IRS2124STRPBF Equivalent & Substitute Parts

Part Overview

The IRS2124STRPBF 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 packaged in an 8-SOIC surface mount package. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

IRS2124STRPBF

Infineon TechnologiesIn Stock: 12748IRS2124STRPBF Datasheet

Current PartRFQ

IRS25752LTRPBF

Infineon TechnologiesIn Stock: 11430IRS25752LTRPBF Datasheet

MFR RecommendedRFQ

FAN7085MX-GF085

onsemiIn Stock: 35305FAN7085MX-GF085 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRS2124STRPBF is determined by the following critical parameters:

• Driven Configuration: Must be High-Side
• Channel Type: Must be Single
• Gate Type: Must support IGBT and/or N-Channel MOSFET
• Input Type: Inverting configuration preferred for direct functional replacement
• Voltage - Supply Range: Must encompass or exceed 10V ~ 20V
• Current - Peak Output: Must meet or exceed 500mA source and sink capability
• High Side Voltage - Max (Bootstrap): Must support minimum 600 V
• Operating Temperature Range: Must cover -40°C ~ 150°C
• Package / Case: 8-SOIC form factor for PCB compatibility

Two substitute parts are identified based on these parameters. The FAN7085MX-GF085 maintains identical package geometry and inverting input configuration. The IRS25752LTRPBF offers an alternative from the same manufacturer with different packaging and input logic, requiring design evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

FAN7085MX-GF085 is the primary substitute candidate. It maintains identical package geometry (8-SOIC), matching inverting input logic, and equivalent operating temperature range. Peak output current is slightly reduced (450mA vs. 500mA), which may be acceptable depending on gate drive requirements. The bootstrap voltage maximum is reduced to 300 V, which represents a significant limitation for applications requiring 600 V operation. This part carries AEC-Q100 automotive qualification and ROHS3 compliance, indicating active production status and modern manufacturing standards.

IRS25752LTRPBF is a secondary alternative from Infineon Technologies with active product status. It maintains the 600 V bootstrap voltage specification and offers superior moisture sensitivity characteristics (MSL 1 vs. MSL 3). However, this part uses non-inverting input logic, requiring circuit redesign or additional signal conditioning. Peak output current is substantially lower (160mA source, 240mA sink), making it unsuitable for high-current gate drive applications. The SOT-23-6 package differs from the original 8-SOIC form factor, necessitating PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can FAN7085MX-GF085 directly replace IRS2124STRPBF without circuit modification?

A: FAN7085MX-GF085 maintains identical package geometry and inverting input configuration, enabling direct PCB substitution. However, the reduced bootstrap voltage maximum (300 V vs. 600 V) must be evaluated against your application's high-side voltage requirements. Peak output current is reduced by 50mA per channel, which may impact gate drive speed in high-frequency switching applications.

Q: Why is IRS25752LTRPBF listed as a substitute if it has non-inverting logic?

A: IRS25752LTRPBF is identified as a functional alternative based on high-side gate driver classification and active product status. The non-inverting input configuration requires circuit redesign, including signal inversion at the driver input. This part is suitable only for new designs or applications where input logic modification is feasible.

Q: What are the implications of the different package types?

A: IRS2124STRPBF and FAN7085MX-GF085 both use 8-SOIC packaging with identical physical dimensions, allowing direct PCB substitution without layout changes. IRS25752LTRPBF uses SOT-23-6 packaging, which is physically smaller and requires PCB redesign, including new footprint layout and trace routing.

Q: How do the peak output current specifications affect gate drive performance?

A: Peak output current determines gate charge delivery speed and switching frequency capability. IRS2124STRPBF and FAN7085MX-GF085 both provide 450-500mA output, suitable for standard IGBT and MOSFET gate drive applications. IRS25752LTRPBF provides only 160mA source and 240mA sink, limiting switching frequency and gate charge delivery rate, making it unsuitable for high-speed switching applications.

Q: What compliance and qualification differences exist between these parts?

A: FAN7085MX-GF085 carries AEC-Q100 automotive qualification and ROHS3 compliance, indicating suitability for automotive and regulated applications. IRS25752LTRPBF provides ROHS3 compliance and superior moisture sensitivity (MSL 1), beneficial for high-humidity storage and assembly environments. Original IRS2124STRPBF specifications do not include automotive qualification data.

Q: Are there supply voltage range limitations to consider?

A: IRS2124STRPBF operates at 10V ~ 20V. FAN7085MX-GF085 extends the lower limit to 4.5V, providing greater flexibility for low-voltage applications. IRS25752LTRPBF operates at 10V ~ 18V, slightly reducing the upper voltage limit. Verify your application's supply voltage against each part's specified range.