AON7932 Equivalent & Substitute Parts

Part Overview

The AON7932 is a dual N-channel MOSFET array manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with continuous drain current capabilities of 6.6A and 8.1A. The device features logic level gate operation and is packaged in a surface mount 8-DFN-EP (3x3) configuration with exposed pad for enhanced thermal management.

The AON7932 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

AON7932

Alpha & Omega Semiconductor Inc.In Stock: 4923AON7932 Datasheet

Current PartRFQ

AON7934

Alpha & Omega Semiconductor Inc.In Stock: 50469AON7934 Datasheet

MFR RecommendedRFQ

FDMS7620S

onsemiIn Stock: 9154FDMS7620S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AON7932 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain to Source Voltage (Vdss): Must equal or exceed 30V
• Configuration: Must maintain 2 N-Channel (Dual) topology
• FET Feature: Must support Logic Level Gate operation
• Operating Temperature Range: Must encompass -55°C to 150°C (TJ)
• Technology: Must be MOSFET (Metal Oxide) based

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package Configuration: 8-pin WDFN with Exposed Pad
• Pin count and footprint: 8-DFN-EP (3x3) or equivalent

Performance Parameters:

• Continuous drain current capability
• On-resistance (Rds On)
• Gate charge and input capacitance
• Maximum power dissipation

The substitute parts AON7934 and FDMS7620S satisfy the core electrical and mechanical requirements. Both devices maintain the 30V Vdss rating, dual N-channel configuration, logic level gate feature, and surface mount 8-pin WDFN package format. Both operate across the full -55°C to 150°C temperature range.

Parameter Comparison

Engineering Selection Recommendations

AON7934 Substitution:

The AON7934 is an active product from Alpha & Omega Semiconductor Inc. and represents the direct manufacturer upgrade path from the obsolete AON7932. Both devices share identical voltage ratings (30V Vdss), configuration (dual N-channel), gate feature (logic level), and package format (8-DFN-EP 3x3). The AON7934 delivers higher continuous drain current (13A, 15A versus 6.6A, 8.1A) and improved on-resistance characteristics (10.2mOhm versus 20mOhm), resulting in enhanced thermal performance (2.5W versus 1.4W maximum power). The AON7934 is ROHS3 compliant and maintains unlimited moisture sensitivity rating. This substitution is suitable for applications where the increased current capacity and reduced on-resistance provide design margin or performance improvement.

FDMS7620S Substitution:

The FDMS7620S is an active product from onsemi, manufactured under the PowerTrench® series. It maintains the 30V Vdss rating, dual N-channel configuration, logic level gate feature, and full operating temperature range. The FDMS7620S provides continuous drain current of 10.1A and 12.4A with on-resistance of 20mOhm, matching the AON7932 on-resistance specification. The device is packaged in an 8-PowerWDFN (Power56) configuration, which differs mechanically from the 8-DFN-EP (3x3) package of the AON7932. The FDMS7620S is ROHS3 compliant and REACH unaffected. This substitution requires PCB layout modification due to package differences but offers an alternative supply source with active product status.

Both substitute parts satisfy regulatory compliance requirements (ROHS3, REACH unaffected, EAR99 ECCN classification) and maintain the MSL 1 (Unlimited) moisture sensitivity rating of the original device.

Frequently Asked Questions (FAQ)

Q: Can the AON7934 be used as a direct replacement for the AON7932 without PCB modification?

A: Yes. The AON7934 maintains identical package format (8-DFN-EP 3x3) and pin configuration as the AON7932. No PCB layout changes are required. The AON7934 is electrically compatible across all critical parameters: 30V Vdss, dual N-channel configuration, logic level gate operation, and -55°C to 150°C operating temperature range.

Q: What are the key differences between AON7934 and FDMS7620S substitutes?

A: The AON7934 and FDMS7620S differ in three primary aspects: (1) Manufacturer—AON7934 is from Alpha & Omega Semiconductor Inc., FDMS7620S is from onsemi; (2) Package format—AON7934 uses 8-DFN-EP (3x3), FDMS7620S uses 8-PowerWDFN (Power56), requiring PCB redesign; (3) Performance characteristics—AON7934 offers higher current capacity (13A, 15A) and lower on-resistance (10.2mOhm), while FDMS7620S provides intermediate current (10.1A, 12.4A) with on-resistance matching the original AON7932 (20mOhm).

Q: Is PCB modification required to use the FDMS7620S?

A: Yes. The FDMS7620S uses an 8-PowerWDFN (Power56) package, which differs mechanically from the AON7932's 8-DFN-EP (3x3) package. PCB footprint redesign is necessary. Consult the respective datasheets for detailed package dimensions and pin assignments before layout modification.

Q: Are both substitute parts compliant with current regulatory standards?

A: Yes. Both AON7934 and FDMS7620S are ROHS3 compliant and REACH unaffected. Both maintain MSL 1 (Unlimited) moisture sensitivity rating and EAR99 ECCN classification, matching the regulatory profile of the original AON7932.

Q: What is the continuous drain current difference between the AON7932 and its substitutes?

A: The AON7932 is rated for 6.6A and 8.1A continuous drain current. The AON7934 provides 13A and 15A, representing a 97% to 85% increase. The FDMS7620S provides 10.1A and 12.4A, representing a 53% to 53% increase. Selection depends on application current requirements and thermal design constraints.

Q: Can the AON7932 be used interchangeably with AON7934 in existing designs?

A: The AON7934 is a higher-performance variant suitable for direct substitution in designs originally specified for the AON7932. The identical package and pin configuration ensure mechanical compatibility. The increased current capacity and improved on-resistance of the AON7934 provide design margin. No circuit modifications are required.

Q: What thermal performance differences exist between the substitutes?

A: The AON7932 is rated for 1.4W maximum power dissipation. The AON7934 supports 2.5W, providing 79% higher thermal capacity. The FDMS7620S is rated for 1W, providing 29% lower thermal capacity than the original. Thermal performance selection depends on application power dissipation requirements and PCB thermal design.