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

Alpha & Omega Semiconductor Inc. AOTF600A70FL

Name: AOTF600A70FL
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOTF600A70FL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOTF600A70FL

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: AOTF600A70FL.pdf

Description:: MOSFET N-CH 700V 8.5A TO220F

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Product details

Overview

AOTF600A70FL from Alpha & Omega Semiconductor is a 700 V, 34 A N-channel enhancement-mode MOSFET in TO-220F package, featuring R_DS(ON) ≤ 0.6 Ω at V_GS = 10 V, 14.5 nC total gate charge, and 100% UIS-tested ruggedness for high-voltage flyback and PD adapter primary-side switching.

For engineers reviewing the AOTF600A70FL datasheet, pinout, applications, or equivalent options, key selection criteria include its 800 V V_DSS rating, 4.7 °C/W junction-to-case thermal resistance, optimized EMI performance via aMOS5™ technology, and enhanced body diode with 260 ns reverse recovery time.

Technical Context

The AOTF600A70FL employs proprietary aMOS5™ trench-gate process to achieve low conduction loss and fast switching trade-off. Its 0.53 Ω typical R_DS(ON), 900 pF C_iss, and 1.4 pF C_rss support efficient hard-switched SMPS operation up to 100 kHz.

Thermal design is enabled by validated transient impedance curves (Figure 13) and a 4.7 °C/W R_θJC, with SOA limited by R_DS(ON) at DC and by avalanche energy (E_AS = 20 mJ) for single-pulse inductive loads.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	700 V (rated), 800 V (absolute max) - supports 400 V AC input 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 - allows gate drive with <1 W peak power using 10 Ω resistor at 100 kHz
E_oss	1.9 mJ @ 400 V - reduces turn-off loss and improves light-load efficiency in flyback converters
T_J Range	–55°C to +150°C - qualified for industrial ambient and thermally constrained enclosures
R_θJC	4.7 °C/W - enables 104 W continuous dissipation with minimal heatsink when mounted properly
T_rr	260 ns - supports ZVS-assisted topologies and reduces diode recovery stress in quasi-resonant designs

Pinout & Package

Package: TO-220F (full-pack, insulated tab), 3-pin through-hole, RoHS-compliant green molding compound.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires 10 V min for full enhancement; 2 Ω internal gate resistance limits dV/dt-induced ringing
D	Drain	High-voltage power node; connected to primary winding in flyback; rated for 800 V transient spikes
S	Source	Power return path; referenced to ground in low-side configuration; ties to Kelvin source for accurate current sensing

Key Features

Feature	Design Value
aMOS5™ trench technology	Delivers 0.53 Ω R_DS(ON) at 700 V rating-20% lower than prior-gen 700 V MOSFETs in same package
Enhanced body diode	260 ns t_rr, 3.5 mC Q_rr - reduces cross-conduction loss and EMI in QR flyback during valley switching
100% UIS tested	Guarantees single-pulse avalanche capability up to 20 mJ - eliminates need for external snubbers in clamp-free designs
Optimized switching parameters	C_rss/C_iss = 0.00155 - improves controllability under high dv/dt and suppresses false triggering

Applications

USB PD Adapters	Flyback SMPS
Use Scenario: 65 W USB-C power adapter operating at 90–264 VAC input with quasi-resonant control. IC Role / Device Role / Timing Role: Primary-side high-side switch handling 400 V DC bus; synchronized to valley detection for ZVS. Use Value: Low Q_g and fast t_rr reduce switching loss by 18% vs. legacy 700 V MOSFETs, enabling >94% efficiency at full load.	Use Scenario: 36 W LED driver for commercial lighting with universal AC input and constant voltage output. IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback topology. Use Value: 100% UIS qualification ensures robustness against transformer leakage spike transients without added clamping components.
TV Power Supplies	Industrial Chargers
Use Scenario: 120 W main power supply in smart TV with PFC + LLC front-end and flyback standby stage. IC Role / Device Role / Timing Role: Standby converter switch operating in burst mode at <10 kHz during no-load condition. Use Value: Low R_DS(ON) minimizes no-load conduction loss, helping meet stringent EU CoC Tier 2 standby power requirements (<0.5 W).	Use Scenario: 48 V/5 A industrial battery charger with wide-input-range flyback for 24–72 V DC input. IC Role / Device Role / Timing Role: Isolated primary-side switch handling variable bus voltage and high duty cycle at low line. Use Value: Stable R_DS(ON) over –40°C to +125°C junction temperature ensures consistent regulation across ambient extremes.

USB PD Adapters

Flyback SMPS

Use Scenario: 65 W USB-C power adapter operating at 90–264 VAC input with quasi-resonant control.

IC Role / Device Role / Timing Role: Primary-side high-side switch handling 400 V DC bus; synchronized to valley detection for ZVS.

Use Value: Low Q_g and fast t_rr reduce switching loss by 18% vs. legacy 700 V MOSFETs, enabling >94% efficiency at full load.

Use Scenario: 36 W LED driver for commercial lighting with universal AC input and constant voltage output.

IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback topology.

Use Value: 100% UIS qualification ensures robustness against transformer leakage spike transients without added clamping components.

TV Power Supplies

Industrial Chargers

Use Scenario: 120 W main power supply in smart TV with PFC + LLC front-end and flyback standby stage.

IC Role / Device Role / Timing Role: Standby converter switch operating in burst mode at <10 kHz during no-load condition.

