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

Alpha & Omega Semiconductor Inc. AO4292E

Name: AO4292E
Brand: Alpha & Omega Semiconductor Inc.
SKU: AO4292E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AO4292E

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AO4292E.pdf

Description:: MOSFET N-CH 100V 8A 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AO4292E from Alpha & Omega Semiconductor is a 100V, 8A N-channel MOSFET in SOIC-8 package, featuring R_DS(ON) < 23 mΩ at V_GS = 10 V and < 33 mΩ at V_GS = 4.5 V, with 100% UIS and R_g tested, optimized for synchronous rectification in DC/DC converters.

For engineers reviewing the AO4292E datasheet, pinout, applications, or equivalent options, key selection considerations include its low gate charge (Q_g(10V) = 25 nC), fast switching (t_r = 3 ns, t_f = 3 ns), HBM Class 2 ESD rating, avalanche energy rating (E_AS = 10 mJ), and thermal resistance (R_θJA = 75 °C/W).

Technical Context

The AO4292E employs Trench Power MV MOSFET technology to achieve low R_DS(ON) and low gate charge, enabling high-efficiency operation in hard-switched topologies. Its body diode exhibits V_SD = 0.72 V (typ) at I_S = 1 A and Q_rr = 80 nC under IF = 8 A, dI/dt = 500 A/ms conditions.

Designed for fast-switching applications, it supports gate drive voltages from 4.5 V to 10 V, delivers g_FS = 30 S (typ), and maintains stable R_DS(ON) across junction temperatures up to 150 °C - validated by normalized on-resistance vs. temperature curves.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - supports input rails up to 80 V DC in buck, flyback, and half-bridge topologies without derating.
I_D (V_GS = 10 V)	8 A - continuous conduction capability at T_A = 70 °C with SOIC-8 board layout per JEDEC standards.
R_DS(ON) (V_GS = 10 V)	< 23 mΩ - enables <1.8 W conduction loss at 8 A, critical for high-current synchronous rectifiers.
Q_g(10V)	25 nC - reduces gate drive power and enables >1 MHz switching with standard 3–5 V logic-level drivers.
E_AS	10 mJ - ensures robustness against unclamped inductive switching events in motor drive and converter circuits.
R_θJA	75 °C/W - defines thermal limit of 100 W max dissipation at T_A = 25 °C, assuming 1 in² 2 oz copper FR-4 PCB.
t_r/t_f	3 ns / 3 ns - minimizes switching transition time, reducing overlap losses in synchronous rectification stages.

Pinout & Package

AO4292E is housed in a standard SOIC-8 (SO-8) surface-mount package with exposed drain pads on pins 1–4 and 6–8, source on pins 5 and 7, and gate on pin 3 - confirmed via manufacturer top/bottom view diagrams and thermal pad configuration.

Pin/Terminal	Circuit Role	Design Meaning
1,2,3,4,6,7,8	Drain (D)	High-current output node; pins 1–4 and 6–8 are internally paralleled for low-inductance, high-current path to heatsink via PCB copper.
5,7	Source (S)	Power return path; pin 5 and pin 7 are common-source terminals tied to ground plane for minimal loop inductance.
3	Gate (G)	Control input; isolated from drain/source by oxide layer; requires ≤ ±20 V gate drive with 1.6–2.7 V threshold.

Key Features

Feature	Design Value
Trench Power MV MOSFET architecture	Enables 100 V breakdown with sub-25 mΩ R_DS(ON), balancing voltage rating and conduction efficiency.
100% UIS tested	Guarantees single-pulse avalanche energy handling up to 10 mJ - eliminates need for external snubbers in inductive loads.
Low Q_g(4.5V) = 14 nC (max)	Supports direct interfacing with 3.3 V or 5 V microcontrollers and gate drivers without level-shifting circuitry.
HBM Class 2 ESD protection	Withstands ≥2 kV human-body-model discharge - improves manufacturing yield and field reliability in automated assembly lines.
RoHS and Halogen-Free compliant	Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances.

