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

Alpha & Omega Semiconductor Inc. AOD450A70

Name: AOD450A70
Brand: Alpha & Omega Semiconductor Inc.
SKU: AOD450A70
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AOD450A70

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: AOD450A70.pdf

Description:: N

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Product details

Overview

AOD450A70 from Alpha & Omega Semiconductor is a 700 V, 44 A N-channel power MOSFET in TO-252 (DPAK) package, featuring 0.45 Ω max R_DS(ON), 20 nC typical gate charge, and 2.5 mJ E_OSS at 400 V - optimized for PFC and LLC resonant converter stages in server, gaming PSU, and industrial power supplies.

For engineers reviewing the AOD450A70 datasheet, pinout, applications, or equivalent options, key selection criteria include its 800 V BVDSS rating, 100% UIS-tested ruggedness, enhanced body diode with 275 ns t_rr, and thermal resistance of 1.0 °C/W junction-to-case - critical for high-reliability, high-voltage switching designs.

Technical Context

The AOD450A70 employs proprietary aMOS5™ technology to achieve low conduction loss and optimized switching parameters, including 5.2 nC Q_gd and 15 ns t_r, supporting improved EMI performance in hard-switched and resonant topologies. Its 6.7 Ω gate resistance and 1115 pF C_iss enable predictable drive requirements under 10 V gate bias.

Designed for unclamped inductive switching stress, the device delivers 30 mJ repetitive avalanche energy and 6.8 mJ single-pulse E_AS at T_J = 25°C. The body diode exhibits 1.2 V V_SD max and 3.5 mC Q_rr, enabling robust reverse recovery in continuous conduction mode operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	700 V - supports 400–480 V DC bus applications with margin for voltage transients
R_DS(ON), max	0.45 Ω - enables <1.0 W conduction loss at 2.3 A ID, reducing thermal load in compact layouts
Q_g, typ	20 nC - determines gate driver current requirement (~2 A peak for 10 ns rise time)
E_OSS @ 400 V	2.5 mJ - quantifies output capacitance energy loss during hard-switching transitions
t_rr	275 ns - defines minimum dead-time needed to prevent shoot-through in half-bridge configurations
T_J range	−55 to +150 °C - ensures operation across industrial ambient and high-power dissipation conditions
R_θJC	1.0 °C/W - allows direct heatsink mounting for >100 W continuous power handling with minimal thermal interface resistance

Pinout & Package

Package: TO-252 (DPAK), surface-mount, exposed drain pad for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires 10 V nominal drive for full enhancement; ±30 V absolute max rating
D	Drain	Main high-side switching node; electrically connected to exposed copper pad for thermal path and current return
S	Source	Reference node for gate drive and current sensing; tied to PCB ground plane in most PFC/LLC implementations

Key Features

Feature	Design Value
aMOS5™ process technology	Delivers 0.405 Ω typical R_DS(ON) at V_GS = 10 V, improving efficiency over prior-generation 700 V MOSFETs
100% UIS tested	Guarantees unclamped inductive switching capability up to 30 mJ repetitive, eliminating need for external snubbers in flyback/PFC
Enhanced body diode	275 ns t_rr and 21 A I_RM support ZVS/ZCS operation without external diode in LLC resonant converters
Optimized EMI profile	Low Crss (2 pF) and controlled dv/dt ruggedness (>100 V/ns) reduce radiated emissions in high-frequency SMPS

