IR2109S Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR2109S is a half-bridge gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET configurations in power management applications. The device operates with a supply voltage range of 10V to 20V and provides synchronized dual-channel gate driving with non-inverting input logic.

The IR2109S is classified as obsolete, which necessitates identification of active alternative components that maintain electrical and mechanical compatibility. Substitute parts must preserve the half-bridge topology, synchronous channel configuration, and 8-SOIC package format while meeting or exceeding the original performance specifications.

Substiute Parts

IR2109S

Infineon TechnologiesIn Stock: 9678IR2109S Datasheet

Current PartRFQ

IR2109SPBF

International RectifierIn Stock: 2339IR2109SPBF Datasheet

DirectRFQ

FAN7080MX-GF085

onsemiIn Stock: 5902FAN7080MX-GF085 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IR2109S is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Driven Configuration: Half-Bridge (mandatory)
• Channel Type: Synchronous (mandatory)
• Number of Drivers: 2 (mandatory)
• Gate Type: IGBT, N-Channel MOSFET (mandatory)
• Input Type: Non-Inverting (mandatory)
• Package / Case: 8-SOIC (mandatory)
• High Side Voltage - Max (Bootstrap): 600V minimum (mandatory)

Allowable Parameter Ranges for Substitution:

• Voltage - Supply: Must encompass or exceed 10V ~ 20V range
• Logic Voltage - VIL, VIH: Must be compatible with 0.8V, 2.9V or lower thresholds
• Current - Peak Output (Source, Sink): Must meet or exceed 200mA source, 350mA sink
• Rise / Fall Time: May be faster than original specifications
• Operating Temperature: Must support -40°C ~ 150°C (TJ) range

Substitute parts identified in this reference maintain all mandatory parameters while potentially offering enhanced performance in current delivery, switching speed, or supply voltage flexibility.

Parameter Comparison

Engineering Selection Recommendations

IR2109SPBF (Direct Substitute)

The IR2109SPBF maintains identical electrical specifications to the IR2109S across all critical parameters: supply voltage range, logic thresholds, peak output current, bootstrap voltage, and switching characteristics. Both devices share the same base product number (IR2109) and 8-SOIC package format. The IR2109SPBF is currently in active production status, making it the direct functional replacement for obsolete IR2109S applications. This substitute is suitable for designs requiring pin-for-pin compatibility without performance modification.

FAN7080MX-GF085 (Recommended Substitute)

The FAN7080MX-GF085 is classified as a manufacturer-recommended substitute and offers enhanced performance characteristics while maintaining all mandatory compatibility parameters. Key advantages include:

• Extended supply voltage range (5.5V ~ 20V vs. 10V ~ 20V), providing greater design flexibility
• Increased peak output current (300mA source, 600mA sink vs. 200mA, 350mA), enabling higher gate charge delivery rates
• Faster switching characteristics (40ns rise, 25ns fall vs. 150ns, 50ns), reducing switching losses in power conversion stages
• ROHS3 compliance and AEC-Q100 automotive qualification, meeting modern regulatory and quality standards

The FAN7080MX-GF085 is supplied in Tape & Reel packaging and maintains the identical 8-SOIC form factor. This substitute is appropriate for new designs or redesigns where enhanced performance and regulatory compliance are required.

Frequently Asked Questions (FAQ)

Q: Can IR2109SPBF be used as a direct replacement for IR2109S?

A: Yes. The IR2109SPBF is electrically and mechanically identical to the IR2109S. All electrical parameters, including supply voltage, output current, switching times, and bootstrap voltage, are equivalent. The 8-SOIC package dimensions are identical, enabling direct PCB substitution without layout modifications.

Q: What are the key differences between IR2109SPBF and FAN7080MX-GF085?

A: Both devices maintain identical half-bridge, synchronous, dual-channel configuration with non-inverting inputs and 8-SOIC packaging. The FAN7080MX-GF085 provides enhanced performance: lower minimum supply voltage (5.5V vs. 10V), higher peak output current (300mA/600mA vs. 200mA/350mA), and faster switching times (40ns/25ns vs. 150ns/50ns). Additionally, the FAN7080MX-GF085 carries ROHS3 compliance and AEC-Q100 qualification.

Q: Is the FAN7080MX-GF085 suitable for existing IR2109S designs?

A: Yes. The FAN7080MX-GF085 maintains all mandatory electrical and mechanical compatibility parameters. The enhanced current delivery and faster switching characteristics are backward-compatible with IR2109S applications. However, designs operating at supply voltages below 10V will require the FAN7080MX-GF085 due to its lower minimum supply voltage specification.

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

A: No. All three parts (IR2109S, IR2109SPBF, FAN7080MX-GF085) use the 8-SOIC package with identical 0.154" (3.90mm) width. Pin assignments and footprint dimensions are compatible, allowing direct PCB substitution without layout changes.

Q: What compliance considerations apply to these substitutes?

A: The IR2109S is RoHS non-compliant. The IR2109SPBF compliance status is not specified in available documentation. The FAN7080MX-GF085 is ROHS3 compliant and carries AEC-Q100 automotive qualification. For applications requiring regulatory compliance, the FAN7080MX-GF085 is the appropriate selection.

Q: Can these gate drivers be used interchangeably in half-bridge IGBT and MOSFET applications?

A: Yes. All three parts are specified for half-bridge gate driving of both IGBT and N-Channel MOSFET devices. The non-inverting input logic, synchronous channel configuration, and 600V bootstrap voltage rating support standard half-bridge topologies without modification.