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Alpha & Omega Semiconductor Inc. AOI4184
- Part No.:
- AOI4184
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-251-3 Stub Leads, IPAK
- Datasheet:
-
AOI4184.pdf
- Description:
- MOSFET N-CH 40V 12A/50A TO251A
- Quantity:
- Payment:
- Shipping:
Inventory:9,289
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Product details
Overview
AOI4184 from Alpha & Omega Semiconductor is a 40V N-channel enhancement-mode MOSFET in DPAK (TO-252) package, featuring RDS(ON) < 8 mΩ at VGS = 10 V and < 11 mΩ at VGS = 4.5 V, 50 A continuous drain current at TC = 25°C, and 100% UIS-tested ruggedness. It serves as a high-efficiency synchronous rectifier or main switch in DC-DC converters and motor drive half-bridges.
For engineers reviewing the AOI4184 datasheet, pinout, applications, or equivalent options, key selection criteria include its low gate charge (Qg = 27.2 nC typ), robust avalanche rating (EAS = 120 mJ), thermal resistance (RθJC = 2.4 °C/W), and compatibility with 4.5 V logic-level gate drive in space-constrained power stages.
Technical Context
The AOI4184 employs advanced trench-gate process technology to achieve low on-resistance while maintaining fast switching performance. Its gate threshold voltage (1.7–2.6 V) enables reliable turn-on with standard logic-level drivers, and its body diode exhibits trr = 29 ns (typ) and Qrr = 26 nC (typ) under IF = 20 A, dI/dt = 100 A/μs conditions.
Thermally, the device is optimized for surface-mount PCB mounting with low junction-to-case resistance (2.4 °C/W) and supports pulsed drain currents up to 120 A. It is rated for operation from –55°C to +175°C junction temperature and undergoes 100% Rg and UIS testing per production lot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum blocking voltage compatible with 24 V and 36 V nominal bus systems. |
| ID (TC = 25°C) | 50 A - Continuous conduction capability without heatsink at moderate case temperatures. |
| RDS(ON) (VGS = 10 V) | < 8 mΩ - Enables <1 W conduction loss at 25 A, critical for high-current buck converter switches. |
| Qg (10 V) | 27.2 nC typ - Reduces gate drive power and switching transition time in high-frequency PWM designs. |
| EAS | 120 mJ - Confirmed unclamped inductive switching energy handling, supporting robust motor control transients. |
| tr/tf | 17.2 / 16.8 ns - Fast edge rates support >500 kHz switching in isolated DC-DC and Class-D amplifiers. |
| RθJC | 2.4 °C/W - Allows direct thermal coupling to copper pour or heatsink for sustained 30+ W power dissipation. |
Pinout & Package
The AOI4184 is housed in a DPAK (TO-252) surface-mount package with exposed drain pad for thermal and electrical connection. The package features gull-wing leads and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G | Gate | Control terminal; accepts 0–10 V logic-level signals; requires ≤5 Ω series gate resistor for optimal switching. |
| D | Drain | Main high-side or low-side current path; electrically and thermally connected to exposed pad; ties to input bus or phase node. |
| S | Source | Reference node for gate drive and current sensing; connects to ground or low-side switch source in half-bridge topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced trench MOSFET process | Delivers <8 mΩ RDS(ON) at 10 V while maintaining high cell density and low gate charge. |
| 100% UIS tested | Guarantees minimum 120 mJ avalanche energy handling per unit-no screening failures in production lots. |
| Low RθJC (2.4 °C/W) | Enables direct thermal interface to PCB copper or external heatsink, supporting >40 W steady-state dissipation. |
| Logic-level gate drive (VGS(th) = 1.7–2.6 V) | Ensures full enhancement with 3.3 V or 5 V microcontroller outputs without level-shifting circuitry. |
| Fast body diode recovery (trr = 29 ns) | Reduces shoot-through risk and reverse recovery losses in synchronous rectification and H-bridge freewheeling. |
Applications
| DC-DC Buck Converter | BLDC Motor Phase Switch |
|---|---|
|
Use Scenario: High-efficiency 12–36 V input to 3.3/5/12 V output conversion in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Primary high-side switching element operating at 300–600 kHz with synchronous rectification. Use Value: Sub-8 mΩ RDS(ON) minimizes conduction loss at 20–40 A load; low Qg reduces gate drive loss and EMI. |
Use Scenario: 3-phase inverter stage driving 200–500 W brushless DC motors in HVAC blowers and power tools. IC Role / Device Role / Timing Role: Low-side switch in 6-step commutation with active freewheeling via integrated body diode. Use Value: 29 ns trr and 26 nC Qrr suppress voltage spikes during commutation; 120 A pulsed rating handles startup surges. |
| Hot-Swap Controller FET | LED Driver High-Side Switch |
|
Use Scenario: Inrush current limiting and fault protection in 48 V telecom power distribution units. IC Role / Device Role / Timing Role: Series pass element controlled by dedicated hot-swap IC with current-sense feedback. Use Value: 40 V VDS margin accommodates line transients; 100% UIS test ensures survivability during short-circuit events. |
Use Scenario: Constant-current dimming of high-brightness LED strings in architectural lighting fixtures. IC Role / Device Role / Timing Role: High-side PWM switch modulating current through external sense resistor and inductor. Use Value: Logic-level gate enables direct drive from 3.3 V MCU timers; low RDS(ON) maintains >95% efficiency at 3 A LED current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRF7470PBF | RDS(ON) = 9.5 mΩ @ 10 V; Qg = 32 nC; TO-252 package; higher gate charge increases drive loss. | Same 40 V rating but slower switching; less suitable for >300 kHz SMPS due to higher Ciss and Qg. | Prefer AOI4184 where gate drive strength is limited or switching frequency exceeds 400 kHz. |
| DMN3020LSD-13 | RDS(ON) = 12.5 mΩ @ 4.5 V; SO-8 package; lower current rating (12 A); no UIS rating specified. | Compact dual-MOSFET footprint; unsuitable for >15 A continuous loads or avalanche-prone environments. | Select AOI4184 for single-device 30+ A applications requiring ruggedness and thermal headroom. |
Compared with IRF7470PBF and DMN3020LSD-13, the AOI4184 delivers superior conduction efficiency at high current, lower gate drive demand, and verified avalanche robustness-making it the preferred choice for industrial power stages demanding reliability and thermal headroom.
