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Alpha & Omega Semiconductor Inc. AOK8N80
- Part No.:
- AOK8N80
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-247-3
- Datasheet:
-
AOK8N80.pdf
- Description:
- MOSFET N-CH 800V 7.4A TO247
- Quantity:
- Payment:
- Shipping:
Inventory:5,012
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Product details
Overview
AOK8N80 from Alpha & Omega Semiconductor is an 800 V, 7.4 A N-channel high-voltage power MOSFET in TO-247 package, featuring RDS(on) < 1.63 Ω at VGS = 10 V, 100% UIS tested, and guaranteed avalanche capability-designed for offline AC-DC power supplies including LED drivers and auxiliary power rails.
For engineers reviewing the AOK8N80 datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage (800 V), continuous current rating (7.4 A @ TC = 25°C), gate threshold (3.3–4.5 V), total gate charge (20–32 nC), and thermal resistance (RθJC = 0.51 °C/W).
Technical Context
The AOK8N80 employs a high-voltage trench-gate MOSFET process optimized for robust unclamped inductive switching (UIS) performance and low dynamic losses. Its Ciss (1100–1650 pF), Crss (6–16 pF), and Qg (20–32 nC) support efficient hard-switching in flyback and LLC resonant converters up to 100 kHz.
It delivers avalanche-rated operation (EAS = 433 mJ, IAR = 3.8 A) with tight VGS(th) distribution (3.3–4.5 V) and body diode recovery time trr = 380–585 ns at IF = 8 A, enabling reliable operation in discontinuous conduction mode (DCM) topologies without external snubbing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 800 V - supports 400 VAC input designs with ≥2× safety margin against line transients |
| ID (TC = 25°C) | 7.4 A - defines maximum continuous conduction capability with heatsink at ambient temperature |
| RDS(on) (VGS = 10 V) | < 1.63 Ω - determines conduction loss in primary-side switch; typical 1.35 Ω reduces Pcond by ~20% vs. max |
| Qg | 20–32 nC - sets gate drive power requirement and switching speed trade-off in PWM controllers |
| EAS | 433 mJ - enables single-pulse energy handling during overcurrent events without failure |
| RθJC | 0.51 °C/W - allows direct thermal path to heatsink; enables 300 W dissipation at ΔT = 150°C junction-to-case |
| trr | 380–585 ns - limits reverse recovery loss and EMI generation in DCM flyback secondary-side rectification |
Pinout & Package
Package: TO-247 (3-lead, isolated tab). Standard through-hole mounting with drain-connected metal tab for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Drain) | Main high-side current path | Connected to transformer primary or DC bus; electrically tied to metal tab for low-inductance heat sinking |
| G (Gate) | Control terminal | Receives PWM signal; requires 10 V drive for full enhancement; Rg = 1.7–5.3 Ω affects switching speed and ringing |
| S (Source) | Reference node for gate drive | Return path for load current; used as local ground reference for gate driver ICs and current sensing |
Key Features
| Feature | Design Value |
|---|---|
| 100% UIS tested | Guarantees single-pulse avalanche survival under worst-case inductive turn-off stress without derating |
| Low Crss (6–16 pF) | Reduces Miller-induced shoot-through risk and improves dv/dt immunity in high-side configurations |
| Guaranteed VGS(th) range (3.3–4.5 V) | Enables reliable turn-on with standard 5 V or 10 V gate drivers; avoids partial enhancement in brown-out conditions |
| Halogen-free option (AOK8N80L) | Meets IEC 61249-2-21 and RoHS compliance requirements for environmentally sensitive applications |
Applications
| LED Driver Power Stage | Industrial Auxiliary Supply |
|---|---|
Use Scenario: Constant-current LED driver operating from 230 VAC mains with flyback topology. IC Role / Device Role / Timing Role: Primary-side switching element controlling energy transfer to secondary winding. Use Value: 800 V rating accommodates peak line voltage (≈325 V) plus surge margin; low RDS(on) minimizes conduction loss at 7.4 A average current. | Use Scenario: Isolated 24 V/1 A auxiliary supply powering control logic in PLC modules. IC Role / Device Role / Timing Role: Main power switch in quasi-resonant flyback converter. Use Value: Guaranteed avalanche capability ensures reliability during output short-circuit events without external clamping. |
| AC-DC Adapter Primary Switch | Smart Meter Power Conversion |
Use Scenario: 36 W universal-input adapter for consumer electronics. IC Role / Device Role / Timing Role: High-side switch in DCM flyback with integrated controller. Use Value: Low Qg (20–32 nC) and fast tr/tf (51/41 ns) enable high-frequency operation (>65 kHz) while maintaining efficiency. | Use Scenario: Mains-powered smart electricity meter requiring long-term reliability and surge immunity. IC Role / Device Role / Timing Role: Input-stage switch in isolated DC-DC converter powering metrology ICs. Use Value: 150°C max junction temperature and -55°C to +150°C storage range support extended outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP8NK80ZFP | 800 V, 8 A, RDS(on) = 1.5 Ω (typ), TO-220FP package, no UIS rating specified | Limited to lower-power adapters due to higher thermal resistance (RθJA ≈ 62.5 °C/W) | Prefer AOK8N80 where avalanche ruggedness and TO-247 thermal performance are required |
| IPP80N08S2L-07 | 80 V, 80 A, RDS(on) = 7.2 mΩ - incompatible voltage rating; not a functional substitute | Designed for low-voltage automotive motor drives, not AC-DC conversion | Not suitable for AOK8N80 replacement; voltage mismatch invalidates substitution |
Compared with STP8NK80ZFP, the AOK8N80 offers superior avalanche ruggedness and lower thermal resistance via TO-247 packaging, making it better suited for industrial-grade offline supplies. The IPP80N08S2L-07 is not a viable alternative due to its 80 V rating-far below the 800 V requirement of AOK8N80 applications.
