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

Infineon Technologies IR21091SPBF

Name: IR21091SPBF
Brand: Infineon Technologies
SKU: IR21091SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR21091SPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

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

Datasheet:: IR21091SPBF.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,086

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Product details

Overview

IR21091SPBF from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC designed to control N-channel MOSFETs or IGBTs in high-side and low-side configurations. It features 600 V floating channel capability, 120 mA/250 mA peak output current (HO/LO), 500 ns internal dead time (programmable up to 5 µs), and 3.3 V/5 V/15 V logic-compatible inputs. It is used in motor control inverters and DC-DC converters requiring robust bootstrap operation.

For engineers reviewing the IR21091SPBF datasheet, IR21091SPBF pinout, IR21091SPBF application, or IR21091SPBF equivalent, key selection criteria include high-side offset voltage tolerance (−0.3 V to +625 V), matched propagation delay (<70 ns), undervoltage lockout thresholds (VCCUV+ = 8.9 V typ.), and dual-function DT/SD pin for simultaneous shutdown and dead-time programming.

Technical Context

The IR21091SPBF integrates a high-voltage level shifter and latch-immune CMOS logic to enable reliable high-side switching up to 600 V with dV/dt immunity. Its floating channel uses proprietary HVIC technology and supports bootstrap supply voltages from 10 V to 20 V.

It implements cross-conduction prevention via internal logic and fixed 500 ns dead time between LO turn-off and HO turn-on, extendable using an external R_DT resistor. The DT/SD pin serves dual roles: setting programmable dead time and forcing immediate shutdown of both outputs when pulled high.

Key Specifications

Parameter	Value and Actual Design Meaning
Max V_OFFSET	600 V - Enables direct high-side drive in bridge topologies operating at bus voltages up to 600 V
I_O+/I_O−	120 mA / 250 mA - Sufficient gate charge delivery for fast turn-on/turn-off of medium-power MOSFETs
t_on/t_off (typ.)	680 ns / 170 ns - Low propagation delay ensures precise timing alignment in PWM-controlled bridges
Dead time	500 ns (internal), up to 5 µs (programmable) - Prevents shoot-through while allowing fine-tuning for specific FET switching characteristics
V_IN logic compatibility	3.3 V, 5 V, 15 V - Interfaces directly with microcontrollers, DSPs, and FPGA I/O without level-shifting circuitry
UVLO thresholds	V_CCUV+ = 8.9 V, V_CCUV− = 8.2 V - Ensures stable operation only within safe gate drive supply range, preventing weak turn-on
Package thermal resistance	R_thJA = 200 °C/W (SOIC-8) - Defines maximum power dissipation limit under still-air conditions for thermal design

Pinout & Package

IR21091SPBF is housed in an 8-lead SOIC package (JEDEC MS-012AA), surface-mount compatible, lead-free (PbF) compliant, with 1.27 mm pitch and 5.00 mm × 4.00 mm body dimensions.

Pin/Terminal	Circuit Role	Design Meaning
1 (V_CC)	Low-side and logic supply input	Provides fixed 10–20 V bias for internal logic and LO driver; referenced to COM
2 (IN)	Logic input	Single-input control signal; HO follows IN phase, LO is inverted; compatible with 3.3 V/5 V logic
3 (DT/SD)	Programmable dead-time & shutdown	Resistor-connected for dead-time tuning; pulled high to disable both HO and LO outputs simultaneously
4 (COM)	Low-side return	Reference node for V_CC, IN, DT/SD, and LO; allows ±5 V ground offset tolerance
5 (V_B)	High-side floating supply	Bootstrap capacitor connection point; supplies gate drive for HO channel
6 (H_O)	High-side gate drive output	Drives gate of high-side N-MOSFET/IGBT; referenced to VS; capable of 120 mA sink/source
7 (V_S)	High-side floating return	Return path for high-side channel; floats with load node; withstands −0.3 V to +625 V vs. COM
8 (L_O)	Low-side gate drive output	Drives gate of low-side N-MOSFET/IGBT; referenced to COM; capable of 250 mA sink/source

Key Features

Feature	Design Value
Floating channel architecture	Enables high-side operation up to 600 V with dV/dt immunity and no external level-shifting components
Matched propagation delay	≤70 ns difference between HO and LO channels ensures symmetrical PWM edge timing critical for bridge balance
Internal 500 ns dead time	Guarantees minimum non-overlap between LO off and HO on, eliminating shoot-through risk without external timing components
Lower di/dt gate driver	Reduces EMI susceptibility during switching transitions by limiting slew rate of gate drive edges
3.3 V logic compatibility	Direct interface with modern low-voltage MCUs and FPGAs without external translators or pull-up networks

Applications

Motor Control Inverter

Industrial DC-DC Converter

Use Scenario: Driving three-phase BLDC motor using six-pack IGBTs in a 400 V DC bus system.

IC Role / Device Role / Timing Role: Half-bridge driver providing synchronized, shoot-through-protected gate signals to upper/lower switches per phase leg.

