AO4772 Equivalent & Substitute Parts

Part Overview

The AO4772 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 30V drain-to-source voltage with 6A continuous drain current at 25°C. This device features a Schottky diode and is housed in an 8-SOIC surface mount package. The AO4772 is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while accommodating modern active product availability.

Substiute Parts

AO4772

Alpha & Omega Semiconductor Inc.In Stock: 6836AO4772 Datasheet

Current PartRFQ

DMN3024LSS-13

Diodes IncorporatedIn Stock: 3187DMN3024LSS-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AO4772 is determined by strict electrical and mechanical compatibility across the following parameters:

Voltage Rating Compatibility: The substitute part must maintain a Drain to Source Voltage (Vdss) rating of 30V or greater to ensure safe operation in the original circuit topology.

Current Handling: The substitute part must support continuous drain current (Id) at 25°C equal to or exceeding 6A to meet or exceed the original device performance envelope.

On-Resistance (Rds On): The substitute part must maintain Rds On specifications at rated current and gate voltage that do not exceed the original specification, ensuring thermal performance and power dissipation remain within acceptable limits.

Gate Threshold Voltage (Vgs(th)): The substitute part must operate within compatible gate threshold voltage ranges to ensure proper switching behavior with existing gate drive circuits.

Gate Charge (Qg): The substitute part's gate charge must be compatible with the gate drive circuit design; higher gate charge values may require circuit verification.

Input Capacitance (Ciss): The substitute part's input capacitance must be compatible with gate drive timing and switching frequency requirements.

Package Compatibility: The substitute part must be housed in an 8-SOIC or equivalent surface mount package to ensure PCB layout compatibility.

Operating Temperature Range: The substitute part must support the full operating temperature range of -55°C to 150°C (TJ).

The DMN3024LSS-13 from Diodes Incorporated meets all substitution criteria and is classified as an active product, providing long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The DMN3024LSS-13 is the manufacturer-recommended substitute for the obsolete AO4772. This substitution is supported by the following engineering criteria:

Electrical Compatibility: The DMN3024LSS-13 meets or exceeds all critical electrical parameters. The 30V Vdss rating matches the original specification. The 6.4A continuous drain current exceeds the 6A requirement, providing additional design margin. The on-resistance of 24 mOhm at 7A, 10V is superior to the original 30 mOhm specification, resulting in lower power dissipation and improved thermal performance.

Product Status and Availability: The DMN3024LSS-13 is classified as an active product with 3139 units in stock, ensuring long-term procurement availability and supply chain stability. The AO4772 is obsolete, making this substitution necessary for new designs and ongoing production support.

Compliance and Certifications: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.29.0095). The DMN3024LSS-13 carries RoHS3 compliance certification, meeting modern regulatory requirements. Both devices maintain Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions.

Thermal Performance: The DMN3024LSS-13 exhibits lower maximum power dissipation (1.6W vs. 2W), combined with superior on-resistance characteristics, resulting in reduced thermal load and improved reliability in thermal-constrained applications.

Package Compatibility: Both devices are housed in 8-SOIC packages with identical physical dimensions (0.154", 3.90mm Width), ensuring direct PCB layout compatibility without redesign.

Gate Drive Considerations: The DMN3024LSS-13 exhibits higher gate charge (12.9 nC vs. 6.3 nC) and input capacitance (608 pF vs. 310 pF). Gate drive circuits must be verified to confirm adequate drive capability at the intended switching frequency. Higher gate charge may increase switching losses in high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can the DMN3024LSS-13 be used as a direct replacement for the AO4772 without circuit modifications?

A: The DMN3024LSS-13 is electrically and mechanically compatible with the AO4772 across all critical parameters. Direct PCB substitution is supported. However, gate drive circuits operating at high switching frequencies should be verified to confirm adequate drive capability, as the DMN3024LSS-13 exhibits higher gate charge (12.9 nC vs. 6.3 nC).

Q: What are the key differences between the AO4772 and DMN3024LSS-13?

A: The primary differences are: (1) Product Status—the DMN3024LSS-13 is active while the AO4772 is obsolete; (2) Gate Charge—the DMN3024LSS-13 has 12.9 nC compared to 6.3 nC, requiring gate drive verification at high frequencies; (3) Input Capacitance—the DMN3024LSS-13 has 608 pF compared to 310 pF; (4) On-Resistance—the DMN3024LSS-13 has superior on-resistance (24 mOhm vs. 30 mOhm), resulting in lower power dissipation; (5) Continuous Drain Current—the DMN3024LSS-13 supports 6.4A compared to 6A, providing additional design margin.

Q: Are there any package compatibility concerns?

A: No. Both the AO4772 and DMN3024LSS-13 are housed in 8-SOIC packages with identical physical dimensions (0.154", 3.90mm Width). Direct PCB layout compatibility is confirmed without redesign.

Q: What is the impact of higher gate charge on circuit performance?

A: The DMN3024LSS-13 exhibits gate charge of 12.9 nC compared to the AO4772's 6.3 nC. Higher gate charge increases the time required to charge the gate capacitance during switching transitions. In high-frequency switching applications, this may increase switching losses and require verification that the gate drive circuit provides sufficient current to maintain intended switching frequency and efficiency. Low-frequency applications are unaffected.

Q: Are regulatory and compliance certifications equivalent?

A: Yes. Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99). The DMN3024LSS-13 carries RoHS3 compliance certification, meeting modern regulatory requirements. Both devices maintain Moisture Sensitivity Level 1 (Unlimited).

Q: What is the thermal performance comparison?

A: The DMN3024LSS-13 exhibits lower maximum power dissipation (1.6W vs. 2W) and superior on-resistance (24 mOhm vs. 30 mOhm at rated current and gate voltage). This results in reduced thermal load and improved reliability in thermally constrained applications.

Q: Is the DMN3024LSS-13 available in the same packaging format?

A: The DMN3024LSS-13 is available in Tape & Reel (TR) packaging, while the AO4772 packaging format is not specified in the provided data. Both devices use the 8-SOIC package format, ensuring mechanical compatibility. Verify tape and reel specifications with your supplier if specific packaging format requirements exist.