Applications

Server Power Supply PFC Stage	Gaming PSU LLC Resonant Converter
Use Scenario: Active PFC boost stage operating at 65–100 kHz with 400 V DC output and 1.5 kW power level. IC Role / Device Role / Timing Role: Main switching transistor in continuous conduction mode (CCM) boost topology, synchronized to controller PWM signal. Use Value: 0.45 Ω R_DS(ON) minimizes conduction loss at high RMS current; 100% UIS test ensures reliability during line surge events.	Use Scenario: Primary-side switch in asymmetric half-bridge LLC resonant converter powering GPU VRMs in high-end gaming PSUs. IC Role / Device Role / Timing Role: High-side switching element operating at 200–500 kHz with zero-voltage switching (ZVS) enabled by fast body diode recovery. Use Value: 275 ns t_rr and low Q_rr (3.5 mC) reduce turn-on loss and enable reliable ZVS across wide load range.
Industrial AC-DC Adapter	LED Driver Flyback Converter
Use Scenario: 300 W industrial adapter with universal input (90–264 VAC) and regulated 24 V/12.5 A output using active clamp flyback. IC Role / Device Role / Timing Role: Primary switch subjected to high dv/dt stress during clamp release and reset phases. Use Value: 100 V/ns dv/dt ruggedness and 800 V BVDSS provide margin against voltage spikes in poorly filtered mains environments.	Use Scenario: Isolated flyback LED driver for commercial lighting (48 V/1.5 A output) operating in discontinuous conduction mode (DCM). IC Role / Device Role / Timing Role: Main power switch cycling at 65 kHz with high peak current pulses and frequent startup/shutdown cycles. Use Value: 44 A I_DM and 11 A I_S continuous body diode current support high peak-to-average ratio without thermal derating.

Server Power Supply PFC Stage

Gaming PSU LLC Resonant Converter

Use Scenario: Active PFC boost stage operating at 65–100 kHz with 400 V DC output and 1.5 kW power level.

IC Role / Device Role / Timing Role: Main switching transistor in continuous conduction mode (CCM) boost topology, synchronized to controller PWM signal.

Use Value: 0.45 Ω R_DS(ON) minimizes conduction loss at high RMS current; 100% UIS test ensures reliability during line surge events.

Use Scenario: Primary-side switch in asymmetric half-bridge LLC resonant converter powering GPU VRMs in high-end gaming PSUs.

IC Role / Device Role / Timing Role: High-side switching element operating at 200–500 kHz with zero-voltage switching (ZVS) enabled by fast body diode recovery.

Use Value: 275 ns t_rr and low Q_rr (3.5 mC) reduce turn-on loss and enable reliable ZVS across wide load range.

Industrial AC-DC Adapter

LED Driver Flyback Converter

Use Scenario: 300 W industrial adapter with universal input (90–264 VAC) and regulated 24 V/12.5 A output using active clamp flyback.

IC Role / Device Role / Timing Role: Primary switch subjected to high dv/dt stress during clamp release and reset phases.

Use Value: 100 V/ns dv/dt ruggedness and 800 V BVDSS provide margin against voltage spikes in poorly filtered mains environments.

Use Scenario: Isolated flyback LED driver for commercial lighting (48 V/1.5 A output) operating in discontinuous conduction mode (DCM).

IC Role / Device Role / Timing Role: Main power switch cycling at 65 kHz with high peak current pulses and frequent startup/shutdown cycles.

Use Value: 44 A I_DM and 11 A I_S continuous body diode current support high peak-to-average ratio without thermal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP7NK80ZFP	800 V BVDSS, 0.85 Ω R_DS(ON), TO-220FP package, no UIS rating specified	Larger footprint, higher conduction loss, lacks 100% UIS validation	Acceptable where board space permits and transient stress is low; not recommended for high-reliability PFC
IXTH30N60L2	600 V BVDSS, 0.18 Ω R_DS(ON), TO-247 package, 250 nC Q_g	Lower voltage rating limits use to ≤380 V DC bus; higher gate charge increases driver complexity	Only suitable for lower-input-voltage industrial supplies; requires redesign for 400 V+ systems

Compared with STP7NK80ZFP and IXTH30N60L2, the AOD450A70 uniquely balances 700 V rating, low R_DS(ON), and validated UIS robustness in a thermally efficient DPAK package - making it optimal for space-constrained, high-efficiency server and gaming PSU designs requiring field-proven ruggedness.

Availability

AOD450A70 is available at Aetrix Electronics and suitable for server power supplies, gaming PSUs, and industrial AC-DC adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for AOD450A70 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 AOD450A70 belongs to AOS' aMOS5™ high-voltage MOSFET product line, engineered specifically for efficiency-critical, high-reliability switching applications in modern switched-mode power supplies.

