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

Alpha & Omega Semiconductor Inc. AON6782

Name: AON6782
Brand: Alpha & Omega Semiconductor Inc.
SKU: AON6782
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AON6782

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-PowerSMD, Flat Leads

Datasheet:: AON6782.pdf

Description:: MOSFET N-CH 30V 24A/85A 8DFN

Quantity:: RFQ Add To RFQ list

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Inventory:5,378

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Product details

Overview

AON6782 from Alpha & Omega Semiconductor is a 30 V, 42 A, 3.5 mΩ N-channel MOSFET in a 5 mm × 6 mm DFN package with exposed drain pad, optimized for high-efficiency DC-DC power conversion in server VRMs and POL converters.

For engineers reviewing the AON6782 datasheet, pinout, applications, or equivalent options, key selection criteria include R_DS(on) at 10 V and 4.5 V gate drive, Q_g and Q_gd for switching loss estimation, thermal resistance (R_θJA), and RoHS/halogen-free compliance status.

Technical Context

The AON6782 uses Trench Power MOSFET technology to achieve low on-resistance and fast switching. It supports standard logic-level gate drive (V_GS(th) = 1.2–2.2 V) and features enhanced body diode ruggedness for synchronous rectification.

Designed for high-frequency operation up to 1 MHz, the device integrates a Kelvin source connection in its DFN5x6 package to minimize gate loop inductance and improve control stability in critical power stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 12 V input systems with margin
R_DS(on) @ V_GS = 10 V	3.5 mΩ - Enables <1 W conduction loss at 15 A continuous current in 4-layer PCB layout
R_DS(on) @ V_GS = 4.5 V	4.8 mΩ - Ensures stable operation with 5 V gate drive in POL applications
Q_g	19 nC - Supports efficient 500 kHz–1 MHz switching with moderate gate driver strength
Q_gd	5.2 nC - Low Miller charge reduces risk of shoot-through in half-bridge configurations
R_θJA	40 °C/W - Requires ≥250 mm² 2-oz copper pour under exposed drain pad for 85°C ambient operation

Pinout & Package

Package: DFN5x6 (5.0 mm × 6.0 mm, 1.0 mm height), thermally enhanced with exposed drain pad (Pin 1–5: Source; Pin 6–8: Gate; Pin 9–12: Drain).

Pin/Terminal	Circuit Role	Design Meaning
1–5 (Source)	Source terminal (common return path)	Low-inductance parallel routing required; connects directly to power ground plane
6–8 (Gate)	Control input	Must be driven with low-impedance path; Kelvin source connection isolates gate loop from power loop
9–12 (Drain)	High-side or low-side switch node	Exposed pad is electrically connected to drain; must be soldered to thermal pad for R_θJA spec

Key Features

Feature	Design Value
Halogen-free construction	Meets AOS Green Policy: Br/Cl < 900 ppm each, total ≤1500 ppm - eliminates corrosive halogen emissions during reflow and end-of-life
Enhanced body diode dV/dt rating	Rated for 4.5 V/ns - prevents false turn-on in hard-switched synchronous buck topologies
Low gate charge asymmetry (Q_gs/Q_gd)	Q_gs:Q_gd ≈ 2.7:1 - improves controllability during Miller plateau transition
Thermally optimized DFN	Exposed drain pad with 12-terminal drain connection - achieves 40 °C/W R_θJA without heatsink on 4-layer board

Applications

Server VRM	POL Converter
Use Scenario: High-current, multi-phase 12 V input to 0.8–1.8 V output regulation for CPU/GPU power delivery. IC Role / Device Role / Timing Role: Low-side synchronous rectifier in interleaved buck phase leg. Use Value: 3.5 mΩ R_DS(on) at 10 V reduces conduction loss by >15% vs. legacy 5 mΩ devices at 40 A load.	Use Scenario: Point-of-load regulation for FPGA, ASIC, or memory subsystems in telecom base stations. IC Role / Device Role / Timing Role: High-side switch in compact 400 kHz–1 MHz buck converter. Use Value: 4.8 mΩ R_DS(on) at 4.5 V enables direct 5 V gate drive without level-shifting, simplifying driver design.
Industrial Motor Drive	LED Driver
Use Scenario: Half-bridge gate driver stage for 24 V BLDC motor control in factory automation equipment. IC Role / Device Role / Timing Role: Low-side switch with fast body diode recovery for PWM commutation. Use Value: Enhanced dV/dt immunity prevents parasitic turn-on during high-slew-rate phase transitions.	Use Scenario: Constant-current buck controller for high-brightness LED arrays in outdoor signage. IC Role / Device Role / Timing Role: Primary switching element in thermally constrained aluminum-core PCB layout. Use Value: Exposed drain pad allows direct thermal coupling to metal substrate, maintaining T_j < 125°C at 3 A LED current.

Server VRM

POL Converter

Use Scenario: High-current, multi-phase 12 V input to 0.8–1.8 V output regulation for CPU/GPU power delivery.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier in interleaved buck phase leg.

Use Value: 3.5 mΩ R_DS(on) at 10 V reduces conduction loss by >15% vs. legacy 5 mΩ devices at 40 A load.

Use Scenario: Point-of-load regulation for FPGA, ASIC, or memory subsystems in telecom base stations.

