Q100 qualification, ±25ns HO/LO pulse matching, adjustable VCS threshold (150–350mV), internal soft-start behavior (5–50% ramp over ~1000 cycles), and undervoltage lockout thresholds (6.3–7.8V).

Technical Context

The AUIR2085STR implements a primary-side self-oscillating architecture where RT and CT set per-channel frequency and dead time simultaneously; oscillator frequency scales inversely with CT and RT values. Its dual-channel outputs drive complementary MOSFETs with matched propagation delay and built-in dead-time insertion to prevent shoot-through.

Internal soft-start modulates pulse width from 5–10% to 50% over ~1000 cycles at power-up or after overcurrent fault recovery. Undervoltage lockout (UVLO) on both VCC and VB pins ensures safe startup and operation only when supply rails exceed 6.3V (hysteresis = 0.5V).

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Self-oscillating half-bridge driver with integrated 50% duty cycle oscillator
V_OFFSET max	100 V - supports bootstrap operation with VS node up to +100Vdc relative to COM
I_O+/I_O−	±1.0 A - sufficient to drive low-Qg MOSFETs in high-frequency DC-DC stages
f_OSC range	50–500 kHz - set via external RT (10–100kΩ) and CT (47–470pF)
Dead time	50–200 ns - programmable via CT value; prevents simultaneous conduction in half-bridge
Pulse matching	±25 ns - ensures symmetrical timing between HO and LO outputs across full VS range (0–100V)
UVLO thresholds	V_CCUV+ = 7.3V, V_CCUV− = 6.8V - provides 0.5V hysteresis for noise-immune supply monitoring

Pinout & Package

Package: 8-lead SOIC (SO-8), RoHS-compliant, MSL3, AEC-Q100 qualified.

Pin/Terminal	Circuit Role	Design Meaning
COM	Reference ground for low-side circuitry	Return path for VCC, LO, CS, OSC; must be connected to system power ground
VCC	Low-side supply input	Provides 10–15V bias for logic and low-side driver; UVLO active below 6.3V
HO	High-side gate drive output	Floating output referenced to VS; drives high-side MOSFET gate in bootstrap configuration
VS	High-side source return / floating ground	Connects to switch node between high- and low-side MOSFETs; withstands −5V to +100V swing
LO	Low-side gate drive output	Ground-referenced output driving low-side MOSFET gate directly
VB	High-side floating supply input	Bootstrap voltage input (10–15V above VS); powers high-side driver stage
CS	Current sense input	Analog input for overcurrent detection; triggers shutdown when voltage exceeds 150–350mV
OSC	Oscillator timing input	Connects external RT and CT to set f_OSC and dead time; internal oscillator node

Key Features

Feature	Design Value
Integrated oscillator + driver	Eliminates need for external clock generator and level-shifting circuitry in half-bridge designs
Programmable dead time	50–200 ns via single CT capacitor - enables optimization for MOSFET switching speed and layout parasitics
Adjustable overcurrent protection	V_CS threshold range (150–350 mV) allows tuning trip point to match shunt resistor and load requirements
Internal soft-start	Ramps output duty from 5–10% to 50% over ~1000 cycles - prevents inrush current and maintains HO/LO symmetry during startup
AEC-Q100 qualification	Qualified for automotive applications including HEV auxiliary converters and battery management systems

Applications

48V DC-Bus Converter

HEV Auxiliary Power Supply

Use Scenario: Step-down conversion from 48V nominal bus to 12V/5V for infotainment, lighting, and ADAS modules.

IC Role / Device Role / Timing Role: Half-bridge driver controlling synchronous MOSFETs; provides matched HO/LO timing and programmable dead time to minimize conduction loss and EMI.

Use Value: ±25ns pulse matching and 100V offset capability ensure reliable operation under fast transient load steps and bus ripple.

Use Scenario: Isolated auxiliary converter powering 12V systems in hybrid electric vehicles during engine-off battery-only mode.

IC Role / Device Role / Timing Role: Primary-side self-oscillating driver enabling compact, low-component-count topology without external controller or optocoupler feedback.

Use Value: Integrated soft-start and AEC-Q100 qualification guarantee safe, repeatable startup across temperature and battery voltage variation (9–16V).

Battery Management System Converter

Industrial 48V Telecom PSU

Use Scenario: Bidirectional or unidirectional DC-DC stage regulating cell-pack voltage (e.g., 24–58V) to charge/dischage auxiliary batteries.

