AON6924 MOSFET Equivalent & Substitute Parts

Part Overview

The AON6924 is a dual N-channel MOSFET array designed for surface mount applications, featuring a 30V drain-to-source voltage rating and asymmetrical current specifications of 15A and 28A per channel. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part is housed in an 8-DFN-EP (5x6) package with exposed pad configuration and operates across an industrial temperature range of -55°C to 150°C.

Substiute Parts

AON6924

Alpha & Omega Semiconductor Inc.In Stock: 3987AON6924 Datasheet

Current PartRFQ

AON6992

Alpha & Omega Semiconductor Inc.In Stock: 15658AON6992 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AON6924 is determined by electrical and mechanical compatibility across the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain the 30V Vdss specification to ensure safe operation within the same circuit voltage envelope.

Current Handling Capability: The substitute must support continuous drain current specifications equal to or exceeding the AON6924's 15A and 28A asymmetrical ratings. The AON6992 provides enhanced current ratings of 19A and 31A, representing an improvement in current capacity.

On-Resistance Characteristics: The Rds On value of 5.2 mOhm at 20A, 10V establishes the switching loss profile. The AON6992 maintains this specification, ensuring equivalent thermal performance and power dissipation behavior.

Gate Drive Requirements: Logic level gate operation is maintained across both parts, confirming compatibility with existing gate drive circuitry.

Package and Thermal Interface: Both parts utilize 8-DFN surface mount packages with exposed pad configurations, supporting identical PCB layout and thermal management approaches.

Temperature Operating Range: The -55°C to 150°C junction temperature range is preserved, maintaining environmental suitability.

Regulatory Compliance: Both parts carry ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification.

Parameter Comparison

Engineering Selection Recommendations

The AON6992 serves as the primary substitute for the obsolete AON6924 based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical voltage ratings (30V Vdss) and on-resistance specifications (5.2 mOhm @ 20A, 10V), ensuring direct functional equivalence in switching applications. The AON6992 provides superior current handling with 19A and 31A ratings compared to the AON6924's 15A and 28A, offering design margin without circuit modification.

Thermal Performance Enhancement: The AON6992 supports increased maximum power dissipation (3.1W versus 2W/2.2W), enabling operation at higher power levels or improved thermal headroom in existing designs.

Gate Drive Optimization: The AON6992 exhibits reduced gate charge (13nC versus 21nC) and input capacitance (820pF versus 1560pF), resulting in faster switching transitions and lower gate drive power requirements.

Regulatory and Compliance Alignment: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels (MSL 1), ensuring no additional supply chain or environmental qualification requirements.

Package Compatibility: Both parts utilize 8-DFN surface mount packages with exposed pad thermal interfaces, supporting identical PCB layout and assembly processes. The AON6992 package designation (8-PowerWDFN) indicates enhanced thermal performance characteristics within the same physical footprint.

Product Status Consideration: While both parts carry obsolete status, the AON6992 maintains significantly higher inventory availability (15,605 pieces versus 3,951 pieces), supporting procurement continuity and long-term supply security.

Frequently Asked Questions (FAQ)

Q: Can the AON6992 directly replace the AON6924 without circuit modifications?

A: Yes. The AON6992 maintains identical voltage ratings, on-resistance, and gate drive characteristics. The enhanced current ratings and reduced gate charge represent performance improvements that do not require circuit redesign. PCB layout remains compatible due to identical 8-DFN package footprints.

Q: What are the key differences between the AON6924 and AON6992?

A: The primary differences are continuous drain current specifications (AON6992: 19A/31A versus AON6924: 15A/28A), maximum power dissipation (AON6992: 3.1W versus AON6924: 2W/2.2W), gate charge (AON6992: 13nC versus AON6924: 21nC), and input capacitance (AON6992: 820pF versus AON6924: 1560pF). On-resistance and voltage ratings remain identical.

Q: Are there thermal management differences between these parts?

A: The AON6992 provides enhanced thermal performance through higher power dissipation capability (3.1W) and reduced input capacitance, which decreases switching losses. Both parts utilize exposed pad packages for thermal coupling to PCB ground planes. The AON6992 designation as 8-PowerWDFN indicates optimized thermal characteristics within the same physical package.

Q: What is the impact of reduced gate charge on circuit operation?

A: Reduced gate charge (13nC in AON6992 versus 21nC in AON6924) results in faster switching transitions and lower gate drive power consumption. This improvement is transparent to the circuit and requires no modifications to gate drive circuitry.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the AON6924 and AON6992 operate across -55°C to 150°C junction temperature range, maintaining identical environmental suitability for industrial applications.

Q: What is the significance of the package designation change from 8-WDFN to 8-PowerWDFN?

A: The 8-PowerWDFN designation indicates enhanced thermal performance optimization within the same 5x6mm physical footprint. Both packages are mechanically and electrically compatible for PCB assembly and layout purposes.

Q: Do both parts require identical moisture handling procedures?

A: Yes. Both parts carry MSL 1 (Unlimited) moisture sensitivity level, indicating no moisture sensitivity restrictions and identical handling requirements throughout the supply chain and assembly process.

Q: Are there supply chain advantages to selecting the AON6992?

A: The AON6992 maintains significantly higher inventory availability (15,605 pieces versus 3,951 pieces), supporting improved procurement lead times and long-term supply security despite both parts carrying obsolete status.