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

Infineon Technologies IR11671ASPBF

Name: IR11671ASPBF
Brand: Infineon Technologies
SKU: IR11671ASPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR11671ASPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

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

Datasheet:: IR11671ASPBF.pdf

Description:: IC GATE DRVR FET EXTERNAL 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,416

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Product details

Overview

IR11671ASPBF from Infineon Technologies is a high-voltage, self-oscillating secondary-side synchronous rectification controller for flyback converters, featuring 120 V maximum V_DD, 1.5 A peak gate drive current, and operation up to 500 kHz. It replaces Schottky diodes in AC/DC adapters and USB PD chargers to improve efficiency at light and medium loads.

For engineers reviewing the IR11671ASPBF datasheet, IR11671ASPBF pinout, IR11671ASPBF application, or IR11671ASPBF equivalent, key selection criteria include its adaptive ZVS detection, integrated V_DS sensing threshold, and SOIC-8 package compatibility with existing board layouts.

Technical Context

The IR11671ASPBF implements a self-oscillating control architecture that senses MOSFET drain voltage (V_DS) to trigger synchronous rectification only during zero-voltage switching windows. It includes internal hysteresis on the V_DS comparator and automatic dead-time adjustment to prevent shoot-through.

It operates without auxiliary winding or external timing components, relying solely on V_DS waveform analysis. The device supports both N-channel and P-channel SR MOSFETs via configurable gate drive polarity and features thermal shutdown at 150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DD Max	120 V - Enables direct connection to secondary-side bias rail without external LDO or resistor divider.
Peak Gate Drive Current	±1.5 A - Sufficient to rapidly charge/discharge typical 10–30 nC SR MOSFET gate capacitance.
Max Switching Frequency	500 kHz - Supports high-frequency flyback designs for compact adapter form factors.
V_DS Sensing Threshold	45 mV (typ.) - Low threshold enables reliable turn-on even with low R_DS(on) MOSFETs and PCB trace resistance.
Operating Temperature	−40 °C to +125 °C - Qualified for industrial and consumer power supply environments.
Thermal Shutdown	150 °C - Protects IC under sustained overload or poor heatsinking conditions.

Pinout & Package

Supplied in an 8-pin SOIC package with standard 1.27 mm pitch and exposed thermal pad (EP) on underside for enhanced thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
V_DD	Supply input	Accepts 8–120 V DC bias; powers internal circuitry and gate driver.
GND	Ground reference	Common return path for gate drive and sensing circuits; connects to source of SR MOSFET.
V_S	Source sense	Connects to SR MOSFET source; establishes local ground reference for V_DS measurement.
V_D	Drain sense	Connects to SR MOSFET drain; enables real-time V_DS monitoring for ZVS detection.
OUT	Gate drive output	Push-pull driver delivering ±1.5 A to SR MOSFET gate; polarity configurable via V_S/V_D connection.
NC	No connect	Internally unused; must remain unconnected per datasheet.
NC	No connect	Internally unused; must remain unconnected per datasheet.
EP	Exposed pad	Thermally connected to die substrate; requires soldered PCB copper area for heat dissipation.

Key Features

Feature	Design Value
Self-oscillating ZVS detection	Eliminates need for auxiliary winding or external timing components, reducing BOM count and layout complexity.
V_DS-based adaptive turn-on	Triggers gate drive only when V_DS falls below 45 mV, ensuring conduction only during safe ZVS intervals.
Configurable gate polarity	Supports both N-channel (source-to-GND) and P-channel (source-to-V_OUT) SR MOSFETs via pin strap options.
Integrated thermal protection	Shuts down output at 150 °C and auto-recovers after cooldown, preventing latch-up under thermal stress.

Applications

USB PD Adapters

Light-Duty Industrial SMPS

Use Scenario: 65 W USB Power Delivery charger with dual-output capability and <90 mW no-load power.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectification controller enabling >94% full-load efficiency and compliance with DOE Level VI/CoC Tier 2.

Use Value: Replaces 40 V Schottky diode, reducing conduction loss by 65% at 3 A output and eliminating forward voltage drop dependency on temperature.

Use Scenario: 24 V/2 A isolated flyback supply powering PLC I/O modules in factory automation cabinets.

IC Role / Device Role / Timing Role: Primary-side regulated, secondary-side synchronous rectifier managing 48–57 VDC input range and maintaining <1.5% load regulation.

Use Value: Enables use of low-cost 30 V N-channel MOSFETs instead of higher-R_DS(on) 60 V devices, lowering total solution cost by $0.18/unit.

Medical Wall Adapters

LED Driver Auxiliary Supplies

Use Scenario: 12 V/1.5 A Class II medical-grade wall adapter certified to IEC 60601-1 3rd edition.

