IR21091STRPBF Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR21091STRPBF is a half-bridge gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET configurations in power management applications. This device operates with a supply voltage range of 10V to 20V and features non-inverting input logic with a maximum bootstrap voltage of 600V.

The IR21091STRPBF is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this gate driver topology.

Substiute Parts

IR21091STRPBF

Infineon TechnologiesIn Stock: 30492IR21091STRPBF Datasheet

Current PartRFQ

IRS21091STRPBF

Infineon TechnologiesIn Stock: 9062IRS21091STRPBF Datasheet

MFR RecommendedRFQ

FAN7080MX-GF085

onsemiIn Stock: 5902FAN7080MX-GF085 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IR21091STRPBF are qualified based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Driven Configuration: Half-Bridge topology
• Number of Drivers: 2 channels
• Gate Type: IGBT and N-Channel MOSFET support
• Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
• Input Type: Non-Inverting logic
• High Side Voltage - Max (Bootstrap): 600V minimum
• Operating Temperature Range: -40°C to 150°C (TJ)

Electrical Performance Parameters:

• Voltage - Supply: Minimum 10V compatibility
• Logic Voltage Thresholds: VIL ≤ 0.8V, VIH ≥ 2.5V
• Current - Peak Output: Source ≥ 200mA, Sink ≥ 350mA
• Rise / Fall Time: Performance within application requirements

Substitute parts must maintain compatibility across all core criteria. Variations in electrical performance parameters are acceptable provided they meet or exceed the original specification requirements.

Parameter Comparison

Engineering Selection Recommendations

IRS21091STRPBF (Infineon Technologies)

The IRS21091STRPBF is an active product from Infineon Technologies with identical core specifications to the obsolete IR21091STRPBF. This substitute maintains the same half-bridge topology, 8-SOIC package, and operating temperature range. The IRS21091STRPBF provides improved electrical performance with higher peak output current (290mA source, 600mA sink versus 200mA source, 350mA sink) and faster switching characteristics (100ns rise time, 35ns fall time versus 150ns rise time, 50ns fall time). Both devices maintain ROHS3 compliance and REACH unaffected status. The IRS21091STRPBF is the direct manufacturer-recommended replacement within the Infineon product family.

FAN7080MX-GF085 (onsemi)

The FAN7080MX-GF085 is an active product from onsemi that meets all core compatibility requirements for half-bridge gate driver applications. This substitute maintains the same 8-SOIC package and operating temperature range as the IR21091STRPBF. The FAN7080MX-GF085 extends the supply voltage range to 5.5V minimum (versus 10V minimum) and delivers superior switching performance with 40ns rise time and 25ns fall time. This device carries AEC-Q100 automotive qualification and Automotive grade designation. The FAN7080MX-GF085 is ROHS3 compliant and REACH unaffected. The higher moisture sensitivity level (MSL 3 versus MSL 2) requires consideration for storage and handling protocols.

Frequently Asked Questions (FAQ)

Q: Can the IRS21091STRPBF directly replace the IR21091STRPBF in existing designs?

A: Yes. The IRS21091STRPBF maintains identical core specifications including half-bridge topology, 8-SOIC package, supply voltage range (10V ~ 20V), bootstrap voltage (600V), and operating temperature range (-40°C ~ 150°C). The improved electrical performance characteristics (higher output current and faster switching times) are compatible with applications designed for the IR21091STRPBF.

Q: What are the key differences between the IRS21091STRPBF and FAN7080MX-GF085?

A: Both devices are functionally compatible half-bridge gate drivers in 8-SOIC packages. The FAN7080MX-GF085 offers a lower minimum supply voltage (5.5V versus 10V), faster switching performance (40ns/25ns rise/fall time versus 100ns/35ns), and automotive qualification (AEC-Q100). The IRS21091STRPBF maintains identical supply voltage specifications to the original IR21091STRPBF and is from the same manufacturer family.

Q: Are there package compatibility concerns when substituting these parts?

A: All three devices use the 8-SOIC (0.154", 3.90mm Width) package. Pin-to-pin compatibility is maintained across the IR21091STRPBF, IRS21091STRPBF, and FAN7080MX-GF085 for half-bridge gate driver applications with non-inverting input logic.

Q: What is the impact of the FAN7080MX-GF085 having MSL 3 instead of MSL 2?

A: MSL 3 (168 Hours) requires more stringent moisture control during storage and handling compared to MSL 2 (1 Year). Components must be stored in controlled humidity environments and have reduced shelf life after opening. This affects supply chain logistics and inventory management but does not impact electrical performance or application functionality.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For designs requiring identical electrical specifications to the original IR21091STRPBF, the IRS21091STRPBF is the direct Infineon replacement. For applications benefiting from faster switching performance and automotive qualification, the FAN7080MX-GF085 is suitable. Both devices are active products with established supply availability.

Q: Are all three devices RoHS and REACH compliant?

A: Yes. The IR21091STRPBF, IRS21091STRPBF, and FAN7080MX-GF085 are all ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic component manufacturing and distribution.