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

Infineon Technologies IRS4427PBF

Name: IRS4427PBF
Brand: Infineon Technologies
SKU: IRS4427PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS4427PBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: IRS4427PBF.pdf

Description:: IC GATE DRVR LOW-SIDE 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,539

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Product details

Overview

IRS4427PBF from Infineon Technologies (formerly International Rectifier) is a dual low-side gate driver IC designed to drive power MOSFETs and IGBTs in high-speed switching applications. It features two independent CMOS/Schmitt-triggered inputs, 6–20 V gate drive supply range, matched 50 ns propagation delays per channel, and output currents of 2.3 A (source) / 3.3 A (sink), used in DC-DC converters and motor control half-bridge stages.

For engineers reviewing the IRS4427PBF datasheet, IRS4427PBF pinout, IRS4427PBF application, or IRS4427PBF equivalent, key selection criteria include logic-level compatibility (3.3 V/5 V), dual-channel timing matching, thermal resistance (125 °C/W), industrial-grade qualification, and PDIP-8 through-hole package suitability for prototyping and industrial power supplies.

Technical Context

The IRS4427PBF integrates two independent low-side drivers with latch-immune CMOS technology, enabling robust operation under noisy industrial conditions. Each channel delivers 2.3 A peak source and 3.3 A peak sink current into capacitive loads, with propagation delays tightly matched at 50 ns (typ) and rise/fall times of 25–55 ns.

It operates from a single 6–20 V supply referenced to COM, accepts logic inputs from 0 V to VCC, and maintains rail-to-rail output swing. Input thresholds are VIH ≥ 2.5 V and VIL ≤ 0.8 V, ensuring reliable interfacing with microcontrollers and PWM controllers without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	6 V to 20 V - supports direct connection to common gate-drive rails (e.g., 12 V or 15 V systems) without external regulation
I_O+ / I_O−	2.3 A / 3.3 A - sufficient to rapidly charge/discharge gate capacitance of medium-power MOSFETs (e.g., Qg ≈ 20–40 nC)
t_on/t_off	50 ns (typ) - enables >5 MHz switching frequency capability in hard-switched topologies
Input Compatibility	3.3 V & 5 V CMOS/LSTTL - eliminates need for external logic translators when driven by MCU GPIO or FPGA outputs
R_thJA	125 °C/W - defines maximum power dissipation (1 W at T_A ≤ 25 °C) for thermal design in PDIP-8 PCB layouts
Qualification	JEDEC Industrial Level - validated for continuous operation from −40 °C to +125 °C ambient, suitable for industrial motor drives

Pinout & Package

IRS4427PBF is housed in an 8-pin plastic dual in-line package (PDIP-8) with through-hole mounting. Pin 1 is marked with a notch or dot; pins are numbered counter-clockwise from top-left corner when viewed from top with notch on left.

Pin/Terminal	Circuit Role	Design Meaning
1 (INA)	Channel A input	CMOS/Schmitt-triggered logic input; accepts 0–V_CC signals; no external pull-up required
2 (GND)	Ground reference	Common return for logic inputs, outputs, and supply; must be low-inductance connection to minimize ground bounce
3 (OUTA)	Channel A output	Low-side driver output; sinks up to 3.3 A and sources up to 2.3 A; connects directly to MOSFET gate
4 (V_CC)	Gate drive supply	Single positive supply input (6–20 V); powers both output stages; bypass capacitor recommended near pin
5 (V_CC)	Gate drive supply (redundant)	Dual V_CC pins reduce supply path impedance; both must be connected to same rail
6 (OUTB)	Channel B output	Independent low-side driver output; identical specs to OUTA; enables synchronous dual-switch control
7 (INB)	Channel B input	Independent logic input; phase-aligned with INB; supports separate PWM or enable signals per channel
8 (COM)	Power ground	High-current return path for output stages; separate from logic GND (pin 2) in layout to avoid noise coupling

Key Features

Feature	Design Value
Latch-immune CMOS process	Prevents unintended state changes during ESD or voltage transients-critical for reliability in industrial environments
Matched propagation delay	≤5 ns inter-channel skew (50 ns typ) ensures precise timing alignment in dual-phase or interleaved converter topologies
High peak output current	3.3 A sink capability reduces MOSFET turn-off time, minimizing switching losses in 100 kHz–1 MHz applications
Logic-compatible inputs	No external biasing needed for 3.3 V or 5 V controllers-simplifies interface design and reduces BOM count
Industrial qualification	Validated per JEDEC JESD22-A114/A115 and JESD78-ensures long-term stability in temperature-cycled industrial equipment

Applications

DC-DC Synchronous Buck Converter

Brushless DC Motor Half-Bridge Driver

Use Scenario: Driving high- and low-side N-channel MOSFETs in a 12 V input, 3.3 V/5 V output buck regulator with 500 kHz switching frequency.

IC Role / Device Role / Timing Role: IRS4427PBF controls the low-side switch only; paired with external high-side driver or bootstrap circuit; provides matched timing for dead-time optimization.

Use Value: 50 ns propagation delay matching minimizes shoot-through risk; 3.3 A sink current ensures fast MOSFET turn-off, reducing conduction loss at high load currents.