Availability
AOK8N80 is available at Aetrix Electronics and suitable for LED driver power stages, industrial auxiliary supplies, and AC-DC adapter primary switches requiring stable component supply and long-lifecycle support.
Supply support for AOK8N80 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 power conversion and management.
The AOK8N80 belongs to AOS's high-voltage super-junction MOSFET product line, engineered specifically for rugged, high-reliability offline AC-DC power supplies in consumer and industrial markets.
FAQ
What is the maximum drain-source voltage rating for the AOK8N80?
The AOK8N80 has a maximum drain-source voltage (VDS) rating of 800 V at TJ = 25°C, with a temperature coefficient of 0.86 V/°C. This rating is validated across the full operating junction temperature range (−55°C to +150°C) and supports designs targeting 400 VAC input with sufficient margin for transient surges. The AOK8N80 maintains safe operation up to 900 V at TJ = 150°C per absolute maximum ratings.
Does the AOK8N80 have avalanche capability, and is it tested?
Yes, the AOK8N80 is 100% unclamped inductive switching (UIS) tested per JEDEC JESD24-1. It guarantees single-pulse avalanche energy (EAS) of 433 mJ at TJ = 25°C and repetitive avalanche current (IAR) of 3.8 A. These ratings are measured using standardized test circuits with L = 60 mH, VDD = 150 V, and RG = 25 Ω, ensuring ruggedness in real-world overcurrent fault conditions.
What is the gate threshold voltage range for the AOK8N80?
The AOK8N80 has a gate threshold voltage (VGS(th)) range of 3.3 V to 4.5 V at ID = 250 µA and TJ = 25°C. This tightly controlled range ensures consistent turn-on behavior across temperature and unit variation, supporting reliable operation with standard 5 V or 10 V gate drivers without risk of partial enhancement or shoot-through.
What package type does the AOK8N80 use, and how is thermal management handled?
The AOK8N80 uses the TO-247 package with three leads (G, D, S) and an isolated metal tab electrically connected to the drain. Thermal management relies on direct mounting of the tab to a heatsink, achieving RθJC = 0.51 °C/W. This low junction-to-case resistance enables high-power dissipation-up to 300 W-with proper heatsinking, making it suitable for high-density offline power designs.
Is there a halogen-free version of the AOK8N80 available?
Yes, the halogen-free version is designated AOK8N80L. It meets IEC 61249-2-21 and RoHS Directive 2011/65/EU requirements, with identical electrical and thermal specifications to the standard AOK8N80. The "L" suffix indicates lead-free and halogen-free construction, and both variants share the same TO-247 package and pinout.
AOK8N80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 800 V
- Current - Continuous Drain (Id) @ 25°C:
- 7.4A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 1.63Ohm @ 4A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 32 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1650 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 245W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247
AOK8N80 FAQ
1.How can I place an order for AOK8N80 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOK8N80 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 AOK8N80 reliable?
The price and inventory of AOK8N80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOK8N80 is usually 5 days.
3.What payment methods are accepted for AOK8N80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOK8N80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOK8N80?
AOK8N80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOK8N80 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 AOK8N80?
For technical support, including AOK8N80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOK8N80 requirements.
6.How does Aetrix verify that AOK8N80 is sourced from the original manufacturer or authorized distributors?
All AOK8N80 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 AOK8N80 meets industry standards.
7.What is the process for return or replacement of AOK8N80?
All AOK8N80 units undergo pre-shipment inspection (PSI). If there is an issue with AOK8N80, 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 AOK8N80 part is unused and in its original packaging.
Return procedure for AOK8N80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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