IR21084SPBF Equivalent & Substitute Parts

Part Overview

The IR21084SPBF is a half-bridge gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET devices in power management applications. This device operates with a supply voltage range of 10V to 20V and features independent channel configuration with non-inverting input logic. The IR21084SPBF is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

IR21084SPBF

Infineon TechnologiesIn Stock: 4340IR21084SPBF Datasheet

Current PartRFQ

IR21064STRPBF

Infineon TechnologiesIn Stock: 5340IR21064STRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR21084SPBF is determined by strict alignment of the following critical parameters:

• Package / Case: Both parts must use 14-SOIC (0.154", 3.90mm Width) surface mount packaging for mechanical and electrical compatibility
• Supply Voltage Range: 10V ~ 20V compatibility ensures proper operation in existing power supply designs
• Logic Voltage Levels: VIL and VIH specifications (0.8V, 2.9V) must match for signal integrity with existing control circuitry
• Peak Output Current: Source and sink current ratings (200mA, 350mA) must be equivalent to support gate drive requirements
• Input Logic Type: Non-inverting configuration must be maintained for control signal compatibility
• Bootstrap Voltage Rating: 600V maximum rating ensures high-side driver functionality in half-bridge and high-side topologies
• Rise / Fall Time: 150ns rise and 50ns fall time specifications must be preserved for switching performance
• Operating Temperature Range: -40°C ~ 150°C (TJ) compatibility for thermal environment matching
• Gate Type Support: IGBT and N-Channel MOSFET compatibility must be maintained
• Compliance Standards: RoHS3 compliance and REACH unaffected status required for regulatory alignment

The IR21064STRPBF qualifies as a substitute based on matching all critical electrical and mechanical parameters, with the distinction that it supports both high-side or low-side driven configuration compared to the half-bridge configuration of the IR21084SPBF.

Parameter Comparison

Engineering Selection Recommendations

The IR21064STRPBF is the qualified substitute for the obsolete IR21084SPBF based on the following engineering criteria:

Product Status Alignment: The IR21064STRPBF maintains active product status with Infineon Technologies, ensuring ongoing availability, technical support, and manufacturing continuity. This addresses the obsolescence of the IR21084SPBF.

Electrical Parameter Equivalence: All critical electrical specifications match exactly, including supply voltage range (10V ~ 20V), logic voltage thresholds (0.8V, 2.9V), peak output current ratings (200mA source, 350mA sink), bootstrap voltage rating (600V), and switching characteristics (150ns rise, 50ns fall time).

Mechanical Compatibility: Both devices use identical 14-SOIC surface mount packaging with 0.154" (3.90mm) width, ensuring direct PCB layout compatibility without redesign.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

Functional Capability: While the IR21064STRPBF supports high-side or low-side driven configuration compared to the half-bridge configuration of the IR21084SPBF, the electrical parameters and gate drive characteristics remain equivalent for applications requiring half-bridge operation.

Frequently Asked Questions (FAQ)

Q: Can the IR21064STRPBF directly replace the IR21084SPBF in existing designs?

A: Yes. The IR21064STRPBF matches all critical electrical parameters (supply voltage, logic levels, output current, bootstrap voltage, and switching times) and uses identical 14-SOIC packaging. No PCB modifications are required for mechanical compatibility.

Q: What is the difference between half-bridge and high-side or low-side driven configuration?

A: The IR21084SPBF is optimized for half-bridge topologies where both high-side and low-side drivers operate in a complementary pair. The IR21064STRPBF supports independent high-side or low-side operation, providing greater flexibility in topology selection. Both devices can function in half-bridge applications.

Q: Are the logic voltage thresholds identical between these parts?

A: Yes. Both the IR21084SPBF and IR21064STRPBF specify VIL of 0.8V and VIH of 2.9V, ensuring compatible signal interpretation from control circuitry.

Q: Do both parts support the same gate types?

A: Yes. Both devices support IGBT and N-Channel MOSFET gate driving with identical peak output current ratings (200mA source, 350mA sink).

Q: What is the significance of the 600V bootstrap voltage rating?

A: The 600V maximum bootstrap voltage rating defines the maximum voltage differential that the high-side driver can withstand. Both parts maintain this specification, ensuring compatibility in high-voltage switching applications.

Q: Are there any thermal or environmental differences between these parts?

A: No. Both parts operate across the identical temperature range of -40°C to 150°C (junction temperature) and maintain the same Moisture Sensitivity Level (MSL 3, 168 hours).

Q: Why is the IR21084SPBF obsolete while the IR21064STRPBF remains active?

A: Product lifecycle decisions are determined by manufacturer production planning. The IR21064STRPBF's broader configuration flexibility (high-side or low-side) likely supports a wider range of applications, justifying continued production.

Q: Is the packaging designation "Tape & Reel (TR)" for the IR21064STRPBF compatible with existing assembly processes?

A: Yes. Tape & Reel packaging is standard for surface mount assembly and is compatible with automated pick-and-place equipment. The 14-SOIC package dimensions remain identical to the IR21084SPBF.