IR2181 Half-Bridge Gate Driver IC - Equivalent & Substitute Parts

Part Overview

The IR2181 is a half-bridge gate driver IC designed for driving IGBT and N-Channel MOSFET configurations in power management applications. This non-inverting driver operates with independent channels and provides peak output currents suitable for high-frequency switching applications. The main part number IR2181 is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance requirements. The IR2181PBF represents the active equivalent with identical electrical and mechanical specifications.

Substiute Parts

IR2181

Infineon TechnologiesIn Stock: 861IR2181 Datasheet

Current PartRFQ

IR2181PBF

International RectifierIn Stock: 1177IR2181PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR2181 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part IR2181PBF maintains identical specifications in the following key areas:

• Driven configuration (half-bridge topology)
• Number of independent driver channels (2)
• Gate type compatibility (IGBT and N-Channel MOSFET)
• Input signal polarity (non-inverting)
• Supply voltage range (10V ~ 20V)
• Logic threshold levels (VIL 0.8V, VIH 2.7V)
• Peak output current ratings (source 1.9A, sink 2.3A)
• Bootstrap voltage capability (600V maximum)
• Switching speed characteristics (rise/fall times)
• Operating temperature range (-40°C ~ 150°C)
• Physical package format (8-DIP through-hole)

The IR2181PBF is classified as an active product, whereas the original IR2181 is obsolete, making it the direct functional replacement for new designs and production continuity.

Parameter Comparison

Engineering Selection Recommendations

The IR2181PBF is the direct equivalent for the obsolete IR2181. Selection of IR2181PBF is based on:

• Active product status ensuring ongoing availability and supply chain continuity
• Identical electrical specifications across all critical parameters
• Identical physical package and mounting configuration
• Equivalent export classification (EAR99) and tariff codes
• Full compatibility with existing PCB layouts and circuit designs

No design modifications are required when transitioning from IR2181 to IR2181PBF. The substitute part provides direct pin-for-pin and functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can IR2181PBF be used as a direct replacement for IR2181?

A: Yes. IR2181PBF is electrically and mechanically identical to IR2181 across all specified parameters. No circuit modifications are required.

Q: Why is the IR2181 listed as obsolete?

A: The IR2181 has been discontinued by the manufacturer. IR2181PBF represents the active equivalent product line.

Q: Are there any differences in package dimensions between IR2181 and IR2181PBF?

A: No. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package format with identical pin configurations.

Q: What are the critical parameters for half-bridge gate driver substitution?

A: Supply voltage range, peak output current ratings, logic threshold levels, bootstrap voltage capability, switching speed characteristics, and operating temperature range must match exactly. Both IR2181 and IR2181PBF meet these criteria.

Q: Is IR2181PBF RoHS compliant?

A: Compliance information for IR2181PBF is not provided in the available specifications. Refer to the manufacturer's current datasheet for RoHS status.

Q: Can these parts be used in new designs?

A: IR2181PBF is classified as active and is suitable for new designs. The original IR2181 is obsolete and should not be specified for new applications.