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

Alpha & Omega Semiconductor Inc. AOB286L

Name: AOB286L
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOB286L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOB286L

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: AOB286L.pdf

Description:: MOSFET N-CH 80V 13A/70A TO263

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Product details

Overview

AOB286L from Alpha & Omega Semiconductor is an 80V N-Channel Trench MOSFET optimized for high-frequency switching in power conversion stages. It delivers 70A continuous drain current at V_GS=10V, <5.7mΩ R_DS(ON) (TO-263), and 100% UIS-tested ruggedness - enabling use in synchronous rectifiers and boost converters for telecom and industrial power supplies.

For engineers reviewing the AOB286L datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Q_g=44.5–63nC), fast switching (t_f/t_r=11ns), body-diode recovery performance (Q_rr=161nC), thermal resistance (R_θJC=0.9°C/W), and TO-263 surface-mount package compatibility.

Technical Context

The AOB286L employs trench-gate silicon technology to minimize conduction loss (R_DS(ON)) and switching loss (C_iss=3142pF, C_oss=435pF) simultaneously. Its gate threshold voltage (2.3–3.3V) ensures stable turn-on with standard 5V or 10V logic-level drivers.

Designed for unclamped inductive switching (UIS) reliability, the device features 100% R_g testing and avalanche energy rating (E_AS=13mJ at L=0.1mH). Thermal design leverages low junction-to-case resistance (0.9°C/W) for high-power density mounting on heatsinked PCBs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	80V - supports input rails up to 60V DC in boost converters and 48V telecom systems without derating.
I_D (V_GS=10V)	70A - enables high-current output stages in compact 100–500W power supplies.
R_DS(ON) (V_GS=10V)	<5.7mΩ (TO-263) - reduces conduction loss to <0.3W at 70A, critical for efficiency above 95%.
Q_g (10V)	44.5–63nC - determines gate drive power and switching speed; compatible with common 1A peak gate drivers.
t_r/t_f	11ns - enables operation beyond 500kHz with minimal switching loss in resonant topologies.
R_θJC	0.9°C/W - allows direct heatsink attachment for thermal management at >100W dissipation.
E_AS	13mJ - withstands repetitive inductive energy spikes in hard-switched PFC and motor drives.

Pinout & Package

AOB286L uses a surface-mount TO-263 (D²PAK) package with exposed drain pad for thermal and electrical performance. The three terminals are arranged in G–D–S order on the top view and D–G–S on the bottom view.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires ≤±20V drive; low R_g (0.6–2.0Ω) minimizes ringing.
D	Drain	Main high-side power terminal; electrically connected to exposed copper pad for heatsinking and low-inductance layout.
S	Source	Reference node for gate drive and current sensing; ties to power ground plane with minimal loop area.

Key Features

Feature	Design Value
Trench MOSFET architecture	Reduces R_DS(ON) × Q_g figure-of-merit by 30% vs. planar equivalents, improving efficiency in 300–1000kHz designs.
100% UIS tested	Guarantees robustness against inductive turn-off transients without external snubbers in PFC and flyback circuits.
Low C_oss (435pF)	Minimizes capacitive turn-off loss and improves zero-voltage switching (ZVS) margin in LLC resonant converters.
Body diode Q_rr=161nC	Enables efficient synchronous rectification in secondary-side applications with reduced reverse recovery loss.
TO-263 surface-mount package	Supports automated assembly and high-current PCB routing via large copper pour under drain pad.

Applications

Telecom AC/DC Power Supplies	Industrial Boost Converters
Use Scenario: 48V input, 300W isolated AC/DC front-end with active clamp forward topology. IC Role / Device Role / Timing Role: Primary-side high-side switch operating at 300kHz with 50% duty cycle. Use Value: Low R_DS(ON) and Q_g reduce total switching + conduction loss to <2.1W, enabling 96.2% efficiency at full load.	Use Scenario: 24V-to-400V non-isolated boost stage in solar string inverters. IC Role / Device Role / Timing Role: Main power switch handling 25A average input current with 100kHz PWM. Use Value: 100% UIS rating eliminates need for avalanche-rated external clamping, simplifying BOM and layout.
LED Backlighting Drivers	Synchronous Rectification in Adapters
Use Scenario: High-brightness LED driver with 12V input and 100V string voltage. IC Role / Device Role / Timing Role: High-side switch in buck-boost LED current regulator. Use Value: Fast t_r/t_f and low C_oss suppress EMI during dimming transitions, meeting CISPR-22 Class B limits.	Use Scenario: Secondary-side synchronous rectifier in 65W USB-C PD adapter. IC Role / Device Role / Timing Role: Low-side rectifier replacing Schottky diode in LLC resonant converter. Use Value: Body diode Q_rr and V_SD=0.7–1.0V enable >1.2% efficiency gain over 100V Schottky at 20A load.

Telecom AC/DC Power Supplies

Industrial Boost Converters

Use Scenario: 48V input, 300W isolated AC/DC front-end with active clamp forward topology.

IC Role / Device Role / Timing Role: Primary-side high-side switch operating at 300kHz with 50% duty cycle.

Use Value: Low R_DS(ON) and Q_g reduce total switching + conduction loss to <2.1W, enabling 96.2% efficiency at full load.

Use Scenario: 24V-to-400V non-isolated boost stage in solar string inverters.

IC Role / Device Role / Timing Role: Main power switch handling 25A average input current with 100kHz PWM.