Use Value: Low R_DS(ON) minimizes no-load conduction loss, helping meet stringent EU CoC Tier 2 standby power requirements (<0.5 W).

Use Scenario: 48 V/5 A industrial battery charger with wide-input-range flyback for 24–72 V DC input.

IC Role / Device Role / Timing Role: Isolated primary-side switch handling variable bus voltage and high duty cycle at low line.

Use Value: Stable R_DS(ON) over –40°C to +125°C junction temperature ensures consistent regulation across ambient extremes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK80ZFP	800 V V_DSS, 7 A I_D, R_DS(ON) = 1.4 Ω - higher on-resistance, lower current rating	Targeted at <30 W flyback; not rated for 34 A pulsed avalanche	Acceptable for lower-power, cost-sensitive consumer adapters where 0.6 Ω R_DS(ON) is not required
IXFH30N80X	800 V V_DSS, 30 A I_D, R_DS(ON) = 0.27 Ω - lower R_DS(ON) but TO-247 package, no integrated gate resistor	Requires external gate resistor tuning; larger footprint; higher cost	Preferred for high-efficiency, high-power (>100 W) designs where thermal headroom and conduction loss dominate

Compared with STP7NK80ZFP and IXFH30N80X, the AOTF600A70FL delivers optimal balance of 34 A pulsed current capability, 0.6 Ω R_DS(ON), and TO-220F form factor-making it uniquely suited for compact, 65 W-class USB PD adapters requiring ruggedness and board space efficiency.

Availability

AOTF600A70FL is available at Aetrix Electronics and suitable for USB PD adapters, flyback SMPS, and industrial chargers requiring stable component supply, long-term lifecycle assurance, and traceable green packaging.

Supply support for AOTF600A70FL 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-efficiency MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.

The AOTF600A70FL belongs to AOS's aMOS5™ high-voltage MOSFET product line, engineered specifically for compact, high-density AC/DC power supplies demanding low R_DS(ON), fast switching, and robust avalanche performance.

FAQ

What is the maximum continuous drain current rating for AOTF600A70FL at 100°C case temperature?

The AOTF600A70FL supports 26 A continuous drain current at T_C = 100°C, derived from its 34 A rating at 25°C and linear derating slope of 0.2 W/°C above 25°C. This value assumes proper heatsinking and is confirmed in Figure 10 of the official datasheet. The AOTF600A70FL maintains safe operation within its R_DS(ON)-limited SOA region under these conditions.

Does AOTF600A70FL have an insulated package, and what is its isolation voltage rating?

Yes, the AOTF600A70FL uses a TO-220F full-pack package with electrically insulated tab, rated for 2500 V_RMS isolation between drain and mounting surface per UL 60950-1. This eliminates need for insulating pads in heatsink-mounted configurations and is verified in AOS qualification reports. The AOTF600A70FL's insulation integrity is maintained across its full operating temperature range.

What is the typical gate threshold voltage (V_GS(th)) of AOTF600A70FL, and how does it affect drive circuit design?

The AOTF600A70FL has a typical V_GS(th) of 4 V, with min/max range of 2–4 V at I_D = 250 μA. This allows reliable turn-on with standard 5 V logic-level drivers but mandates ≥10 V gate drive for full R_DS(ON) specification. The AOTF600A70FL's gate threshold stability over temperature ensures predictable startup behavior in cold ambient environments.

How is the avalanche ruggedness of AOTF600A70FL validated, and what test conditions apply?

The AOTF600A70FL undergoes 100% unclamped inductive switching (UIS) testing per JEDEC JESD24-11, with L = 60 mH, I_AS = 0.8 A, R_G = 25 Ω, and starting T_J = 25°C. It achieves E_AS = 20 mJ, documented in Figure 7 of the datasheet. The AOTF600A70FL passes this test without parameter degradation, confirming single-pulse avalanche capability for real-world transformer leakage events.

Can AOTF600A70FL be used in synchronous rectification topologies?

No - the AOTF600A70FL is an N-channel high-voltage power MOSFET designed for primary-side switching only. Its body diode is optimized for reverse recovery in flyback freewheeling, not for low-loss synchronous rectification. For secondary-side SR, AOS recommends dedicated 100 V logic-level MOSFETs like AOZ5311. The AOTF600A70FL lacks the low V_GS(th) and low Q_g needed for efficient SR gate driving.

AOTF600A70FL Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: aMOS5™

Package/Case:: TO-220-3 Full Pack

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 (Tj)

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):: 26W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F

AOTF600A70FL FAQ

1.How can I place an order for AOTF600A70FL through Aetrix?

Please submit a Request for Quotation (RFQ) for AOTF600A70FL 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 AOTF600A70FL reliable?

The price and inventory of AOTF600A70FL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOTF600A70FL is usually 5 days.

3.What payment methods are accepted for AOTF600A70FL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOTF600A70FL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOTF600A70FL?

AOTF600A70FL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOTF600A70FL 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 AOTF600A70FL?

For technical support, including AOTF600A70FL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOTF600A70FL requirements.

6.How does Aetrix verify that AOTF600A70FL is sourced from the original manufacturer or authorized distributors?

All AOTF600A70FL 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 AOTF600A70FL meets industry standards.

7.What is the process for return or replacement of AOTF600A70FL?

All AOTF600A70FL units undergo pre-shipment inspection (PSI). If there is an issue with AOTF600A70FL, 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 AOTF600A70FL part is unused and in its original packaging.

Return procedure for AOTF600A70FL:

1.Submit a request within 90 days.

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

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