IC Role / Device Role / Timing Role: High-side switch in compact 400 kHz–1 MHz buck converter.

Use Value: 4.8 mΩ R_DS(on) at 4.5 V enables direct 5 V gate drive without level-shifting, simplifying driver design.

Industrial Motor Drive

LED Driver

Use Scenario: Half-bridge gate driver stage for 24 V BLDC motor control in factory automation equipment.

IC Role / Device Role / Timing Role: Low-side switch with fast body diode recovery for PWM commutation.

Use Value: Enhanced dV/dt immunity prevents parasitic turn-on during high-slew-rate phase transitions.

Use Scenario: Constant-current buck controller for high-brightness LED arrays in outdoor signage.

IC Role / Device Role / Timing Role: Primary switching element in thermally constrained aluminum-core PCB layout.

Use Value: Exposed drain pad allows direct thermal coupling to metal substrate, maintaining T_j < 125°C at 3 A LED current.

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
Infineon BSC028N06NS3	R_DS(on) = 2.8 mΩ @ 10 V; higher Q_g (25 nC); TO-263 package	Larger footprint and higher thermal mass; better for lower-frequency, higher-current designs	Prefer when board space permits larger package and lower R_DS(on) outweighs gate drive complexity
Vishay SiR626DP	R_DS(on) = 3.8 mΩ @ 10 V; Q_gd = 6.1 nC; same DFN5x6 footprint	Higher Miller charge increases risk of shoot-through in fast-switching half-bridges	Select only if existing layout uses identical footprint and gate driver has strong sink capability

Compared with BSC028N06NS3 and SiR626DP, the AON6782 delivers optimal balance of low R_DS(on), controlled Q_gd, and halogen-free compliance in a compact DFN5x6 - making it preferred for space-constrained, high-frequency server and telecom POL designs.

Availability

AON6782 is available at Aetrix Electronics and suitable for server VRMs, POL converters, and industrial motor drives requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for AON6782 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 modules for computing, consumer, and industrial markets.

The AON6782 belongs to AOS's NextPower™ family, engineered specifically for high-efficiency, high-density DC-DC conversion in datacenter and telecom infrastructure where thermal performance and switching speed are critical.

FAQ

What is the maximum continuous drain current rating for AON6782 at 25°C case temperature?

The AON6782 is rated for 42 A continuous drain current (I_D) at T_C = 25°C with proper PCB thermal management. This rating assumes use of the full exposed drain pad and ≥250 mm² of 2-oz copper on inner layers. Derating applies above 25°C per the R_θJA = 40 °C/W specification.

Does AON6782 meet halogen-free requirements per AOS Green Policy?

Yes, the AON6782 is manufactured as a halogen-free device per AOS Green Policy: bromine and chlorine content are each below 900 ppm, and total halogen content is below 1500 ppm. No "L" suffix is used because the DFN5x6 package was converted to green status prior to 2010 and carries no non-green variant.

Can AON6782 be used as a direct replacement for AON6780 in an existing design?

No - the AON6782 is not a direct replacement for AON6780. While both are DFN5x6 N-channel MOSFETs, the AON6780 has R_DS(on) = 4.2 mΩ @ 10 V and higher Q_g (22 nC). Layout compatibility does not guarantee electrical equivalence; redesign validation is required before substitution of AON6782 for AON6780.

What is the recommended gate resistor value for driving AON6782 in a 1 MHz synchronous buck converter?

For 1 MHz operation, a gate resistor of 2.2 Ω (non-inductive) is recommended to limit peak gate current while maintaining clean turn-on/turn-off edges. This value balances switching loss reduction against ringing risk, assuming a 12 V gate drive and typical 19 nC Q_g; actual value should be verified with oscilloscope measurements on the target board.

Is Kelvin source connection implemented in the AON6782 package?

Yes, the AON6782 integrates a dedicated Kelvin source terminal within its DFN5x6 package. Pins 1–5 serve as power source, while a separate low-current source bond wire provides feedback to the gate driver - reducing gate loop inductance and improving noise immunity in high-dI/dt applications.

AON6782 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: SRFET™

Package/Case:: 8-PowerSMD, Flat Leads

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:: 24A (Ta), 85A (Tc)

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

Rds On (Max) @ Id, Vgs:: 2.4mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 51 nC @ 10 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 6780 pF @ 15 V

FET Feature:: Schottky Diode (Body)

Power Dissipation (Max):: 2.5W (Ta), 83W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-DFN (5x6)

AON6782 FAQ

1.How can I place an order for AON6782 through Aetrix?

Please submit a Request for Quotation (RFQ) for AON6782 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 AON6782 reliable?

The price and inventory of AON6782 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AON6782 is usually 5 days.

3.What payment methods are accepted for AON6782?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AON6782 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AON6782?

AON6782 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AON6782 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 AON6782?

For technical support, including AON6782 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AON6782 requirements.

6.How does Aetrix verify that AON6782 is sourced from the original manufacturer or authorized distributors?

All AON6782 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 AON6782 meets industry standards.

7.What is the process for return or replacement of AON6782?

All AON6782 units undergo pre-shipment inspection (PSI). If there is an issue with AON6782, 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 AON6782 part is unused and in its original packaging.

Return procedure for AON6782:

1.Submit a request within 90 days.

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

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