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

International Test Instruments Corporation IR21091PBF

Name: IR21091PBF
Brand: International Test Instruments Corporation
SKU: IR21091PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR21091PBF

Manufacturer:: International Test Instruments Corporation

Category:: Gate Drivers

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

Datasheet:: IR21091PBF.pdf

Description:: IR21091 - HALF-BRIDGE DRIVER

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Product details

Overview

IR21091PBF 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 3.3V/5V/15V logic-compatible inputs. It is used in motor control inverters, DC-DC converters, and induction heating systems.

For engineers reviewing the IR21091PBF datasheet, IR21091PBF pinout, IR21091PBF application, or IR21091PBF equivalent, key selection criteria include bootstrap-enabled high-side operation up to +600 V, matched propagation delays (<70 ns mismatch), undervoltage lockout on both channels, and programmable dead-time via external resistor.

Technical Context

The IR21091PBF integrates a high-voltage level shifter and latch-immune CMOS logic to enable robust high-side drive with dV/dt immunity up to 50 V/ns. Its floating channel operates with VS referenced to COM and supports offset voltages from –5 V to +600 V while maintaining logic integrity.

It implements cross-conduction prevention through internal logic and fixed 500 ns dead time between LO turn-off and HO turn-on (and vice versa), extendable to 5 µs using an external R_DT resistor. The DT/SD pin provides synchronous shutdown of both outputs with 215–615 ns propagation delay.

Key Specifications

Parameter	Value and Actual Design Meaning
Max V_OFFSET	600 V - enables direct high-side switching in 400 V AC line-connected topologies
I_O+/I_O−	120 mA / 250 mA - sufficient gate charge delivery for ≤1 A IGBTs or ≤500 V, 20 nC MOSFETs
t_on/t_off (typ.)	680 ns / 170 ns - supports >500 kHz PWM switching with minimal timing skew
Dead time (internal)	500 ns - prevents shoot-through in half-bridge power stages without external timing components
V_CC range	10–20 V - compatible with standard 12 V and 15 V gate drive rails
Logic input compatibility	3.3 V, 5 V, 15 V - interfaces directly with microcontrollers, FPGAs, and isolated gate drivers
UVLO thresholds	V_CC/V_BS UV+ = 8.9 V, UV− = 8.2 V - ensures reliable startup and fault recovery under brownout conditions

Pinout & Package

IR21091PBF is supplied in an 8-lead PDIP package (JEDEC MS-001AB) with through-hole mounting and lead-free finish (PbF). Thermal resistance R_thJA = 125 °C/W at T_A ≤ +25°C.

Pin/Terminal	Circuit Role	Design Meaning
1 (V_CC)	Low-side and logic supply rail	Fixed 10–20 V input powering internal logic and LO driver stage
2 (IN)	Logic input	Single-input control signal; HO follows IN phase, LO is inverted
3 (DT/SD)	Programmable dead-time & shutdown	Resistor-programmed dead time or TTL/CMOS-compatible shutdown trigger
4 (COM)	Low-side return reference	Common ground for V_CC, IN, DT/SD, and LO output
5 (V_B)	High-side floating supply	Bootstrap capacitor connection point for high-side gate drive voltage generation
6 (H_O)	High-side gate drive output	Drives gate of high-side N-MOSFET/IGBT referenced to V_S
7 (V_S)	High-side floating return	Source/emitter node of high-side switch; serves as local ground for H_O
8 (L_O)	Low-side gate drive output	Drives gate of low-side N-MOSFET/IGBT referenced to COM

Key Features

Feature	Design Value
Floating channel architecture	Enables high-side drive up to +600 V with dV/dt immunity of 50 V/ns - critical for bridge-leg reliability in noisy power stages
Matched propagation delay	≤70 ns mismatch between HO and LO paths - minimizes timing skew-induced shoot-through risk
Internal 500 ns dead time	Hardware-enforced minimum off-time eliminates need for external timing logic in basic half-bridge designs
3.3 V logic compatibility	Direct interface with modern low-voltage MCUs and DSPs without level-shifting circuitry
Dual-function DT/SD pin	Single-pin integration of programmable dead-time adjustment and synchronous full-bridge disable - reduces PCB routing complexity

Applications

Motor Control Inverter

Induction Heating System

Use Scenario: Three-phase BLDC or PMSM motor drive using six-pack IGBT module with bootstrap high-side gate drive.

IC Role / Device Role / Timing Role: Half-bridge driver providing synchronized, dead-time-controlled gate signals to upper/lower switches per phase leg.

Use Value: Internal 500 ns dead time and matched propagation delays ensure precise timing alignment across all three legs, reducing torque ripple and EMI.