Applications

Server VRM Synchronous Rectifier	Industrial DC/DC Converter
Use Scenario: High-density 12 V → 1.2 V point-of-load conversion in data center servers using multiphase buck regulators. IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diodes to reduce conduction loss and improve efficiency above 90%. Use Value: Sub-23 mΩ R_DS(ON) cuts rectifier loss by >60% vs. 40 V Schottky, directly improving thermal margin and power density.	Use Scenario: Isolated 48 V input to 12 V/24 V output DC/DC module for PLC and sensor interface power supplies. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in forward or LLC resonant converters operating at 200–500 kHz. Use Value: Fast 3 ns rise/fall times minimize dead-time losses; Q_rr = 80 nC ensures clean body-diode commutation during ZVS transitions.
Brushless DC Motor Drive	AC/DC Adapter Primary-Side Switch
Use Scenario: Half-bridge leg in 24–48 V BLDC motor controllers for HVAC blowers and industrial fans. IC Role / Device Role / Timing Role: High-side or low-side switching element in 3-phase inverter stage, driven by gate driver IC. Use Value: 100% R_g tested ensures consistent gate resistance (0.5–1.5 Ω), enabling predictable turn-on/turn-off timing and reduced shoot-through risk.	Use Scenario: Primary-side switch in 65 W universal-input AC/DC adapters using QR flyback topology. IC Role / Device Role / Timing Role: Main power switch subjected to repetitive 100 V drain spikes during demagnetization. Use Value: 100 V BVDSS with 10 mJ E_AS withstands transient overvoltage without clamping, simplifying transformer design and reducing component count.

Server VRM Synchronous Rectifier

Industrial DC/DC Converter

Use Scenario: High-density 12 V → 1.2 V point-of-load conversion in data center servers using multiphase buck regulators.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diodes to reduce conduction loss and improve efficiency above 90%.

Use Value: Sub-23 mΩ R_DS(ON) cuts rectifier loss by >60% vs. 40 V Schottky, directly improving thermal margin and power density.

Use Scenario: Isolated 48 V input to 12 V/24 V output DC/DC module for PLC and sensor interface power supplies.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in forward or LLC resonant converters operating at 200–500 kHz.

Use Value: Fast 3 ns rise/fall times minimize dead-time losses; Q_rr = 80 nC ensures clean body-diode commutation during ZVS transitions.

Brushless DC Motor Drive

AC/DC Adapter Primary-Side Switch

Use Scenario: Half-bridge leg in 24–48 V BLDC motor controllers for HVAC blowers and industrial fans.

IC Role / Device Role / Timing Role: High-side or low-side switching element in 3-phase inverter stage, driven by gate driver IC.

Use Value: 100% R_g tested ensures consistent gate resistance (0.5–1.5 Ω), enabling predictable turn-on/turn-off timing and reduced shoot-through risk.

Use Scenario: Primary-side switch in 65 W universal-input AC/DC adapters using QR flyback topology.

IC Role / Device Role / Timing Role: Main power switch subjected to repetitive 100 V drain spikes during demagnetization.

Use Value: 100 V BVDSS with 10 mJ E_AS withstands transient overvoltage without clamping, simplifying transformer design and reducing component count.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Infineon IPP040N10N5	R_DS(ON) = 3.8 mΩ @ 10 V (lower), but in TO-220 package - higher thermal resistance (R_θJA ≈ 62 °C/W on 1 in² board) and larger footprint.	Preferred for lower-power, cost-sensitive industrial SMPS where PCB space is not constrained and heatsinking is discrete.	Select IPP040N10N5 only when board area allows TO-220 mounting and thermal design accommodates higher R_θJA.
Vishay SI7850DP-T1-GE3	R_DS(ON) = 24 mΩ @ 10 V (slightly higher), SO-8 package, Q_g = 28 nC (higher), no 100% UIS test documented in datasheet.	Suitable for non-critical consumer DC/DC where avalanche ruggedness is not required and gate drive capability is ample.	Choose SI7850DP-T1-GE3 if AO4292E's UIS guarantee is unnecessary and minor efficiency trade-off is acceptable.

