IRS21091SPBF Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IRS21091SPBF 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 dual synchronous drivers. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. Active alternative parts with equivalent or superior electrical characteristics are available to ensure design continuity.

Substiute Parts

IRS21091SPBF

Infineon TechnologiesIn Stock: 1348IRS21091SPBF 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 IRS21091SPBF are qualified based on strict electrical and mechanical compatibility criteria. The following parameters must match or exceed the original specification to ensure functional equivalence:

• Driven Configuration: Half-Bridge topology
• Number of Drivers: 2 channels
• Gate Type: IGBT and N-Channel MOSFET support
• Supply Voltage Range: Minimum 10V capability (substitutes may extend lower range)
• Logic Input Voltage Levels: VIL and VIH compatibility
• Peak Output Current: Source and sink current ratings must meet or exceed 290mA and 600mA respectively
• Input Logic: Non-Inverting configuration
• Bootstrap Voltage Rating: 600V maximum
• Package: 8-SOIC form factor with identical pinout
• Operating Temperature Range: -40°C to 150°C minimum

The IRS21091STRPBF represents a direct manufacturer equivalent with identical electrical specifications and packaging, differentiated only by tape and reel distribution format. The FAN7080MX-GF085 provides functional substitution with enhanced performance characteristics and automotive-grade qualification.

Parameter Comparison

Engineering Selection Recommendations

The IRS21091STRPBF is the primary substitute for the obsolete IRS21091SPBF. Both parts are manufactured by Infineon Technologies and share identical electrical specifications, operating parameters, and 8-SOIC packaging. The IRS21091STRPBF maintains active product status and is available in higher quantities, making it the direct replacement for existing designs and new implementations requiring the original specification.

The FAN7080MX-GF085 manufactured by onsemi provides an alternative substitution path with enhanced performance characteristics. This device offers improved rise and fall times (40ns and 25ns versus 100ns and 35ns), extended lower supply voltage capability (5.5V minimum versus 10V), and carries AEC-Q100 automotive qualification. The FAN7080MX-GF085 is suitable for applications requiring automotive-grade reliability or where improved switching speed performance is beneficial. The higher moisture sensitivity level (MSL 3 versus MSL 2) requires consideration for storage and handling protocols.

Both substitute parts maintain full compatibility with the original IRS21091SPBF in terms of half-bridge topology, dual-channel synchronous driver configuration, IGBT and N-Channel MOSFET gate drive capability, 600V bootstrap voltage rating, and -40°C to 150°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the IRS21091STRPBF directly replace the IRS21091SPBF in existing designs?

A: Yes. The IRS21091STRPBF is electrically and mechanically identical to the IRS21091SPBF. Both parts feature the same supply voltage range (10V ~ 20V), output current ratings (290mA source, 600mA sink), logic voltage levels, bootstrap voltage rating (600V), and 8-SOIC package. The only difference is packaging format (tube versus tape and reel). No circuit modifications are required.

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

A: The FAN7080MX-GF085 offers faster switching performance with rise and fall times of 40ns and 25ns compared to 100ns and 35ns. It also supports lower supply voltage operation starting at 5.5V versus 10V. The FAN7080MX-GF085 carries AEC-Q100 automotive qualification. However, it has a higher moisture sensitivity level (MSL 3 versus MSL 2), requiring stricter storage conditions. All other electrical parameters and the 8-SOIC package remain compatible.

Q: Are there any pinout differences between these three parts?

A: No. All three parts use the 8-SOIC package with identical pinout. Direct socket substitution is possible without PCB modifications.

Q: Which substitute should I select for a new design?

A: For standard industrial applications, the IRS21091STRPBF is recommended as the direct equivalent. For automotive applications or designs requiring improved switching speed, the FAN7080MX-GF085 is appropriate. Both parts are active products with established supply chains.

Q: Does the FAN7080MX-GF085 require different PCB layout considerations?

A: The faster switching times of the FAN7080MX-GF085 may reduce EMI in some applications but do not require PCB layout changes. The 8-SOIC package footprint is identical. Standard gate driver layout practices apply to both parts.

Q: What is the impact of the different moisture sensitivity levels?

A: The IRS21091STRPBF (MSL 2, 1 Year) allows longer shelf life before moisture absorption becomes a concern. The FAN7080MX-GF085 (MSL 3, 168 Hours) requires baking before reflow if the part has been exposed to ambient humidity for extended periods. This affects component storage and handling procedures but not circuit performance.