Use Scenario: Resonant LLC or series-resonant inverter driving induction coil at 20–100 kHz.

IC Role / Device Role / Timing Role: Gate driver for high-frequency IGBT half-bridge with fast turn-on/off and high dV/dt immunity.

Use Value: 50 V/ns dV/dt tolerance prevents false triggering during rapid bus voltage transitions in resonant tank circuits.

Industrial DC-DC Converter

UPS Inverter Stage

Use Scenario: Isolated bidirectional DC-DC converter with dual active bridges operating at 100 kHz.

IC Role / Device Role / Timing Role: High-side and low-side gate driver for primary-side synchronous rectification and secondary-side inversion.

Use Value: 600 V floating capability supports 400 V DC bus operation; 120 mA/250 mA drive strength ensures fast MOSFET switching with low gate charge loss.

Use Scenario: Online UPS with double-conversion topology using IGBT-based inverter stage feeding 230 V AC output.

IC Role / Device Role / Timing Role: Half-bridge driver for inverter leg with integrated UVLO and shutdown protection.

Use Value: Dual-channel UVLO on V_CC and V_BS prevents erratic switching during AC input sags or battery voltage drops.

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
IR2104PBF	Lacks programmable dead time; fixed 500 ns only; no DT/SD pin; lower 600 mA peak output	Suitable for cost-sensitive, non-critical half-bridge designs where dead-time tuning is unnecessary	Select when simplified layout and reduced BOM count outweigh need for adjustable timing or higher drive strength
IRS21844PbF	Includes built-in bootstrap diode; higher 2.5 A peak output; 100 ns faster t_on; wider 10–25 V V_CC range	Preferred for high-current, high-frequency SMPS and servo drives requiring fast switching and integrated bootstrap support	Choose when designing for >10 A load currents or needing integrated bootstrap diode to reduce component count

Compared with IR2104PBF, IR21091PBF adds programmable dead time and stronger drive; versus IRS21844PbF, it trades integrated bootstrap diode and higher current for lower cost and simpler thermal management in industrial motor drives.

Availability

IR21091PBF is available at Aetrix Electronics and suitable for motor control inverters, induction heating systems, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR21091PBF 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 ISO 9001 and IATF 16949.

The IR21091PBF belongs to Infineon's legacy IR (International Rectifier) high-voltage gate driver product line, engineered specifically for ruggedized half-bridge power conversion in industrial motor drives and resonant power supplies.

FAQ

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

The IR21091PBF is rated for dV/dt immunity up to 50 V/ns at the VS pin, verified under test conditions with VB = VS = 600 V. This specification ensures reliable operation during fast-switching transients in high-power half-bridge topologies without false triggering or latch-up.

Can the DT/SD pin be left unconnected?

No - the DT/SD pin must be actively pulled to VSS/COM (for default 500 ns dead time) or to a defined voltage via R_DT (for programmable dead time). Leaving it floating may cause unpredictable dead-time behavior or unintended shutdown due to noise coupling.

Is a bootstrap diode required externally?

Yes - the IR21091PBF does not integrate a bootstrap diode. An external ultrafast or Schottky diode (e.g., 1N4148W or BAS21) must be placed between V_CC and V_B to charge the bootstrap capacitor during LO conduction, enabling high-side drive voltage generation.

Does the device support negative VS voltage during freewheeling?

Yes - the IR21091PBF supports VS down to –5 V relative to COM, allowing safe operation during inductive freewheeling phases where the high-side source/emitter dips below ground. Logic remains functional across this range per Design Tip DT97-3.

IR21091PBF Specifications

Product attributes: Attribute value

Manufacturer:: International Test Instruments Corporation

Series:: -

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

Packaging:: Bulk

Product Status:: Active

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:: Through Hole

Supplier Device Package:: 8-PDIP

IR21091PBF FAQ

1.How can I place an order for IR21091PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR21091PBF 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 IR21091PBF reliable?

The price and inventory of IR21091PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR21091PBF is usually 5 days.

3.What payment methods are accepted for IR21091PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR21091PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR21091PBF?

IR21091PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR21091PBF 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 IR21091PBF?

For technical support, including IR21091PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR21091PBF requirements.

6.How does Aetrix verify that IR21091PBF is sourced from the original manufacturer or authorized distributors?

All IR21091PBF 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 IR21091PBF meets industry standards.

7.What is the process for return or replacement of IR21091PBF?

All IR21091PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR21091PBF, 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 IR21091PBF part is unused and in its original packaging.

Return procedure for IR21091PBF:

1.Submit a request within 90 days.

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

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