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

Infineon Technologies IR21091STRPBF

Name: IR21091STRPBF
Brand: Infineon Technologies
SKU: IR21091STRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR21091STRPBF

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

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

Datasheet:: IR21091STRPBF.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,966

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Product details

Overview

IR21091STRPBF 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 up to +600 V. It features matched 680 ns / 170 ns propagation delays, internal 500 ns dead time (programmable up to 5 µs), 120 mA/250 mA peak output drive capability, and 3.3V/5V/15V logic-compatible inputs. It is used in motor control inverters and DC-DC resonant converters.

For engineers reviewing the IR21091STRPBF datasheet, IR21091STRPBF pinout, IR21091STRPBF application, or IR21091STRPBF equivalent, key selection criteria include floating channel dV/dt immunity, bootstrap-compatible high-side operation, cross-conduction prevention logic, undervoltage lockout on both channels, and programmable dead-time via external resistor.

Technical Context

The IR21091STRPBF integrates a high-voltage level shifter and latch-immune CMOS logic to enable reliable high-side gate driving with VS offset from –5 V to +600 V. Its dual-channel architecture uses independent UVLO thresholds (8.9 V typical) for VCC and VB supplies, and includes pulse filtering to suppress false triggering during fast transients.

It implements cross-conduction prevention via built-in logic that enforces minimum dead time between LO turn-off and HO turn-on (400–680 ns), and supports shutdown via the DT/SD pin with 215–615 ns propagation delay. The HO output is in-phase with IN, while LO is inverted - enabling synchronous buck or half-bridge topologies without external inversion logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Max V_OFFSET	600 V - enables direct high-side switching in 400 V AC line-connected systems
I_O+/I_O−	120 mA / 250 mA - sufficient to drive 1 nF gate capacitance with <100 ns rise/fall times
t_ON/t_OFF (typ)	680 ns / 170 ns - ensures precise timing alignment for PWM frequencies up to 500 kHz
Dead time (internal)	500 ns - prevents shoot-through in half-bridge power stages without external timing components
V_IN logic compatibility	3.3 V / 5 V / 15 V - interfaces directly with microcontrollers, FPGAs, and analog comparators
dV/dt immunity	50 V/ns - maintains stable operation during fast voltage transitions across parasitic impedances
UVLO threshold (VCC/VB)	8.9 V (typ) - avoids erratic switching during brown-out conditions in 12 V or 15 V supply rails

Pinout & Package

IR21091STRPBF is housed in an 8-lead SOIC package (JEDEC MS-012AA), with gull-wing leads, 1.27 mm pitch, and RoHS-compliant lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1: VCC	Low-side and logic supply input	Fixed 10–20 V rail powering internal logic and LO driver stage
2: IN	Logic input for both channels	Single-pin control: HO follows IN; LO is inverted relative to IN
3: DT/SD	Programmable dead-time and shutdown input	Pull to VCC disables both outputs; resistor-to-ground sets dead time (0–5 µs)
4: COM	Low-side return reference	Common ground for VCC, IN, DT/SD, and LO output
5: VB	High-side floating supply input	Connects to bootstrap capacitor positive terminal; referenced to VS
6: HO	High-side gate drive output	Drives N-MOSFET/IGBT gate referenced to VS; in-phase with IN
7: VS	High-side floating supply return	Switch node connection; defines floating reference for HO and VB
8: LO	Low-side gate drive output	Drives N-MOSFET/IGBT gate referenced to COM; inverted relative to IN

Key Features

Feature	Design Value
Floating channel with dV/dt immunity	50 V/ns tolerance enables stable operation in noisy high-di/dt motor drive environments
Matched propagation delays	≤70 ns mismatch between HO and LO paths ensures symmetrical PWM edge placement
Integrated dead-time generation	500 ns fixed minimum prevents shoot-through without external RC networks
3.3V–15V logic compatibility	Eliminates need for level-shifting circuitry when interfacing with modern MCU GPIOs
DT/SD dual-function pin	Single pin provides both programmable dead-time adjustment and hardware shutdown capability

Applications

Motor Control Inverter

Resonant DC-DC Converter

Use Scenario: Driving three-phase BLDC motor using six-step commutation in HVAC blowers.

IC Role / Device Role / Timing Role: Half-bridge driver providing synchronized HO/LO outputs with programmable dead time to prevent shoot-through during phase switching.

Use Value: Internal 500 ns dead time and 600 V rating allow direct integration into 240 V AC-input inverters without auxiliary isolation or timing components.

Use Scenario: Gate driving LLC resonant converter primary-side switches in telecom power supplies.

