IR2181PBF Equivalent & Substitute Parts

Part Overview

The IR2181PBF 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 provides independent dual-channel gate driving capability with peak output currents of 1.9A (source) and 2.3A (sink).

The IR2181PBF is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and production continuity. The primary substitute maintains identical electrical performance while offering improved availability and active product status.

Substiute Parts

IR2181PBF

Infineon TechnologiesIn Stock: 1183IR2181PBF Datasheet

Current PartRFQ

IR2181STRPBF

Infineon TechnologiesIn Stock: 10464IR2181STRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR2181PBF is determined by strict equivalence across the following electrical and mechanical parameters:

• Driven configuration (half-bridge topology)
• Number of independent driver channels (2)
• Compatible gate types (IGBT, N-Channel MOSFET)
• Supply voltage range (10V ~ 20V)
• Logic input voltage thresholds (VIL 0.8V, VIH 2.7V)
• Peak output current specifications (1.9A source, 2.3A sink)
• Bootstrap voltage rating (600V maximum)
• Switching characteristics (rise/fall times 40ns/20ns)
• Operating temperature range (-40°C ~ 150°C)
• Regulatory compliance (ROHS3, REACH Unaffected)

The IR2181STRPBF qualifies as a direct substitute based on identical electrical performance across all specified parameters. The substitution involves a packaging change from through-hole (8-DIP) to surface-mount (8-SOIC) format, which is a mechanical consideration only and does not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The IR2181STRPBF is the direct functional equivalent of the IR2181PBF and is recommended for new designs and production transitions. Selection between these parts is determined by application requirements:

IR2181PBF (Through-Hole 8-DIP): Suitable for legacy designs, prototyping, and applications where through-hole mounting is specified. Product status is obsolete; inventory availability is limited to existing stock.

IR2181STRPBF (Surface-Mount 8-SOIC): Recommended for new production designs and applications utilizing surface-mount assembly processes. This part maintains active product status with significantly higher inventory availability. Both parts maintain identical ROHS3 compliance and REACH unaffected status.

The moisture sensitivity level difference (MSL 1 versus MSL 2) reflects standard packaging variations and does not affect functional performance in typical operating environments.

Frequently Asked Questions (FAQ)

Q: Are IR2181PBF and IR2181STRPBF electrically identical?

A: Yes. Both devices share identical electrical specifications including supply voltage range (10V ~ 20V), output current ratings (1.9A source, 2.3A sink), bootstrap voltage (600V), and switching characteristics (40ns rise, 20ns fall time). The difference is packaging format only.

Q: What is the primary difference between these parts?

A: The IR2181PBF uses through-hole mounting (8-DIP package), while the IR2181STRPBF uses surface-mount technology (8-SOIC package). This is a mechanical consideration that does not affect electrical function or performance.

Q: Can I use IR2181STRPBF as a direct replacement for IR2181PBF in existing designs?

A: Electrical substitution is direct. PCB layout modification is required due to the different package footprints (8-DIP versus 8-SOIC). Pin-to-pin functionality is equivalent.

Q: Why is IR2181PBF classified as obsolete?

A: The IR2181PBF is an older through-hole package variant. Infineon Technologies continues to support the IR2181 family through the active surface-mount IR2181STRPBF variant, which aligns with current manufacturing standards.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The moisture sensitivity level differs (MSL 1 for IR2181PBF, MSL 2 for IR2181STRPBF) due to packaging differences, but this does not affect performance in standard operating conditions.

Q: What inventory status should I expect?

A: IR2181PBF inventory is limited to existing stock (1131 pcs reported). IR2181STRPBF is actively manufactured with significantly higher availability (10400 pcs reported).