FAQ

What is the maximum continuous drain current rating for AOD450A70 at TC = 25°C?

The AOD450A70 has a maximum continuous drain current (I_D) rating of 20 A at case temperature T_C = 25°C, derating linearly to 0 A at T_C = 150°C per Figure 12. This rating assumes proper heatsinking and accounts for thermal resistance R_θJC = 1.0 °C/W. The AOD450A70 must be mounted on a thermally adequate PCB or heatsink to sustain this current continuously.

Does AOD450A70 support gate drive voltages above 10 V?

Yes - the AOD450A70 specifies ±20 V DC gate-source voltage (V_GS) and ±30 V dynamic (AC) gate-source voltage, allowing robust 12–15 V gate drive for lower R_DS(ON) and faster switching. However, gate oxide integrity is guaranteed only within the ±20 V DC limit; exceeding this risks long-term reliability degradation. The AOD450A70 achieves 0.405 Ω typical R_DS(ON) at V_GS = 10 V, making 12 V drive a common design choice.

Is AOD450A70 suitable for zero-voltage switching (ZVS) topologies like LLC resonant converters?

Yes - the AOD450A70 is explicitly designed for ZVS applications, with a fast body diode (t_rr = 275 ns, Q_rr = 3.5 mC) and low Crss (2 pF) enabling reliable resonant turn-on. Its 100% UIS testing and 30 mJ repetitive avalanche energy ensure robustness during transient ZVS failure modes. In LLC designs, the AOD450A70's combination of low Q_g (20 nC) and low Q_gd (5.2 nC) also improves control loop responsiveness.

What is the thermal resistance from junction to ambient (RθJA) for AOD450A70 in standard layout?

The AOD450A70 has R_θJA = 55 °C/W when mounted on a 1 in² FR-4 board with 2 oz. copper, measured in still air at T_A = 25°C. This value assumes no external heatsink and reflects worst-case natural convection cooling. For production designs, R_θJA is typically reduced via thermal vias to inner layers and copper pour; the AOD450A70's R_θJC = 1.0 °C/W enables far superior thermal performance when heatsink-mounted.

How does the 100% Rg tested specification impact AOD450A70 reliability in production?

The "100% Rg tested" specification means every AOD450A70 unit undergoes production screening for gate resistance (R_g = 6.7 Ω typical), ensuring consistent switching behavior and EMI performance across the lot. This eliminates outliers that could cause timing skew, overshoot, or non-uniform dv/dt in parallel configurations. For high-volume server PSU manufacturers, this test directly supports automated optical inspection (AOI) and functional test repeatability - enhancing yield and field reliability of the AOD450A70.

AOD450A70 Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: aMOS5™

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 700 V

Current - Continuous Drain (Id) @ 25°C:: 11A (Tc)

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

Rds On (Max) @ Id, Vgs:: 450mOhm @ 2.3A, 10V

Vgs(th) (Max) @ Id:: 3.6V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1115 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 125W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

AOD450A70 FAQ

1.How can I place an order for AOD450A70 through Aetrix?

Please submit a Request for Quotation (RFQ) for AOD450A70 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 AOD450A70 reliable?

The price and inventory of AOD450A70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOD450A70 is usually 5 days.

3.What payment methods are accepted for AOD450A70?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOD450A70 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AOD450A70?

AOD450A70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AOD450A70 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 AOD450A70?

For technical support, including AOD450A70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOD450A70 requirements.

6.How does Aetrix verify that AOD450A70 is sourced from the original manufacturer or authorized distributors?

All AOD450A70 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 AOD450A70 meets industry standards.

7.What is the process for return or replacement of AOD450A70?

All AOD450A70 units undergo pre-shipment inspection (PSI). If there is an issue with AOD450A70, 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 AOD450A70 part is unused and in its original packaging.

Return procedure for AOD450A70:

1.Submit a request within 90 days.

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

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