IR21844PBF Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR21844PBF 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 synchronized dual-channel gate driving with a maximum bootstrap voltage of 600V.

The IR21844PBF is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this gate driver topology.

Substiute Parts

IR21844PBF

Infineon TechnologiesIn Stock: 1035IR21844PBF Datasheet

Current PartRFQ

IR21844STRPBF

Infineon TechnologiesIn Stock: 16027IR21844STRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR21844PBF is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Driven configuration must be half-bridge with synchronous dual-channel operation
• Gate type compatibility with IGBT and N-Channel MOSFET devices
• Supply voltage range of 10V ~ 20V
• Logic voltage thresholds: VIL 0.8V, VIH 2.7V
• Peak output current specifications: 1.9A source, 2.3A sink
• Non-inverting input type
• Bootstrap voltage rating of 600V maximum
• Rise and fall time characteristics: 40ns rise, 20ns fall (typical)
• Operating temperature range: -40°C ~ 150°C

Mechanical Compatibility:

• Package type and pin configuration must support the application's mounting requirements
• Base product number IR21844 indicates functional equivalence within the Infineon product family

The IR21844STRPBF qualifies as a direct substitute based on identical electrical specifications and functional parameters, with the primary difference being packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The IR21844STRPBF is the manufacturer-recommended substitute for the obsolete IR21844PBF. Both devices share identical electrical specifications and functional parameters, ensuring direct functional compatibility in half-bridge gate driver applications.

Product Status Consideration: The IR21844PBF is classified as obsolete, while the IR21844STRPBF maintains active product status with higher inventory availability. Selection of the active substitute ensures long-term supply chain continuity and access to current manufacturing batches.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component selection.

Packaging Transition: The primary distinction between these parts is packaging format. The IR21844PBF uses through-hole 14-DIP mounting, while the IR21844STRPBF employs surface-mount 14-SOIC packaging. PCB layout and assembly process modifications are required to accommodate this packaging change.

Moisture Sensitivity: The IR21844STRPBF carries MSL 3 (168 hours) compared to the IR21844PBF's MSL 1 (unlimited). Storage and handling procedures must align with the higher moisture sensitivity classification of the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the IR21844STRPBF directly replace the IR21844PBF in existing designs?

A: Electrical and functional compatibility is complete. PCB redesign is required due to packaging differences: the IR21844PBF uses through-hole 14-DIP mounting while the IR21844STRPBF uses surface-mount 14-SOIC. Pin-to-pin electrical functionality remains identical.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by half-bridge configuration, synchronous dual-channel operation, 10V-20V supply voltage, 1.9A/2.3A peak output current, 600V bootstrap voltage rating, and -40°C to 150°C operating temperature range. Both parts meet these specifications identically.

Q: Are there compliance differences between the two parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. The primary compliance difference is moisture sensitivity level: IR21844PBF is MSL 1 (unlimited storage), while IR21844STRPBF is MSL 3 (168-hour storage limit). Handling and storage procedures must reflect this distinction.

Q: Why is the IR21844PBF classified as obsolete?

A: The IR21844PBF is obsolete due to packaging format discontinuation. The IR21844STRPBF represents the active product continuation with identical electrical specifications and surface-mount packaging aligned with current manufacturing standards.

Q: What inventory considerations apply to these parts?

A: The IR21844PBF shows 1012 pieces in stock as new original inventory. The IR21844STRPBF shows significantly higher availability at 15933 pieces. For new designs or production continuity, the IR21844STRPBF is the recommended selection due to active status and superior supply availability.