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

Alpha & Omega Semiconductor Inc. AOT600A70FL

Name: AOT600A70FL
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOT600A70FL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOT600A70FL

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: AOT600A70FL.pdf

Description:: MOSFET N-CH 700V 8.5A TO220

Quantity:: RFQ Add To RFQ list

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Inventory:3,269

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Product details

Overview

AOT600A70FL from Alpha & Omega Semiconductor is a 700 V, 34 A N-channel power MOSFET in TO-220 package, featuring R_DS(ON) ≤ 0.6 Ω at V_GS = 10 V, 14.5 nC total gate charge, and 100% UIS-tested ruggedness. It serves as a primary switching device in high-voltage flyback converters for PD adapters and LED lighting.

For engineers reviewing the AOT600A70FL datasheet, pinout, applications, or equivalent options, key selection criteria include its 800 V V_DS absolute maximum rating, 1.2 °C/W junction-to-case thermal resistance, 260 ns body diode reverse recovery time, and aMOS5™ technology–enabled EMI optimization.

Technical Context

The AOT600A70FL employs proprietary aMOS5™ trench-gate process to achieve low R_DS(ON) while maintaining high voltage blocking capability. Its optimized output capacitance profile (C_oss = 23 pF, C_o(er) = 22 pF) and fast switching parameters (t_d(on) = 20 ns, t_f = 8 ns) support efficient hard-switched SMPS topologies.

Thermal design is enabled by validated transient impedance curves (Figure 14) and a low R_θJC of 1.2 °C/W. The device integrates an enhanced body diode with 3.5 mC Q_rr, 20 A I_RM, and 100% R_g-tested robustness for reliable unclamped inductive switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	700 V rated, 800 V absolute max - supports 400 V DC bus designs with ≥2× safety margin
R_DS(ON)	≤ 0.6 Ω @ V_GS = 10 V, T_J = 25°C - enables <1.5 W conduction loss at 2.5 A RMS
Q_g	14.5 nC typ - determines gate drive power and switching loss in 65–100 kHz flyback designs
E_oss	1.9 mJ @ 400 V - defines turn-off energy loss and impacts snubber sizing
T_J Range	−55°C to +150°C - qualified for industrial ambient and thermally constrained enclosures
R_θJC	1.2 °C/W - allows direct heatsink mounting with predictable junction temperature rise
t_rr	260 ns - sets minimum dead-time requirement in synchronous rectification or resonant topologies

Pinout & Package

Package: TO-220 (3-lead, straight lead, green halogen-free). Mounting tab is electrically connected to drain (D).

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control terminal; requires 10 V min for full enhancement; 2 Ω internal gate resistance limits dV/dt-induced ringing
D	Drain	Main current path; tied to metal tab - must be isolated from heatsink unless system ground referenced
S	Source	Reference node for gate drive; connects to power ground or low-side switch node in flyback primary

Key Features

Feature	Design Value
aMOS5™ trench technology	Enables 0.53 Ω typical R_DS(ON) at 700 V rating - reduces conduction loss vs. planar alternatives
Enhanced body diode	260 ns t_rr, 3.5 mC Q_rr, and 100% UIS tested - improves reliability in discontinuous conduction mode (DCM) flyback
Optimized switching parameters	14.5 nC Q_g, 2.6 nC Q_gd, and 8 ns t_r/t_f - lowers EMI and enables clean 100 kHz operation without excessive filtering
Thermal performance	1.2 °C/W R_θJC and normalized Z_θJC curves (Fig. 14) - supports accurate transient thermal modeling for peak-load derating

Applications

Flyback SMPS Primary Switch	USB PD Adapter Power Stage
Use Scenario: High-efficiency 65 W flyback converter operating at 65–100 kHz with 400 V DC input. IC Role / Device Role / Timing Role: Main high-side switching transistor controlling energy transfer via transformer primary winding. Use Value: Low R_DS(ON) and optimized C_oss reduce conduction and turn-off losses; 100% UIS testing ensures survival during output short-circuit events.	Use Scenario: Compact dual-port USB PD charger with GaN-assisted PFC + flyback architecture. IC Role / Device Role / Timing Role: Secondary-stage high-voltage switch in isolated flyback output stage delivering 20 V/3.25 A. Use Value: Fast body diode recovery (260 ns) minimizes cross-conduction loss; TO-220 package enables cost-effective thermal management without custom PCB copper pours.
LED Lighting Driver	Industrial AC-DC Power Supply
Use Scenario: Constant-current LED driver for commercial downlights with universal 90–264 VAC input. IC Role / Device Role / Timing Role: Primary-side switch in quasi-resonant (QR) flyback topology regulating LED string current. Use Value: 800 V V_DS rating accommodates line surge transients; low Q_g enables simple bipolar gate drive with minimal external components.	Use Scenario: 48 V/5 A industrial control power supply requiring long-term reliability under 60°C ambient. IC Role / Device Role / Timing Role: Main switching element in fixed-frequency flyback supplying isolated logic and sensor rails. Use Value: −55°C to +150°C T_J range and 100% R_g testing ensure stable operation across extended temperature cycles and mechanical stress.

Flyback SMPS Primary Switch

USB PD Adapter Power Stage

Use Scenario: High-efficiency 65 W flyback converter operating at 65–100 kHz with 400 V DC input.

IC Role / Device Role / Timing Role: Main high-side switching transistor controlling energy transfer via transformer primary winding.

Use Value: Low R_DS(ON) and optimized C_oss reduce conduction and turn-off losses; 100% UIS testing ensures survival during output short-circuit events.

Use Scenario: Compact dual-port USB PD charger with GaN-assisted PFC + flyback architecture.

IC Role / Device Role / Timing Role: Secondary-stage high-voltage switch in isolated flyback output stage delivering 20 V/3.25 A.

