IRS2124SPBF Equivalent & Substitute Parts

Part Overview

The IRS2124SPBF is a high-side gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET devices in power management applications. This component operates with an inverting input configuration and is housed in an 8-SOIC package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

IRS2124SPBF

Infineon TechnologiesIn Stock: 5363IRS2124SPBF Datasheet

Current PartRFQ

IRS25752LTRPBF

Infineon TechnologiesIn Stock: 11430IRS25752LTRPBF Datasheet

MFR RecommendedRFQ

FAN7085M-GF085

onsemiIn Stock: 1872FAN7085M-GF085 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRS2124SPBF is determined by the following critical parameters:

• Driven Configuration: Must be High-Side
• Channel Type: Must be Single
• Number of Drivers: Must be 1
• Gate Type: Must support IGBT and/or N-Channel MOSFET
• Voltage - Supply Range: Must encompass or overlap with 10V ~ 20V
• High Side Voltage - Max (Bootstrap): Must be ≥ 600V
• Operating Temperature Range: Must cover -40°C ~ 150°C minimum
• Mounting Type: Surface Mount
• Input Type Consideration: Inverting input configuration is preferred for direct pin-level compatibility

Two substitute parts meet these criteria with varying degrees of parameter alignment:

FAN7085M-GF085 (onsemi): Maintains identical package format (8-SOIC), inverting input type, and supports both IGBT and N-Channel MOSFET gate types. Supply voltage range (4.5V ~ 20V) encompasses the required 10V ~ 20V window. However, bootstrap voltage maximum is limited to 300V, which is below the 600V specification of the main part.

IRS25752LTRPBF (Infineon Technologies): Operates within the required supply voltage range (10V ~ 18V) and maintains the 600V bootstrap voltage specification. However, this part uses a non-inverting input configuration and is packaged in SOT-23-6 format rather than 8-SOIC, requiring circuit-level design modifications.

Parameter Comparison

Engineering Selection Recommendations

FAN7085M-GF085 is suitable for applications where bootstrap voltage requirements do not exceed 300V. This part maintains package compatibility (8-SOIC) and inverting input logic, minimizing circuit redesign. The part carries AEC-Q100 automotive qualification and ROHS3 compliance. However, the reduced bootstrap voltage specification represents a functional limitation for high-voltage applications.

IRS25752LTRPBF is the preferred substitute for applications requiring the full 600V bootstrap voltage specification. This part is currently in active production status, ensuring long-term availability. ROHS3 compliance and superior moisture sensitivity rating (MSL 1) provide enhanced reliability characteristics. Circuit-level modifications are required due to non-inverting input configuration and different package format (SOT-23-6). Peak output current is reduced to 160mA source and 240mA sink, which may limit applicability in high-current gate drive scenarios.

Frequently Asked Questions (FAQ)

Q: Can FAN7085M-GF085 be used as a direct replacement for IRS2124SPBF?

A: FAN7085M-GF085 provides package-level compatibility (8-SOIC) and maintains inverting input configuration. However, the 300V bootstrap voltage maximum is insufficient for applications requiring 600V operation. Functional substitution is limited to designs operating below 300V bootstrap voltage.

Q: What design changes are required to use IRS25752LTRPBF instead of IRS2124SPBF?

A: IRS25752LTRPBF requires two primary modifications: (1) PCB layout redesign to accommodate SOT-23-6 package instead of 8-SOIC, and (2) signal inversion at the input stage due to non-inverting logic configuration. Peak output current specifications are also reduced, requiring verification against gate charge requirements.

Q: Why is IRS25752LTRPBF recommended despite package differences?

A: IRS25752LTRPBF maintains active production status and meets the full 600V bootstrap voltage requirement. ROHS3 compliance and MSL 1 rating provide superior environmental performance compared to obsolete alternatives. These factors outweigh package redesign requirements for new implementations.

Q: Are there supply voltage compatibility concerns with these substitutes?

A: FAN7085M-GF085 operates from 4.5V minimum, providing broader supply range coverage. IRS25752LTRPBF operates from 10V minimum, matching the original specification. Both parts support the 20V maximum requirement. Verify actual supply voltage in your application against each part's datasheet.

Q: What is the impact of reduced peak output current in IRS25752LTRPBF?

A: IRS25752LTRPBF provides 160mA source and 240mA sink current versus 500mA for both in IRS2124SPBF. This reduction affects gate charge delivery speed and may be unsuitable for high-frequency switching or high-capacitance gate loads. Calculate gate charge requirements (Qg) and verify against available drive current before selection.