Availability
AOI4184 is available at Aetrix Electronics and suitable for DC-DC converters, BLDC motor drives, hot-swap controllers, and LED driver circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AOI4184 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 automotive markets.
The AOI4184 belongs to AOS's advanced trench MOSFET product line, engineered specifically for high-current, high-efficiency power conversion in space-constrained industrial and embedded systems.
FAQ
What is the maximum continuous drain current for AOI4184 at 100°C case temperature?
The AOI4184 supports 40 A continuous drain current at TC = 100°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits of the DPAK package and ensures safe operation without exceeding the 175°C maximum junction temperature. Designers must verify PCB copper area and airflow to sustain this current in real-world conditions. The AOI4184 datasheet confirms this value under steady-state conditions with proper thermal management.
Does AOI4184 have a specified avalanche energy rating?
Yes, the AOI4184 is 100% unclamped inductive switching (UIS) tested with a minimum single-pulse avalanche energy rating of 120 mJ. This value is measured under standardized conditions (L = 0.1 mH, IAS = 9.5 A) and guarantees ruggedness against inductive transients in motor drives and relay snubbing. The AOI4184 specification sheet explicitly lists EAS and confirms lot-level testing compliance.
Can AOI4184 be driven directly by a 3.3 V microcontroller GPIO?
Yes, the AOI4184 has a gate threshold voltage range of 1.7–2.6 V and achieves full enhancement at VGS = 4.5 V, making it compatible with 3.3 V logic-level drive. However, RDS(ON) rises to <11 mΩ at 4.5 V, so conduction loss increases ~38% versus 10 V drive. For optimal efficiency, use a dedicated gate driver or ensure sufficient gate current capability. The AOI4184 electrical characteristics confirm usable on-state performance down to 4.5 V.
What is the thermal resistance from junction to ambient (RθJA) for AOI4184 on a standard PCB?
The AOI4184 exhibits RθJA = 55 °C/W when mounted on a 1 in² FR-4 board with 2 oz. copper in still air, per JEDEC JESD51-7. This value assumes no additional heatsinking and defines worst-case thermal performance. With enhanced copper pours or forced airflow, actual RθJA improves significantly. The AOI4184 datasheet specifies this condition explicitly in its Thermal Characteristics table.
Is AOI4184 pin-compatible with AOD4184?
Yes, AOI4184 and AOD4184 share identical DPAK (TO-252) package dimensions, pinout (G-D-S), and absolute maximum ratings. Both devices are manufactured by Alpha & Omega Semiconductor and intended as functionally equivalent variants-AOI4184 denotes tape-and-reel packaging for automated assembly, while AOD4184 may denote different reel orientation or internal lot coding. The AOI4184 datasheet explicitly groups them under the same part family and parameter tables.
AOI4184 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- TO-251-3 Stub Leads, IPAK
- Packaging:
- Tube
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 12A (Ta), 50A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 8mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.6V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 33 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1800 pF @ 20 V
- FET Feature:
- -
- Power Dissipation (Max):
- 2.3W (Ta), 50W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-251A
AOI4184 FAQ
1.How can I place an order for AOI4184 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOI4184 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 AOI4184 reliable?
The price and inventory of AOI4184 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOI4184 is usually 5 days.
3.What payment methods are accepted for AOI4184?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOI4184 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOI4184?
AOI4184 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOI4184 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 AOI4184?
For technical support, including AOI4184 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOI4184 requirements.
6.How does Aetrix verify that AOI4184 is sourced from the original manufacturer or authorized distributors?
All AOI4184 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 AOI4184 meets industry standards.
7.What is the process for return or replacement of AOI4184?
All AOI4184 units undergo pre-shipment inspection (PSI). If there is an issue with AOI4184, 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 AOI4184 part is unused and in its original packaging.
Return procedure for AOI4184:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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