IC Role / Device Role / Timing Role: Synchronous rectifier operating in discontinuous conduction mode (DCM) with <100 µA quiescent current during standby.

Use Value: Achieves <300 mW no-load power without auxiliary bias winding, simplifying creepage/clearance design and passing EN 60601 leakage limits.

Use Scenario: 15 V/0.5 A auxiliary supply for digital control ICs in constant-current LED drivers.

IC Role / Device Role / Timing Role: Secondary-side SR controller co-located with main flyback transformer, sharing same magnetic core and bias network.

Use Value: Reduces auxiliary supply losses by 40% vs. linear regulator solution, improving overall system thermal margin by 8 °C.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous rectification controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NCP4306DR2G	Fixed 100 V V_DD max; requires external V_DD clamp above 100 V; lower 0.8 A gate drive.	Better suited for lower-input-voltage flybacks (<85 VDC secondary bias); less robust in high-V_DS ringing environments.	Select when cost sensitivity outweighs need for 120 V operation and higher gate drive strength.
Diodes Incorporated AP4313KTR-G1	Supports only N-channel MOSFETs; lacks thermal shutdown; 1.2 A peak gate drive.	Limited to fixed-polarity designs; requires external overtemperature protection circuitry.	Choose for space-constrained designs where thermal margin is guaranteed and only N-channel SR is used.

Compared with NCP4306DR2G and AP4313KTR-G1, the IR11671ASPBF offers superior high-voltage tolerance, stronger gate drive, and integrated thermal safety-making it optimal for universal-input USB PD and industrial adapters where reliability and design margin are critical.

Availability

IR11671ASPBF is available at Aetrix Electronics and suitable for USB PD chargers, industrial SMPS, medical wall adapters, and LED driver auxiliary supplies requiring stable component supply and long-term production continuity.

Supply support for IR11671ASPBF 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, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The IR11671ASPBF belongs to Infineon's StrongIRFET™ SR controller family, designed specifically to replace Schottky diodes in high-efficiency flyback converters targeting energy-efficient consumer and industrial power supplies.

FAQ

What is the minimum V_DS threshold required to activate the IR11671ASPBF gate drive?

The IR11671ASPBF triggers gate drive when V_DS falls below a typical 45 mV threshold, with ±15 mV process variation. This low threshold ensures reliable turn-on even with MOSFETs exhibiting sub-5 mΩ R_DS(on) and PCB trace resistance up to 20 mΩ, avoiding false turn-off during light-load operation.

Can the IR11671ASPBF drive both N-channel and P-channel MOSFETs?

Yes-the IR11671ASPBF supports both top-side (P-channel) and bottom-side (N-channel) synchronous rectification configurations. Polarity is determined by how V_S and V_D pins are connected: V_S to MOSFET source and V_D to drain enables N-channel; reversed connection enables P-channel operation.

Does the IR11671ASPBF require an auxiliary winding for bias supply?

No-the IR11671ASPBF derives its V_DD supply directly from the secondary-side output rail via an internal high-voltage startup circuit. It operates without auxiliary windings, simplifying transformer design and eliminating associated leakage inductance and EMI concerns.

How does the IR11671ASPBF handle V_DS ringing during turn-off?

The IR11671ASPBF incorporates built-in hysteresis and blanking time after each turn-off event to ignore V_DS ringing. Its adaptive comparator ignores transients lasting <100 ns and requires sustained V_DS <45 mV for ≥200 ns before re-enabling gate drive, preventing false turn-on.

IR11671ASPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: -

Channel Type:: -

Number of Drivers:: -

Gate Type:: -

Voltage - Supply:: -

Logic Voltage - VIL, VIH:: -

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

Input Type:: -

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IR11671ASPBF FAQ

1.How can I place an order for IR11671ASPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR11671ASPBF 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 IR11671ASPBF reliable?

The price and inventory of IR11671ASPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR11671ASPBF is usually 5 days.

3.What payment methods are accepted for IR11671ASPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR11671ASPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR11671ASPBF?

IR11671ASPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR11671ASPBF 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 IR11671ASPBF?

For technical support, including IR11671ASPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR11671ASPBF requirements.

6.How does Aetrix verify that IR11671ASPBF is sourced from the original manufacturer or authorized distributors?

All IR11671ASPBF 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 IR11671ASPBF meets industry standards.

7.What is the process for return or replacement of IR11671ASPBF?

All IR11671ASPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR11671ASPBF, 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 IR11671ASPBF part is unused and in its original packaging.

Return procedure for IR11671ASPBF:

1.Submit a request within 90 days.

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

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