IR21844S Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR21844S 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 IR21844S carries an Obsolete product status, making it necessary to identify functionally equivalent alternatives for new designs and ongoing production requirements. The part is non-compliant with RoHS standards, which may present sourcing and regulatory constraints for certain applications.

Substiute Parts

IR21844S

Infineon TechnologiesIn Stock: 1816IR21844S Datasheet

Current PartRFQ

IR21844SPBF

Infineon TechnologiesIn Stock: 93164IR21844SPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IR21844S is determined by strict equivalence across the following critical parameters:

• Driven Configuration: Half-Bridge topology
• Channel Type: Synchronous dual-channel operation
• Gate Type: IGBT and N-Channel MOSFET compatibility
• Voltage - Supply: 10V ~ 20V operating range
• Logic Voltage Levels: VIL 0.8V, VIH 2.7V
• Current - Peak Output: Source 1.9A, Sink 2.3A
• Input Type: Non-Inverting
• High Side Voltage - Max (Bootstrap): 600V
• Package / Case: 14-SOIC form factor
• Operating Temperature Range: -40°C ~ 150°C (TJ)

The IR21844SPBF qualifies as a direct substitute, maintaining identical electrical specifications and mechanical packaging while offering improved regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

The IR21844SPBF is the direct functional equivalent of the IR21844S for half-bridge gate driver applications. Both parts maintain identical electrical performance specifications and mechanical compatibility within the 14-SOIC package.

The IR21844SPBF offers superior compliance status, meeting ROHS3 requirements compared to the non-compliant IR21844S. This compliance advantage makes IR21844SPBF the preferred selection for applications subject to RoHS regulations or requiring long-term supply chain stability.

The IR21844S, designated as Obsolete, presents sourcing constraints for new production. The IR21844SPBF, classified as Not For New Designs, indicates limited manufacturer support for future development. Both statuses necessitate evaluation of long-term component availability and supply chain planning.

Moisture sensitivity differs between the two parts: IR21844S carries MSL 1 (Unlimited), while IR21844SPBF carries MSL 3 (168 Hours). This distinction affects storage, handling, and reflow processing requirements in manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can IR21844SPBF directly replace IR21844S in existing designs?

A: Yes. The IR21844SPBF maintains identical electrical specifications, logic voltage levels, output current ratings, and 14-SOIC packaging. Pin-for-pin compatibility is confirmed across all functional parameters.

Q: What is the significance of the product status difference between Obsolete and Not For New Designs?

A: Obsolete status indicates the IR21844S is no longer manufactured or supported. Not For New Designs status for IR21844SPBF indicates limited manufacturer commitment to future development. Both statuses require component availability verification with suppliers before committing to production volumes.

Q: How does the RoHS compliance difference affect substitution?

A: IR21844SPBF meets ROHS3 compliance, while IR21844S does not. For applications subject to RoHS regulations or customer requirements, IR21844SPBF is the compliant selection. For legacy systems without RoHS mandates, both parts are functionally equivalent.

Q: What are the implications of different Moisture Sensitivity Levels?

A: IR21844S (MSL 1) has unlimited shelf life under standard storage conditions. IR21844SPBF (MSL 3) requires controlled humidity storage and must be reflowed within 168 hours of package opening. Manufacturing processes must accommodate the stricter MSL 3 handling requirements for IR21844SPBF.

Q: Are there any differences in gate drive capability between these parts?

A: No. Both parts provide identical peak output current (1.9A source, 2.3A sink), rise/fall times (40ns, 20ns), and bootstrap voltage rating (600V). Gate drive performance is equivalent for IGBT and N-Channel MOSFET applications.

Q: What supply voltage range applies to both parts?

A: Both IR21844S and IR21844SPBF operate within the 10V to 20V supply voltage range with identical logic voltage thresholds (VIL 0.8V, VIH 2.7V).