Use Scenario: Controlling two legs of a 3-phase BLDC inverter using six discrete low-side drivers (three IRS4427PBFs).

IC Role / Device Role / Timing Role: Provides isolated, logic-level-compatible gate drive for each low-side MOSFET; maintains consistent timing across phases to prevent torque ripple.

Use Value: Dual-channel independence allows per-leg PWM modulation; industrial qualification ensures stable operation in motor control enclosures with ambient temperatures up to 125 °C.

Industrial PLC Output Module

LED Constant-Current Driver Stage

Use Scenario: Driving multiple 24 V solenoid or relay loads via external N-MOSFETs in a programmable logic controller backplane.

IC Role / Device Role / Timing Role: Acts as buffered, high-current interface between 3.3 V FPGA I/O and power-stage MOSFETs; handles repetitive inductive kickback safely.

Use Value: Latch-immune process withstands ESD events from field wiring; 125 °C/W thermal resistance allows derated operation in confined chassis without forced air cooling.

Use Scenario: Switching parallel strings of high-brightness LEDs in constant-current mode using external sense-FET topology.

IC Role / Device Role / Timing Role: Drives low-side current-sense FETs in precision LED current regulation loops; supports PWM dimming up to 20 kHz.

Use Value: 2.3 A source current enables rapid gate charging for clean PWM edges; matched delays ensure uniform dimming response across multiple LED channels.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR2110PBF	Includes high-side driver with bootstrap diode; wider V_CC range (10–20 V); higher R_thJA (130 °C/W)	Suitable for half-bridge configurations requiring integrated high-side drive; not pin-compatible	Select when needing self-contained high/low-side control and can accommodate larger footprint and higher thermal resistance
LM5112MYX/NOPB	Single-channel, higher peak current (5 A sink/source); faster t_r/t_f (12 ns); requires dual ICs for two channels	Better suited for ultra-high-frequency (>2 MHz) GaN or SiC gate driving; lacks built-in Schmitt trigger	Choose for advanced wide-bandgap designs where speed outweighs integration and cost; requires external hysteresis for noise immunity

Compared with IR2110PBF, IRS4427PBF offers simpler dual low-side control with lower thermal resistance and inherent noise immunity; versus LM5112MYX/NOPB, it trades raw speed for integration, logic compatibility, and industrial qualification-making it optimal for cost-sensitive, noise-prone 100–500 kHz industrial power stages.

Availability

IRS4427PBF is available at Aetrix Electronics and suitable for DC-DC converters, brushless DC motor drives, and industrial PLC output modules requiring stable component supply and long-lifecycle support.

Supply support for IRS4427PBF 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 industrial, automotive, and renewable energy systems.

The IRS4427PBF belongs to Infineon's legacy gate driver product line, engineered specifically for ruggedized, cost-effective low-side switching in industrial power conversion and motor control applications.

FAQ

Can IRS4427PBF drive high-side N-channel MOSFETs?

No. IRS4427PBF is a dedicated dual low-side driver with outputs referenced to COM (power ground). It lacks high-side floating supply capability or level-shifting circuitry. To drive high-side N-MOSFETs, use a bootstrap-based driver like IR2110 or add an isolated gate driver stage.

What is the maximum safe operating frequency when driving a 10 nF gate load?

With 50 ns typical propagation delay and 25–55 ns rise/fall times, IRS4427PBF supports reliable operation up to ~1 MHz for moderate gate charges. For a 10 nF load, switching losses increase significantly above 500 kHz; thermal limits (1 W max at 25 °C) require careful PCB copper area and airflow management.

Is the PDIP-8 package RoHS compliant and lead-free?

Yes. IRS4427PBF is explicitly marked "Leadfree, RoHS compliant" in the official datasheet. The PDIP-8 package uses matte tin plating over copper leads and meets EU RoHS Directive 2011/65/EU requirements, including Pb content < 0.1 wt%.

How should COM and GND pins be routed on the PCB?

COM (pin 8) carries high pulsed output currents and must connect directly to the power ground plane with minimal trace length and width. GND (pin 2) serves logic reference and should tie to the digital ground plane, then join COM at a single-point star ground near the device to prevent noise coupling into input signals.

IRS4427PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: Low-Side

Channel Type:: Independent

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 6V ~ 20V

Logic Voltage - VIL, VIH:: 0.8V, 2.5V

Current - Peak Output (Source, Sink):: 2.3A, 3.3A

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 25ns, 25ns

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-PDIP

IRS4427PBF FAQ

1.How can I place an order for IRS4427PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS4427PBF 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 IRS4427PBF reliable?

The price and inventory of IRS4427PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS4427PBF is usually 5 days.

3.What payment methods are accepted for IRS4427PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS4427PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS4427PBF?

IRS4427PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS4427PBF 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 IRS4427PBF?

For technical support, including IRS4427PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS4427PBF requirements.

6.How does Aetrix verify that IRS4427PBF is sourced from the original manufacturer or authorized distributors?

All IRS4427PBF 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 IRS4427PBF meets industry standards.

7.What is the process for return or replacement of IRS4427PBF?

All IRS4427PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS4427PBF, 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 IRS4427PBF part is unused and in its original packaging.

Return procedure for IRS4427PBF:

1.Submit a request within 90 days.

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

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