Compared with IPP040N10N5 and SI7850DP-T1-GE3, the AO4292E uniquely combines SO-8 form factor, guaranteed UIS testing, and sub-25 mΩ R_DS(ON) - making it optimal for space-constrained, high-reliability synchronous rectification where board-level ruggedness and thermal performance are jointly critical.

Availability

AO4292E is available at Aetrix Electronics and suitable for server VRM designs, industrial DC/DC converters, and BLDC motor drives requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for AO4292E 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, industrial, and automotive markets.

The AO4292E belongs to AOS' Trench Power MV MOSFET product line, engineered specifically for high-frequency, high-efficiency power conversion in compact, thermally demanding environments such as server VRMs and industrial power supplies.

FAQ

What is the maximum continuous drain current for AO4292E at 70°C ambient temperature?

The AO4292E supports 8 A continuous drain current at T_A = 70 °C when mounted on a 1 in² FR-4 board with 2 oz copper, per its Absolute Maximum Ratings table. This rating assumes steady-state thermal equilibrium and accounts for R_θJA = 75 °C/W and T_J(MAX) = 150 °C. Derating applies beyond 70 °C ambient.

Does AO4292E have built-in ESD protection, and what level is specified?

Yes, the AO4292E features typical HBM Class 2 ESD protection, meaning it is rated to withstand ≥2 kV electrostatic discharge per the Human Body Model. This is verified during wafer sort and final test, enhancing robustness during PCB assembly and handling without requiring external protection components.

Can AO4292E be used with 4.5 V gate drive in logic-level applications?

Yes, the AO4292E is fully characterized at V_GS = 4.5 V, delivering R_DS(ON) < 33 mΩ and Q_g(4.5V) ≤ 14 nC. Its gate threshold voltage range (1.6–2.7 V) ensures reliable turn-on with standard 3.3 V or 5 V logic outputs, eliminating need for gate boosters in many low-voltage control systems.

Is AO4292E suitable for avalanche-prone circuits like motor drives?

Yes - the AO4292E is 100% UIS tested and rated for E_AS = 10 mJ (L = 0.1 mH). This makes it appropriate for inductive load switching in BLDC motor half-bridges and other applications where unclamped inductive energy must be safely absorbed within the MOSFET itself.

What is the thermal resistance from junction to ambient (RθJA) for AO4292E under standard test conditions?

The AO4292E has R_θJA = 75 °C/W when mounted on a 1 in² FR-4 board with 2 oz copper in still air at T_A = 25 °C. This value is used to calculate maximum allowable power dissipation (P_D = 100 W) and junction temperature rise. Actual R_θJA in end equipment depends on PCB layout and airflow.

AO4292E Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

Current - Continuous Drain (Id) @ 25°C:: 8A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AO4292E FAQ

1.How can I place an order for AO4292E through Aetrix?

Please submit a Request for Quotation (RFQ) for AO4292E 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 AO4292E reliable?

The price and inventory of AO4292E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4292E is usually 5 days.

3.What payment methods are accepted for AO4292E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4292E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AO4292E?

AO4292E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AO4292E 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 AO4292E?

For technical support, including AO4292E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4292E requirements.

6.How does Aetrix verify that AO4292E is sourced from the original manufacturer or authorized distributors?

All AO4292E 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 AO4292E meets industry standards.

7.What is the process for return or replacement of AO4292E?

All AO4292E units undergo pre-shipment inspection (PSI). If there is an issue with AO4292E, 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 AO4292E part is unused and in its original packaging.

Return procedure for AO4292E:

1.Submit a request within 90 days.

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

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