IR2125 High-Side Gate Driver IC - Equivalent & Substitute Parts

Part Overview

The IR2125 is a high-side gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET gates in power management applications. The device operates with a supply voltage range of 0V to 18V and features a maximum bootstrap voltage of 500V, making it suitable for high-voltage switching applications.

The IR2125 is classified as obsolete, which necessitates identification of equivalent substitute parts for new designs and ongoing production requirements. The IR2125PBF represents the direct functional equivalent with active product status and improved compliance characteristics.

Substiute Parts

IR2125

Infineon TechnologiesIn Stock: 1419IR2125 Datasheet

Current PartRFQ

IR2125PBF

Infineon TechnologiesIn Stock: 3392IR2125PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR2125 is determined by strict equivalence across the following critical parameters:

• Driven configuration (High-Side)
• Channel type and number of drivers (Single channel, 1 driver)
• Gate type compatibility (IGBT, N-Channel MOSFET)
• Supply voltage range (0V ~ 18V)
• Logic voltage thresholds (VIL 0.8V, VIH 2.2V)
• Peak output current specifications (Source 1.6A, Sink 3.3A)
• Input signal type (Non-Inverting)
• Bootstrap voltage rating (500V maximum)
• Timing characteristics (Rise/Fall times 43ns/26ns)
• Package form factor (8-DIP through-hole)
• Operating temperature range (-40°C ~ 150°C)

The IR2125PBF meets all these criteria as a direct substitute, with identical electrical and mechanical specifications. The primary distinction is product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The IR2125PBF is the direct substitute for the obsolete IR2125. Selection between these parts is determined by application requirements and regulatory constraints:

IR2125PBF is the preferred choice for new designs and production applications. It maintains identical electrical and mechanical specifications while offering active product status, ensuring long-term availability and supply chain stability. The IR2125PBF carries ROHS3 compliance, meeting current environmental and regulatory standards for electronic components in most jurisdictions.

The IR2125 remains available in limited inventory (1364 units) for legacy system maintenance and repair applications where RoHS non-compliance is not a constraint. However, new production should transition to IR2125PBF to ensure compliance with evolving regulatory requirements and to benefit from active manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can IR2125PBF be used as a direct replacement for IR2125 in existing designs?

A: Yes. The IR2125PBF is electrically and mechanically identical to the IR2125. All electrical parameters, timing characteristics, voltage ratings, and current specifications are equivalent. The 8-DIP through-hole package is identical, allowing direct PCB substitution without design modification.

Q: What is the primary difference between IR2125 and IR2125PBF?

A: The IR2125PBF is the active production variant with ROHS3 compliance. The IR2125 is obsolete and RoHS non-compliant. Both devices are functionally equivalent with identical electrical specifications.

Q: Are there any compatibility concerns when switching from IR2125 to IR2125PBF?

A: No compatibility concerns exist. The devices are pin-compatible, electrically equivalent, and operate identically in circuit. No PCB layout, schematic, or firmware modifications are required.

Q: What packaging options are available for IR2125PBF?

A: IR2125PBF is supplied in Tube packaging. The component maintains the 8-DIP (0.300", 7.62mm) through-hole package form factor.

Q: Is IR2125PBF suitable for high-temperature applications?

A: Yes. IR2125PBF operates across the full temperature range of -40°C to 150°C (junction temperature), making it suitable for industrial and automotive high-temperature environments within this specification.

Q: What is the bootstrap voltage rating for IR2125PBF?

A: The maximum bootstrap voltage is 500V, identical to the IR2125. This rating applies to high-side gate driver applications with floating gate drive requirements.