IR21834STR Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR21834STR 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 features independent dual-channel architecture with inverting and non-inverting input types, supporting bootstrap voltages up to 600V.

The IR21834STR carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this gate driver topology.

Substiute Parts

IR21834STR

Infineon TechnologiesIn Stock: 2484IR21834STR Datasheet

Current PartRFQ

IR21834STRPBF

Infineon TechnologiesIn Stock: 2755IR21834STRPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the IR21834STR is determined by strict equivalence across electrical and mechanical parameters. The primary substitute identified is the IR21834STRPBF, which maintains identical functional specifications including half-bridge configuration, dual independent channels, gate type compatibility, supply voltage range, output current ratings, bootstrap voltage capability, and timing characteristics.

The substitution is valid based on the following critical parameters:

• Driven Configuration: Half-Bridge (identical)
• Number of Drivers: 2 (identical)
• Gate Type: IGBT, N-Channel MOSFET (identical)
• Voltage - Supply: 10V ~ 20V (identical)
• Current - Peak Output: 1.9A source, 2.3A sink (identical)
• High Side Voltage - Max: 600V (identical)
• Rise / Fall Time: 40ns, 20ns (identical)
• Operating Temperature Range: -40°C ~ 150°C (identical)
• Package / Case: 14-SOIC (identical)

Parameter Comparison

Engineering Selection Recommendations

The IR21834STRPBF is the direct equivalent substitute for the IR21834STR. Both parts are manufactured by Infineon Technologies and maintain identical electrical and mechanical specifications across all functional parameters.

The IR21834STRPBF offers the following advantages for new designs and production continuity:

• Active product status ensures ongoing manufacturer support and availability
• ROHS3 compliance satisfies modern regulatory requirements
• Expanded packaging options (Cut Tape and Digi-Reel) provide supply chain flexibility
• Identical electrical performance eliminates design modification requirements

The IR21834STR's obsolete status and RoHS non-compliance make the IR21834STRPBF the preferred selection for applications requiring regulatory compliance and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can IR21834STRPBF be used as a direct replacement for IR21834STR in existing designs?

A: Yes. The IR21834STRPBF is electrically and mechanically identical to the IR21834STR. All functional parameters, including gate driver configuration, output current ratings, voltage specifications, timing characteristics, and package dimensions are equivalent. No circuit modifications are required.

Q: What is the difference between the two part numbers?

A: The primary differences are product status and compliance certifications. The IR21834STR is obsolete and RoHS non-compliant, while the IR21834STRPBF is active and ROHS3 compliant. The "PBF" suffix indicates lead-free plating and RoHS compliance. Electrical performance is identical.

Q: Are there packaging differences between IR21834STR and IR21834STRPBF?

A: The IR21834STR is supplied in Cut Tape (CT) packaging. The IR21834STRPBF is available in both Cut Tape (CT) and Digi-Reel® packaging options, providing greater supply chain flexibility.

Q: What is the Moisture Sensitivity Level difference, and does it affect compatibility?

A: The IR21834STR has MSL 1 (unlimited moisture exposure tolerance), while IR21834STRPBF has MSL 3 (168-hour moisture exposure limit). This affects storage and handling procedures but does not impact electrical performance or circuit compatibility. Standard moisture control practices during assembly are required for the IR21834STRPBF.

Q: Is the IR21834STRPBF suitable for applications requiring RoHS compliance?

A: Yes. The IR21834STRPBF is ROHS3 compliant and meets modern regulatory requirements for lead-free and restricted substance compliance. The IR21834STR is not RoHS compliant and should not be used in applications with RoHS requirements.

Q: Can both parts be used interchangeably in production?

A: Yes, from an electrical and mechanical standpoint. However, the IR21834STRPBF is recommended for all new production due to its active status, RoHS compliance, and superior supply chain availability. The IR21834STR should be reserved for legacy system maintenance only.