IC Role / Device Role / Timing Role: High-side/low-side driver delivering precise, matched timing to maintain zero-voltage switching (ZVS) envelope.

Use Value: 680 ns / 170 ns propagation delays and ≤70 ns matching preserve ZVS timing margins across temperature and supply variations.

Solar Microinverter

Industrial UPS Inverter

Use Scenario: Controlling H-bridge in single-phase transformerless solar microinverter with 600 V DC link.

IC Role / Device Role / Timing Role: Isolation-free high-side driver enabling compact, cost-effective topology by eliminating optocouplers or isolated supplies.

Use Value: Bootstrap-compatible floating channel and 600 V max V_OFFSET support direct connection to 600 V DC bus with minimal external components.

Use Scenario: Power stage control in online double-conversion UPS with 400 V DC bus and battery backup.

IC Role / Device Role / Timing Role: Robust gate driver ensuring fail-safe operation under grid disturbance, brown-out, and load transients.

Use Value: Dual UVLO with hysteresis (0.7 V) and DT/SD shutdown provide deterministic fault response without software intervention.

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
IR2104STRPBF	Lacks programmable dead-time; fixed 500 ns only; no DT/SD pin; lower 200 mA IO−	Not suitable where adjustable dead time or hardware shutdown is required	Select when cost-sensitive designs accept fixed timing and omit shutdown functionality
IRS21844STRPBF	Higher 620 mA IO−; integrated bootstrap diode; 100 ns faster t_OFF; no DT/SD pin	Better suited for high-frequency (>1 MHz) resonant topologies requiring faster switching	Select when higher current drive and faster turn-off are critical, and dead-time adjustment is handled externally

Compared with IR2104STRPBF and IRS21844STRPBF, the IR21091STRPBF uniquely combines programmable dead time, hardware shutdown, and matched propagation delays - making it optimal for industrial inverters requiring configurable timing safety and deterministic fault response.

Availability

IR21091STRPBF is available at Aetrix Electronics and suitable for motor control inverters, resonant DC-DC converters, solar microinverters, and industrial UPS inverters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR21091STRPBF 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 9001 and IATF 16949.

The IR21091STRPBF belongs to Infineon's legacy IR family of high-voltage gate drivers, engineered specifically for robust, cost-effective half-bridge power stage control in industrial motor drives and power conversion systems.

FAQ

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

The IR21091STRPBF is rated for 50 V/ns dV/dt at the VS pin under all operating conditions. This specification ensures reliable level-shifting operation even during fast-switching events in hard-switched or resonant topologies. Exceeding this rate may cause false triggering or temporary loss of high-side output, as confirmed in the Absolute Maximum Ratings table (dVS/dt = 50 V/ns).

Can the DT/SD pin be left unconnected?

No - the DT/SD pin must not be left floating. If programmable dead time is not required, it must be tied to VSS/COM through a pull-down resistor (typically 10 kΩ) to ensure default 500 ns dead time and enable normal operation. Leaving it open risks undefined logic states, potential shoot-through, or intermittent shutdown due to noise coupling.

Is a bootstrap diode required externally?

Yes - the IR21091STRPBF does not integrate a bootstrap diode. An external ultrafast recovery diode (e.g., 1N4148W or equivalent) must be placed between VCC and VB to charge the bootstrap capacitor during LO conduction. The diode must support ≥20 V reverse voltage and ≤25 ns reverse recovery time to avoid cross-conduction during high-frequency operation.

What is the recommended minimum bootstrap capacitor value?

A minimum 0.1 µF ceramic capacitor is recommended between VB and VS, with X7R dielectric and 25 V rating. For 20 kHz–100 kHz operation with 1 A gate charge loads, 0.22 µF is preferred to limit voltage droop below the 8.9 V UVLO threshold. Larger values improve stability but increase startup time and reduce available dead-time resolution.

IR21091STRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

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

IR21091STRPBF FAQ

1.How can I place an order for IR21091STRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR21091STRPBF 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 IR21091STRPBF reliable?

The price and inventory of IR21091STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR21091STRPBF is usually 5 days.

3.What payment methods are accepted for IR21091STRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR21091STRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR21091STRPBF?

IR21091STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR21091STRPBF 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 IR21091STRPBF?

For technical support, including IR21091STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR21091STRPBF requirements.

6.How does Aetrix verify that IR21091STRPBF is sourced from the original manufacturer or authorized distributors?

All IR21091STRPBF 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 IR21091STRPBF meets industry standards.

7.What is the process for return or replacement of IR21091STRPBF?

All IR21091STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR21091STRPBF, 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 IR21091STRPBF part is unused and in its original packaging.

Return procedure for IR21091STRPBF:

1.Submit a request within 90 days.

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

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