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

Infineon Technologies IRS21084SPBF

Name: IRS21084SPBF
Brand: Infineon Technologies
SKU: IRS21084SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS21084SPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

Package:: -

Datasheet:: IRS21084SPBF.pdf

Description:: IRS21084 - GATE DRIVER

Quantity:: RFQ Add To RFQ list

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Inventory:5,310

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Product details

Overview

IRS21084SPBF 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 channels, 540 ns internal deadtime, 3.3 V/5 V/15 V logic compatibility, and programmable deadtime via external R_DT. It enables robust motor control inverters and SMPS power stages.

For engineers reviewing the IRS21084SPBF datasheet, IRS21084SPBF pinout, IRS21084SPBF application, or IRS21084SPBF equivalent, key selection criteria include floating channel dV/dt immunity (50 V/ns), matched propagation delay (≤30 ns), undervoltage lockout thresholds (V_CCUV+ = 8.9 V typ), and SOIC-14 package thermal resistance (120 °C/W).

Technical Context

The IRS21084SPBF integrates a high-voltage level shifter for the floating high-side channel and separate logic-level inputs (HIN/LIN) with cross-conduction prevention logic. Its internal 540 ns deadtime is fixed but extendable to 5 µs using an external resistor on the DT pin referenced to VSS.

It employs latch-immune CMOS and proprietary HVIC technology for monolithic ruggedness, supports bootstrap operation for high-side drive, and maintains logic functionality across VS from –5 V to +600 V with ±5 V logic/power ground offset tolerance.

Key Specifications

Parameter	Value and Actual Design Meaning
Max VB	+600 V - absolute high-side floating supply voltage limit, enabling direct drive of 600 V-class power switches
Deadtime (internal)	540 ns - fixed minimum delay between LO turn-off and HO turn-on to prevent shoot-through
Propagation delay match	≤30 ns - \|t_on − t_off\| ensures precise timing alignment between channels for balanced bridge switching
V_CC range	10–20 V - gate drive supply range compatible with standard 12 V/15 V bias rails
dV/dt immunity	50 V/ns - withstands fast transient voltage spikes on VS without false triggering
Logic compatibility	3.3 V / 5 V / 15 V - accepts TTL/CMOS logic levels without level-shifting circuitry
UVLO threshold	V_CCUV+ = 8.9 V (typ) - prevents output activation until gate supply reaches safe operating level

Pinout & Package

IRS21084SPBF is housed in a 14-lead SOIC package with exposed pad for enhanced thermal performance and surface-mount compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (VCC)	Low-side and logic supply input	Provides power for internal logic and low-side driver stage; must be decoupled near pin
2 (HIN)	High-side logic input	In-phase control signal for HO output; referenced to VSS, not COM
3 (LIN)	Low-side logic input	Out-of-phase control signal for LO output; referenced to VSS
4 (DT)	Programmable deadtime adjustment	Connects external R_DT to VSS to scale deadtime up to 5 µs; absent in IRS2108 variant
5 (VSS)	Logic ground reference	Dedicated logic return node-separate from COM-to support ±5 V offset tolerance
6 (COM)	Low-side output return	Reference for LO output and internal UVLO comparators; tied to system power ground
7 (LO)	Low-side gate driver output	Sinks/sourcing capable output driving N-MOSFET/IGBT gate; rated for 600 mA peak
8 (VB)	High-side floating supply	Bootstrap or isolated supply input for high-side driver stage; referenced to VS
9 (HO)	High-side gate driver output	Drives high-side switch gate; operates referenced to VS, not COM
10 (VS)	High-side floating return	Source/emitter node of high-side power device; serves as local ground for HO/VB circuitry

Key Features

Feature	Design Value
Floating channel architecture	Enables bootstrap-based high-side drive up to +600 V without auxiliary isolated supplies
Programmable deadtime	Single external resistor (R_DT) extends internal 540 ns deadtime to 5 µs for optimized EMI/noise trade-offs
Matched propagation delays	≤30 ns skew between HO and LO ensures symmetrical switching transitions in half-bridge topologies
Independent logic and power grounds	VSS and COM separation allows ±5 V offset-critical for noise-resilient PCB layout in high-dV/dt environments
Integrated shoot-through prevention	Hardware-enforced interlock logic blocks simultaneous HO/LO activation even during input glitches

Applications

Motor Control Inverter

Industrial SMPS

Use Scenario: Driving three-phase BLDC or PMSM motors in HVAC compressors and industrial pumps.

IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized, deadtime-controlled HO/LO outputs to power MOSFETs in each leg.

Use Value: Matched propagation delays and 50 V/ns dV/dt immunity ensure clean commutation under high bus transients and load variations.

Use Scenario: Controlling primary-side synchronous rectifiers and secondary-side LLC resonant converters.