Use Value: Fast body diode recovery (260 ns) minimizes cross-conduction loss; TO-220 package enables cost-effective thermal management without custom PCB copper pours.

LED Lighting Driver

Industrial AC-DC Power Supply

Use Scenario: Constant-current LED driver for commercial downlights with universal 90–264 VAC input.

IC Role / Device Role / Timing Role: Primary-side switch in quasi-resonant (QR) flyback topology regulating LED string current.

Use Value: 800 V V_DS rating accommodates line surge transients; low Q_g enables simple bipolar gate drive with minimal external components.

Use Scenario: 48 V/5 A industrial control power supply requiring long-term reliability under 60°C ambient.

IC Role / Device Role / Timing Role: Main switching element in fixed-frequency flyback supplying isolated logic and sensor rails.

Use Value: −55°C to +150°C T_J range and 100% R_g testing ensure stable operation across extended temperature cycles and mechanical stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK80ZFP	800 V V_DS, R_DS(ON) = 0.85 Ω, Q_g = 25 nC, TO-220FP package	Higher R_DS(ON) and gate charge increase conduction and switching losses in 65+ kHz designs	Preferred where lower cost outweighs efficiency loss; requires larger heatsink due to higher R_θJA
IXTP50N10D2	100 V V_DS, R_DS(ON) = 0.022 Ω, Q_g = 45 nC, TO-220 package	Not voltage-rated for 400 V bus - unsuitable for universal-input SMPS without redesign	Only viable in low-voltage auxiliary supplies or post-regulation stages; not a functional substitute

Compared with STP7NK80ZFP and IXTP50N10D2, the AOT600A70FL delivers superior efficiency in 700 V-class flyback converters due to its lower R_DS(ON) and gate charge, while maintaining proven ruggedness for industrial-grade reliability without requiring layout changes.

Availability

AOT600A70FL is available at Aetrix Electronics and suitable for USB PD adapters, LED lighting drivers, and industrial AC-DC power supplies requiring stable component supply and long-lifecycle support.

Supply support for AOT600A70FL 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, and industrial markets.

The AOT600A70FL belongs to AOS's aMOS5™ high-voltage MOSFET product line, engineered specifically for efficiency-critical, high-reliability flyback and resonant converters in compact power adapters and lighting systems.

FAQ

What is the maximum continuous drain current rating for AOT600A70FL at 100°C case temperature?

The AOT600A70FL supports 2.2 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This value is derived from thermal derating based on R_θJC = 1.2 °C/W and T_J(MAX) = 150°C. At lower case temperatures, current capability increases - e.g., 34 A at T_C = 25°C - but real-world operation must respect both thermal and SOA limits shown in Figures 11 and 12.

Does AOT600A70FL have a built-in gate resistor, and what is its value?

Yes, the AOT600A70FL includes an integrated 2 Ω gate resistor, confirmed in the Electrical Characteristics table under "Gate resistance" (R_g). This internal resistor helps dampen gate oscillation and reduces external component count in basic gate drive circuits. It does not replace the need for proper gate driver strength when driving at high frequency or with capacitive loads.

Is AOT600A70FL suitable for use in quasi-resonant (QR) flyback converters?

Yes, the AOT600A70FL is well-suited for QR flyback converters due to its 260 ns body diode reverse recovery time, low Q_gd/Q_g ratio (0.18), and 100% UIS-tested ruggedness. These characteristics enable reliable zero-voltage switching (ZVS) detection and minimize turn-on loss during valley switching. Its 700 V rating also provides headroom for reflected voltage spikes in QR operation.

What is the difference between AOT600A70FL and AOTF600A70FL listed in the datasheet?

The AOT600A70FL uses a standard TO-220 package, while the AOTF600A70FL uses the TO-220F (full-pack) variant with insulated tab. Both share identical electrical specifications, thermal parameters (R_θJC = 1.2 °C/W for AOT600A70FL, 4.7 °C/W for AOTF600A70FL), and test data. The AOT600A70FL requires electrical isolation between tab and heatsink; the AOTF600A70FL does not.

Can AOT600A70FL replace older 600 V MOSFETs like STP6NK60Z in existing designs?

The AOT600A70FL can serve as a higher-voltage upgrade to 600 V devices such as STP6NK60Z, offering 700 V rating and lower R_DS(ON) (0.6 Ω vs. 0.75 Ω). However, it is not a drop-in replacement due to differences in gate charge (14.5 nC vs. 27 nC) and SOA curves. Layout review and gate drive validation are required before substitution in legacy designs.

AOT600A70FL Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: aMOS5™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 700 V

Current - Continuous Drain (Id) @ 25°C:: 8.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 600mOhm @ 2.5A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14.5 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 900 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 104W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

AOT600A70FL FAQ

1.How can I place an order for AOT600A70FL through Aetrix?

Please submit a Request for Quotation (RFQ) for AOT600A70FL 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 AOT600A70FL reliable?

The price and inventory of AOT600A70FL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOT600A70FL is usually 5 days.

3.What payment methods are accepted for AOT600A70FL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOT600A70FL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOT600A70FL?

AOT600A70FL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOT600A70FL 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 AOT600A70FL?

For technical support, including AOT600A70FL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOT600A70FL requirements.

6.How does Aetrix verify that AOT600A70FL is sourced from the original manufacturer or authorized distributors?

All AOT600A70FL 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 AOT600A70FL meets industry standards.

7.What is the process for return or replacement of AOT600A70FL?

All AOT600A70FL units undergo pre-shipment inspection (PSI). If there is an issue with AOT600A70FL, 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 AOT600A70FL part is unused and in its original packaging.

Return procedure for AOT600A70FL:

1.Submit a request within 90 days.

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

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