IC Role / Device Role / Timing Role: Gate driver for half-bridge power stage; uses CS pin for cycle-by-cycle overcurrent limiting during fault conditions.

Use Value: Adjustable V_CS threshold (150–350mV) allows precise current limit setting independent of MOSFET R_DS(on) drift.

Use Scenario: High-efficiency, space-constrained 48V-to-12V intermediate bus converter in telecom base station power shelves.

IC Role / Device Role / Timing Role: Self-timed half-bridge driver reducing BOM count and PCB area versus controller+driver solutions.

Use Value: 500kHz max f_OSC enables use of smaller magnetics and output capacitors while maintaining thermal margin via SO-8 package.

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR2104STRPBF	Non-self-oscillating; requires external PWM input; no integrated oscillator or soft-start	Suitable for systems with existing PWM controller; lacks AEC-Q100 qualification	Choose when external timing control is preferred and automotive qualification is not required
UCC27211D	Higher 4-A peak drive; no integrated oscillator or dead-time control; requires external timing and dead-time circuitry	Used in high-power, high-speed motor drives; not qualified for automotive use	Prefer for >200W applications needing stronger gate drive and faster switching

Compared with IR2104STRPBF and UCC27211D, the AUIR2085STR uniquely combines self-oscillation, automotive qualification, and integrated soft-start-reducing component count and validation effort specifically for 48V distributed power architectures.

Availability

AUIR2085STR is available at Aetrix Electronics and suitable for 48V DC-bus converters, HEV auxiliary power supplies, and battery management system converters requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for AUIR2085STR 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 acquired International Rectifier in 2015 and continues its legacy of high-performance power semiconductors and driver ICs for automotive, industrial, and renewable energy markets.

The AUIR2085STR belongs to Infineon's automotive-grade gate driver product line, designed specifically for robust, low-component-count half-bridge DC-DC conversion in 36–75V distributed power systems.

FAQ

What is the maximum allowable dV/dt on the VS pin?

The AUIR2085STR specifies a maximum allowable offset voltage slew rate of 50 V/ns on the VS pin. Exceeding this may cause false triggering or latch-up due to internal level-shifter limitations. Layout best practices include minimizing trace inductance and using local ceramic decoupling near the VS and COM pins.

How is dead time adjusted, and what is its minimum achievable value?

Dead time is set solely by the external CT capacitor value, ranging from 50 ns (CT = 47 pF) to 200 ns (CT = 470 pF) with RT = 10 kΩ. The minimum dead time of 50 ns is guaranteed under recommended operating conditions and accounts for internal propagation delays and safety margin.

Does the AUIR2085STR support bootstrap operation above 100V?

No. The absolute maximum VB voltage is +150 V, but the recommended steady-state VS offset is limited to 100 V. Operation beyond 100 V violates the Recommended Operating Conditions and risks exceeding internal isolation limits, especially under dV/dt stress or temperature extremes.

Can the CS pin be used for continuous current regulation, or only for fault shutdown?

The CS pin is designed for cycle-by-cycle overcurrent shutdown only-not for closed-loop current regulation. When CS voltage exceeds the threshold (150–350 mV), the device disables both HO and LO outputs for the remainder of that switching cycle and initiates soft-start upon recovery.

AUIR2085STR Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: Half-Bridge

Channel Type:: Synchronous

Number of Drivers:: 2

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 10V ~ 15V

Logic Voltage - VIL, VIH:: -

Current - Peak Output (Source, Sink):: 1A, 1A

Input Type:: RC Input Circuit

High Side Voltage - Max (Bootstrap):: 100 V

Rise / Fall Time (Typ):: 40ns, 20ns

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-904

AUIR2085STR FAQ

1.How can I place an order for AUIR2085STR through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIR2085STR 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 AUIR2085STR reliable?

The price and inventory of AUIR2085STR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIR2085STR is usually 5 days.

3.What payment methods are accepted for AUIR2085STR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIR2085STR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIR2085STR?

AUIR2085STR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIR2085STR 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 AUIR2085STR?

For technical support, including AUIR2085STR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIR2085STR requirements.

6.How does Aetrix verify that AUIR2085STR is sourced from the original manufacturer or authorized distributors?

All AUIR2085STR 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 AUIR2085STR meets industry standards.

7.What is the process for return or replacement of AUIR2085STR?

All AUIR2085STR units undergo pre-shipment inspection (PSI). If there is an issue with AUIR2085STR, 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 AUIR2085STR part is unused and in its original packaging.

Return procedure for AUIR2085STR:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…