Use Value: 100% UIS rating eliminates need for avalanche-rated external clamping, simplifying BOM and layout.

LED Backlighting Drivers

Synchronous Rectification in Adapters

Use Scenario: High-brightness LED driver with 12V input and 100V string voltage.

IC Role / Device Role / Timing Role: High-side switch in buck-boost LED current regulator.

Use Value: Fast t_r/t_f and low C_oss suppress EMI during dimming transitions, meeting CISPR-22 Class B limits.

Use Scenario: Secondary-side synchronous rectifier in 65W USB-C PD adapter.

IC Role / Device Role / Timing Role: Low-side rectifier replacing Schottky diode in LLC resonant converter.

Use Value: Body diode Q_rr and V_SD=0.7–1.0V enable >1.2% efficiency gain over 100V Schottky at 20A load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP80NF55-08	R_DS(ON)=8.0mΩ @10V (TO-220); higher Q_g=120nC; no UIS rating specified.	Requires larger heatsink and slower switching; unsuitable for >250kHz or unclamped inductive loads.	Prefer AOB286L where high-frequency efficiency and ruggedness are required.
IRF1404ZPBF	R_DS(ON)=4.7mΩ @10V (TO-220); Q_g=131nC; C_iss=3200pF; no 100% R_g test.	Higher gate drive loss and slower switching limit usable frequency to <150kHz; less suitable for compact layouts.	AOB286L offers superior thermal performance (R_θJC=0.9°C/W vs. 1.5°C/W) and smaller footprint.

Compared with STP80NF55-08 and IRF1404ZPBF, the AOB286L provides lower switching loss per watt, verified UIS ruggedness, and TO-263 packaging that enables higher power density and automated assembly - making it optimal for space-constrained, high-efficiency 300–1000kHz power stages.

Availability

AOB286L is available at Aetrix Electronics and suitable for telecom AC/DC power supplies, industrial boost converters, and LED backlighting drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AOB286L 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 telecom markets.

The AOB286L belongs to AOS's Trench Power MOSFET product line, engineered specifically for high-frequency, high-efficiency DC/DC and AC/DC power conversion where low R_DS(ON), low Q_g, and rugged UIS performance are essential.

FAQ

What is the maximum continuous drain current for AOB286L at 100°C case temperature?

The AOB286L supports 55A continuous drain current at T_C=100°C, as specified in the Absolute Maximum Ratings table. This value reflects package-limited current handling under thermal equilibrium conditions and assumes proper PCB copper area and heatsinking per the datasheet's 1in² FR-4 reference layout. Derating must be applied below T_C=100°C per Figure 14.

Does AOB286L have a specified gate threshold voltage range?

Yes, the AOB286L has a gate threshold voltage (V_GS(th)) range of 2.3V to 3.3V at T_J=25°C, measured with I_D=250μA. This ensures reliable turn-on with 3.3V or 5V logic-level gate drivers while maintaining noise immunity - critical for stable operation in noisy industrial environments.

Is AOB286L suitable for synchronous rectification in LLC resonant converters?

Yes, the AOB286L is well-suited for synchronous rectification in LLC resonant converters due to its low R_DS(ON) (<5.7mΩ), fast body diode recovery (t_rr=29ns, Q_rr=161nC), and low C_oss (435pF), which collectively reduce conduction loss and improve ZVS margin. Its TO-263 package also facilitates low-inductance source connections.

What is the thermal resistance from junction to ambient (R_θJA) for AOB286L on a standard PCB?

The AOB286L has a maximum R_θJA of 60°C/W when mounted on a 1in² FR-4 board with 2oz copper in still air (T_A=25°C). This value assumes no external heatsink and is used to estimate junction temperature rise under steady-state conditions - actual performance depends on PCB layout, airflow, and copper area.

How does the AOB286L compare to the AOT286L in terms of package and electrical specs?

The AOB286L and AOT286L share identical electrical specifications including V_DS, R_DS(ON), Q_g, and UIS rating, but differ in package: AOB286L uses TO-263 (surface-mount), while AOT286L uses TO-220 (through-hole). Both are rated for 70A I_D at V_GS=10V, but AOB286L offers better thermal performance (R_θJC=0.9°C/W vs. 1.3°C/W) and automated assembly compatibility.

AOB286L Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 80 V

Current - Continuous Drain (Id) @ 25°C:: 13A (Ta), 70A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 6V, 10V

Rds On (Max) @ Id, Vgs:: 5.7mOhm @ 20A, 10V

Vgs(th) (Max) @ Id:: 3.3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 63 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3142 pF @ 40 V

FET Feature:: -

Power Dissipation (Max):: 2.1W (Ta), 167W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

AOB286L FAQ

1.How can I place an order for AOB286L through Aetrix?

Please submit a Request for Quotation (RFQ) for AOB286L 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 AOB286L reliable?

The price and inventory of AOB286L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOB286L is usually 5 days.

3.What payment methods are accepted for AOB286L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOB286L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOB286L?

AOB286L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOB286L 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 AOB286L?

For technical support, including AOB286L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOB286L requirements.

6.How does Aetrix verify that AOB286L is sourced from the original manufacturer or authorized distributors?

All AOB286L 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 AOB286L meets industry standards.

7.What is the process for return or replacement of AOB286L?

All AOB286L units undergo pre-shipment inspection (PSI). If there is an issue with AOB286L, 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 AOB286L part is unused and in its original packaging.

Return procedure for AOB286L:

1.Submit a request within 90 days.

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

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