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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Alpha & Omega Semiconductor Inc. AOD484

Name: AOD484
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD484
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD484

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AOD484.pdf

Description:: MOSFET N-CH 30V 25A TO252

Quantity:: RFQ Add To RFQ list

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Inventory:8,952

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Product details

Overview

AOD484 from Alpha & Omega Semiconductor is a 40 V, 75 A, 5.2 mΩ N-channel enhancement-mode MOSFET in TO-252 (DPAK) package, designed for high-efficiency DC-DC conversion and motor control switching in industrial power supplies and automotive body electronics.

For engineers reviewing the AOD484 datasheet, pinout, applications, or equivalent options, key selection criteria include R_DS(on) at 10 V gate drive, continuous drain current rating, thermal resistance (R_θJA), avalanche energy rating, and halogen-free compliance status.

Technical Context

The AOD484 uses trench-gate process technology to achieve low on-resistance and fast switching with minimal gate charge (Q_g = 52 nC). It supports logic-level gate drive (V_GS(th) = 2.0–3.5 V) and features 100% UIS-rated avalanche capability (E_AS = 190 mJ).

Thermal performance is optimized for surface-mount PCB layouts: R_θJA = 62°C/W (standard JEDEC 2s2p layout), and R_θJC = 1.2°C/W enables effective heatsinking through the exposed drain pad.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - maximum blocking voltage for 12 V/24 V system-level power switches
I_D (continuous)	75 A - supports high-current load switching without forced air cooling
R_DS(on) @ V_GS = 10 V	5.2 mΩ - enables <1 W conduction loss at 10 A, critical for thermal budget in compact designs
Q_g	52 nC - determines gate driver sizing and switching loss in PWM applications
E_AS	190 mJ - ensures robustness against inductive load turn-off transients without external snubbers
R_θJA	62°C/W - defines junction-to-ambient temperature rise under standard PCB layout conditions

Pinout & Package

TO-252 (DPAK) surface-mount package with exposed drain pad for thermal and electrical connection. Standard 3-pin configuration: Gate (G), Drain (D), Source (S).

Pin/Terminal	Circuit Role	Design Meaning
G	Gate terminal	Controls channel conduction; requires 2.0–3.5 V threshold and 10 V for full R_DS(on)
D	Drain terminal / Exposed pad	Primary high-side switching node; pad must be soldered to large copper area for thermal management
S	Source terminal	Reference node for gate drive; connects to power ground or low-side return path

Key Features

Feature	Design Value
Halogen-free construction	Complies with AOS Green Policy (Br/Cl <900 ppm each, total <1500 ppm); no "L" suffix required for AOD484
100% UIS-tested avalanche capability	Guarantees single-pulse ruggedness up to 190 mJ without derating or external protection
Low Q_g/Q_gd ratio	Reduces switching losses and improves EMI behavior in hard-switched SMPS topologies
Enhanced body diode dV/dt immunity	Prevents false turn-on during high-speed commutation in half-bridge configurations

Applications

Automotive Body Control Module	Industrial DC-DC Converter
Use Scenario: Driving solenoids, relays, and LED arrays in door modules and lighting systems. IC Role / Device Role / Timing Role: High-side load switch with integrated overcurrent and thermal protection. Use Value: Low R_DS(on) minimizes voltage drop across battery-fed loads, preserving headroom for 12 V nominal systems.	Use Scenario: Synchronous rectification in 48 V–12 V buck converters for factory automation controllers. IC Role / Device Role / Timing Role: Low-side synchronous FET in fixed-frequency PWM topology. Use Value: 5.2 mΩ R_DS(on) reduces conduction loss by >30% versus 8 mΩ alternatives at 20 A load current.
Motor Drive Half-Bridge	Server VRM High-Side Switch
Use Scenario: Low-side switch in 24 V brushed DC motor drivers for HVAC actuators. IC Role / Device Role / Timing Role: Fast-turning, avalanche-rugged switch handling inductive kickback during PWM commutation. Use Value: 190 mJ E_AS eliminates need for freewheeling diode snubbers in cost-sensitive designs.	Use Scenario: High-side switch in multiphase VRMs powering Xeon-class server CPUs. IC Role / Device Role / Timing Role: Logic-level driven power switch enabling direct microcontroller interface without level-shifting. Use Value: V_GS(th) range of 2.0–3.5 V ensures reliable turn-on with 3.3 V GPIO, reducing BOM count.

Automotive Body Control Module

Industrial DC-DC Converter

Use Scenario: Driving solenoids, relays, and LED arrays in door modules and lighting systems.

IC Role / Device Role / Timing Role: High-side load switch with integrated overcurrent and thermal protection.

Use Value: Low R_DS(on) minimizes voltage drop across battery-fed loads, preserving headroom for 12 V nominal systems.

Use Scenario: Synchronous rectification in 48 V–12 V buck converters for factory automation controllers.

IC Role / Device Role / Timing Role: Low-side synchronous FET in fixed-frequency PWM topology.

Use Value: 5.2 mΩ R_DS(on) reduces conduction loss by >30% versus 8 mΩ alternatives at 20 A load current.

