IR21084STR Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR21084STR 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 with peak output currents of 200mA (source) and 350mA (sink).

The IR21084STR is classified as obsolete. Identifying suitable substitute parts is essential for design continuity, procurement flexibility, and ensuring long-term product availability in applications where this gate driver is specified.

Substiute Parts

IR21084STR

Infineon TechnologiesIn Stock: 7982IR21084STR Datasheet

Current PartRFQ

IR21084STRPBF

Infineon TechnologiesIn Stock: 20967IR21084STRPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR21084STR is determined by strict equivalence across the following critical parameters:

• Driven configuration (half-bridge topology)
• Number of independent driver channels (2)
• Gate type compatibility (IGBT and N-Channel MOSFET support)
• Supply voltage range (10V ~ 20V)
• Logic input voltage thresholds (VIL 0.8V, VIH 2.9V)
• Peak output current specifications (200mA source, 350mA sink)
• Input signal polarity (non-inverting)
• Bootstrap voltage rating (600V maximum)
• Timing characteristics (rise/fall times)
• Operating temperature range (-40°C ~ 150°C)
• Physical package form factor (14-SOIC)
• Surface mount compatibility

The IR21084STRPBF meets all these criteria and qualifies as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The IR21084STRPBF is the direct substitute for the IR21084STR. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The IR21084STR is obsolete, while the IR21084STRPBF maintains active production status. The IR21084STRPBF carries ROHS3 compliance certification, meeting current environmental and regulatory requirements. The IR21084STR does not carry RoHS compliance.

For new designs or ongoing production requiring this gate driver topology, the IR21084STRPBF is the appropriate selection. The packaging difference (bulk versus tape & reel) reflects standard distribution formats and does not affect electrical performance or board-level integration.

Frequently Asked Questions (FAQ)

Q: Can IR21084STRPBF directly replace IR21084STR in existing designs?

A: Yes. Both parts are electrically and mechanically identical. Pin configuration, electrical ratings, timing characteristics, and operating parameters are equivalent. Direct substitution on PCBs designed for IR21084STR is supported.

Q: What is the significance of the "STRPBF" suffix in IR21084STRPBF?

A: The STRPBF designation indicates the part is supplied in tape & reel packaging format with lead-free (PbF) termination, meeting RoHS3 compliance requirements. The IR21084STR uses bulk packaging without RoHS certification.

Q: Are there differences in moisture sensitivity between these parts?

A: Yes. The IR21084STR has MSL 1 (unlimited moisture exposure tolerance), while IR21084STRPBF has MSL 3 (168-hour moisture exposure limit). MSL 3 requires standard moisture control during storage and handling per IPC standards. This does not affect electrical performance or long-term reliability when proper storage conditions are maintained.

Q: Is the 14-SOIC package identical for both parts?

A: Yes. Both parts use the 14-SOIC package with 0.154-inch (3.90mm) width. PCB footprints, land patterns, and assembly processes are identical.

Q: Why is IR21084STR classified as obsolete?

A: The IR21084STR has reached end-of-life status in Infineon's product portfolio. The IR21084STRPBF represents the current production equivalent with updated compliance certifications.