IC Role / Device Role / Timing Role: High-side/low-side driver delivering precise gate timing for zero-voltage switching (ZVS) operation.

Use Value: Programmable deadtime allows fine-tuning for optimal ZVS window across line/load conditions without firmware changes.

UPS Power Stage

EV Onboard Charger

Use Scenario: Bidirectional DC-AC inversion and AC-DC rectification in online double-conversion UPS systems.

IC Role / Device Role / Timing Role: Dual-channel driver managing both inverter and rectifier bridges with shared control logic.

Use Value: Independent VSS/COM grounding minimizes ground bounce coupling between control and power domains during mode switching.

Use Scenario: Driving SiC MOSFETs in the AC/DC front-end and DC/DC isolation stage of EV onboard chargers.

IC Role / Device Role / Timing Role: High-speed gate driver supporting >100 kHz switching with low propagation delay variation over temperature.

Use Value: 220 ns typical t_on and <30 ns delay matching enable tight PWM resolution and reduced current ripple at elevated frequencies.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS2108SPBF	No DT pin or VSS terminal; fixed 540 ns deadtime only; 8-lead SOIC/ PDIP	Lacks programmable deadtime and separate logic ground-unsuitable where adaptive timing or noise-sensitive layout is required	Select when board space is constrained and deadtime is fixed by design
IR2110SPBF	Higher V_B rating (+625 V); no programmable deadtime; 14-lead PDIP/SOIC; no VSS pin	Wider voltage margin but lacks DT/VSS features-better for legacy 600 V+ designs with simpler timing needs	Select when maximum voltage headroom is critical and deadtime tuning is unnecessary

Compared with IRS2108SPBF and IR2110SPBF, the IRS21084SPBF uniquely combines programmable deadtime, dedicated VSS logic ground, and matched propagation delay in a 14-lead SOIC-making it optimal for noise-critical, high-frequency half-bridge systems requiring layout flexibility and timing adaptability.

Availability

IRS21084SPBF is available at Aetrix Electronics and suitable for motor control inverters, industrial SMPS, UPS power stages, and EV onboard chargers requiring stable component supply and long-term production continuity.

Supply support for IRS21084SPBF 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 leadership in high-voltage gate drivers and silicon carbide solutions.

The IRS21084SPBF belongs to Infineon's high-voltage IC (HVIC) driver family, engineered specifically for reliable half-bridge switching in demanding industrial and energy infrastructure applications where dV/dt immunity and timing precision are critical.

FAQ

What is the purpose of the VSS pin on the IRS21084SPBF?

VSS is the dedicated logic ground reference, electrically isolated from COM (power ground). This separation enables ±5 V offset tolerance between logic and power domains, reducing noise coupling in high-dV/dt layouts and improving immunity to ground bounce during switching transitions.

Can the IRS21084SPBF drive SiC MOSFETs?

Yes-the IRS21084SPBF supports gate drive supply voltages from 10 V to 20 V and delivers 290 mA (typ) high-side and 600 mA (typ) low-side peak output current, meeting typical SiC gate requirements. Its 220 ns t_on and 35 ns t_f enable efficient >100 kHz operation with minimal switching loss.

How is deadtime adjusted using the DT pin?

The DT pin connects to an external resistor (R_DT) tied to VSS. With R_DT = 0 Ω, deadtime remains at the internal 540 ns value. Increasing R_DT linearly scales deadtime up to 5 µs; a 200 kΩ resistor yields ~5 µs, per the datasheet's R_DT vs. DT curve.

Does the IRS21084SPBF require external bootstrap diodes and capacitors?

Yes-bootstrap operation for the high-side channel requires an external diode (e.g., UF4007) and capacitor (typically 0.1–1 µF ceramic + 10 µF electrolytic) between VB and VS. The IC does not integrate these components; proper sizing is essential for maintaining V_BS during duty cycles >95%.

IRS21084SPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Programmable:: -

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:: -

Supplier Device Package:: -

IRS21084SPBF FAQ

1.How can I place an order for IRS21084SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS21084SPBF 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 IRS21084SPBF reliable?

The price and inventory of IRS21084SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS21084SPBF is usually 5 days.

3.What payment methods are accepted for IRS21084SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS21084SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS21084SPBF?

IRS21084SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS21084SPBF 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 IRS21084SPBF?

For technical support, including IRS21084SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS21084SPBF requirements.

6.How does Aetrix verify that IRS21084SPBF is sourced from the original manufacturer or authorized distributors?

All IRS21084SPBF 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 IRS21084SPBF meets industry standards.

7.What is the process for return or replacement of IRS21084SPBF?

All IRS21084SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS21084SPBF, 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 IRS21084SPBF part is unused and in its original packaging.

Return procedure for IRS21084SPBF:

1.Submit a request within 90 days.

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

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