Use Value: Internal dead time and matched delays ensure precise commutation timing and prevent destructive cross-conduction under varying load transients.

Use Scenario: Isolated bidirectional DC-DC converter with synchronous rectification in telecom power systems.

IC Role / Device Role / Timing Role: Controls high-side and low-side MOSFETs in active-clamp or phase-shifted full-bridge topology.

Use Value: 600 V offset tolerance and bootstrap-ready floating channel support high bus voltage operation without auxiliary supplies.

Solar Microinverter

Appliance Motor Drive

Use Scenario: Single-phase grid-tied microinverter converting PV panel DC output to 230 V AC.

IC Role / Device Role / Timing Role: Gate driver for H-bridge inverter stage, handling MPPT-modulated PWM with tight dead-time control.

Use Value: Programmable dead time (via R_DT) allows optimization for SiC MOSFETs' fast switching, minimizing conduction loss and EMI.

Use Scenario: Variable-speed compressor drive in HVAC systems using sensorless FOC control.

IC Role / Device Role / Timing Role: Half-bridge driver for inverter leg powering permanent magnet motor with 15 kHz PWM carrier.

Use Value: 3.3 V logic compatibility enables direct connection to ARM Cortex-M4 MCU GPIOs, reducing BOM count and layout complexity.

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
IR2104SPBF	Lacks programmable dead time; fixed 500 ns only; no DT/SD pin; lower V_OFFSET rating (600 V same, but reduced noise margin)	Suitable for cost-sensitive, fixed-frequency applications where dead-time tuning is unnecessary	Select when design requires minimal external components and dead-time variation is not required
IRS2005M	Higher peak output current (600 mA/600 mA); integrated bootstrap diode; wider V_CC range (10–25 V); no 3.3 V logic guarantee	Better suited for high-current IGBTs or SiC MOSFETs demanding faster gate charging	Prefer when driving >100 A switches or needing integrated bootstrap diode to reduce PCB area

Compared with IR2104SPBF, IR21091SPBF adds programmable dead time and dual-function DT/SD control; versus IRS2005M, it offers guaranteed 3.3 V logic compatibility and tighter propagation matching-making it optimal for precision motor control with mixed-voltage controllers.

Availability

IR21091SPBF is available at Aetrix Electronics and suitable for motor control inverters, industrial DC-DC converters, solar microinverters, and appliance motor drives requiring stable component supply across production lifecycles.

Supply support for IR21091SPBF 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 to industrial standards.

The IR21091SPBF belongs to Infineon's legacy IR(®) high-voltage gate driver product line, engineered specifically for robust, cost-effective half-bridge control in industrial motor drives and power conversion systems.

FAQ

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

The IR21091SPBF is rated for up to 50 V/ns dV/dt at the VS pin under normal operating conditions. This specification ensures reliable level-shifting performance during fast-switching events in high-frequency bridge applications without false triggering or latch-up.

Can the DT/SD pin be left unconnected?

No. The DT/SD pin must be either grounded (for minimum 500 ns dead time) or connected to a resistor to VSS (to set programmable dead time). Leaving it floating may cause unpredictable dead-time behavior or unintended shutdown due to noise coupling.

Does IR21091SPBF support bootstrap operation with 12 V gate drive?

Yes. The gate drive supply range is 10 V to 20 V, so 12 V is fully supported. A 12 V bootstrap supply provides adequate V_GS for most 600 V N-channel MOSFETs while maintaining margin against V_CC UVLO thresholds and ensuring strong turn-on.

Is there a recommended minimum bootstrap capacitor value?

For typical 20 kHz PWM operation with 1 A gate charge demand, a minimum 0.1 µF ceramic capacitor is recommended. Larger values (e.g., 0.22 µF) improve stability under high-duty-cycle or high-frequency conditions and reduce ripple on the VB node.

IR21091SPBF 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:: Half-Bridge

Channel Type:: Synchronous

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 10V ~ 20V

Logic Voltage - VIL, VIH:: 0.8V, 2.9V

Current - Peak Output (Source, Sink):: 200mA, 350mA

Input Type:: Non-Inverting

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

Rise / Fall Time (Typ):: 150ns, 50ns

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IR21091SPBF FAQ

1.How can I place an order for IR21091SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR21091SPBF 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 IR21091SPBF reliable?

The price and inventory of IR21091SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR21091SPBF is usually 5 days.

3.What payment methods are accepted for IR21091SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR21091SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR21091SPBF?

IR21091SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR21091SPBF 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 IR21091SPBF?

For technical support, including IR21091SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR21091SPBF requirements.

6.How does Aetrix verify that IR21091SPBF is sourced from the original manufacturer or authorized distributors?

All IR21091SPBF 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 IR21091SPBF meets industry standards.

7.What is the process for return or replacement of IR21091SPBF?

All IR21091SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR21091SPBF, 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 IR21091SPBF part is unused and in its original packaging.

Return procedure for IR21091SPBF:

1.Submit a request within 90 days.

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

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