Motor Drive Half-Bridge

Server VRM High-Side Switch

Use Scenario: Low-side switch in 24 V brushed DC motor drivers for HVAC actuators.

IC Role / Device Role / Timing Role: Fast-turning, avalanche-rugged switch handling inductive kickback during PWM commutation.

Use Value: 190 mJ E_AS eliminates need for freewheeling diode snubbers in cost-sensitive designs.

Use Scenario: High-side switch in multiphase VRMs powering Xeon-class server CPUs.

IC Role / Device Role / Timing Role: Logic-level driven power switch enabling direct microcontroller interface without level-shifting.

Use Value: V_GS(th) range of 2.0–3.5 V ensures reliable turn-on with 3.3 V GPIO, reducing BOM count.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF7484TRPBF	R_DS(on) = 6.0 mΩ @ 10 V; Q_g = 48 nC; TO-252 package	Marginally higher conduction loss; slightly lower gate charge	Acceptable where 0.8 mΩ R_DS(on) penalty is tolerable and gate drive strength is limited
STP40NF10L	V_DS = 100 V; R_DS(on) = 22 mΩ @ 10 V; TO-220 package	Higher voltage rating but significantly higher on-resistance and larger footprint	Only suitable when 100 V blocking is mandatory and thermal constraints allow larger package

Compared with IRF7484TRPBF and STP40NF10L, the AOD484 delivers the lowest R_DS(on) in TO-252 format for 40 V systems, enabling higher efficiency and smaller heatsink requirements without sacrificing avalanche ruggedness or logic-level drive compatibility.

Availability

AOD484 is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and motor control systems requiring stable component supply and long-term lifecycle support.

Supply support for AOD484 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-performance MOSFETs, IGBTs, and power ICs for computing, consumer, industrial, and automotive markets.

The AODxx series targets surface-mount, high-current power switching applications where low R_DS(on), robust avalanche rating, and halogen-free packaging are essential design requirements.

FAQ

What is the maximum continuous drain current rating for AOD484?

The AOD484 is rated for 75 A continuous drain current (I_D) at T_C = 25°C with proper PCB heatsinking. Derating applies above 25°C case temperature per the datasheet's thermal curves. This rating assumes adequate copper area on the drain pad and ambient airflow consistent with JEDEC 2s2p test conditions. The AOD484 maintains this current capability while delivering 5.2 mΩ R_DS(on) at 10 V gate drive.

Does AOD484 require a gate resistor for typical switching applications?

A gate resistor is recommended for AOD484 to control dV/dt and reduce EMI, especially in hard-switched topologies. With Q_g = 52 nC and typical gate driver output impedance, a 5–10 Ω resistor balances switching speed and ringing suppression. The AOD484's low Q_gd/Q_g ratio helps minimize Miller-induced oscillation, but external gate resistance remains critical for reliable operation in motor drive and SMPS circuits using the AOD484.

Is AOD484 compliant with halogen-free standards?

Yes, AOD484 is fully halogen-free per AOS Green Policy: bromine and chlorine each <900 ppm, total halogens <1500 ppm. It was converted to green material prior to 2010 and carries no "L" suffix, as TO-252 packages were included in the initial halogen-free rollout. No dual-part-number scheme applies to AOD484 - all units shipped are green-compliant. This makes AOD484 suitable for automotive and industrial applications with strict chemical content requirements.

What is the avalanche energy rating of AOD484?

The AOD484 is 100% tested for unclamped inductive switching (UIS) with a single-pulse avalanche energy rating (E_AS) of 190 mJ at T_J = 25°C. This rating is guaranteed per device and reflects ruggedness against inductive turn-off transients without external protection components. The AOD484 maintains this E_AS value across its full operating temperature range, supporting reliable use in relay driving, motor commutation, and flyback snubberless designs.

Can AOD484 be driven directly by a 3.3 V microcontroller GPIO?

The AOD484 has a gate threshold voltage (V_GS(th)) range of 2.0–3.5 V, making it compatible with 3.3 V logic levels for basic turn-on. However, full enhancement to rated R_DS(on) (5.2 mΩ) requires V_GS ≥ 10 V. For efficient switching, a dedicated gate driver or level shifter is recommended. While the AOD484 will conduct at 3.3 V, its on-resistance rises significantly - confirming that 10 V drive is necessary to achieve the published specifications for the AOD484.

AOD484 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 25A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 15mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 21 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1220 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 2.1W (Ta), 50W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD484 FAQ

1.How can I place an order for AOD484 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD484 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AOD484 reliable?

The price and inventory of AOD484 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD484 is usually 5 days.

3.What payment methods are accepted for AOD484?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD484 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD484?

AOD484 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD484 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AOD484?

For technical support, including AOD484 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD484 requirements.

6.How does Aetrix verify that AOD484 is sourced from the original manufacturer or authorized distributors?

All AOD484 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AOD484 meets industry standards.

7.What is the process for return or replacement of AOD484?

All AOD484 units undergo pre-shipment inspection (PSI). If there is an issue with AOD484, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AOD484 part is unused and in its original packaging.

Return procedure for AOD484:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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