My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AO4294A
- Part No.:
- AO4294A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4294A.pdf
- Description:
- N
- Quantity:
- Payment:
- Shipping:
Inventory:7,902
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AO4294A from Alpha & Omega Semiconductor is a 100V, 11.5A N-channel Trench Power AlphaSGT™ MOSFET in SO-8 package, featuring <12mΩ RDS(ON) at VGS=10V and logic-level gate drive compatibility. It delivers high-frequency switching performance with 32.5nC total gate charge and is 100% UIS tested for ruggedness in power conversion stages.
For engineers reviewing the AO4294A datasheet, pinout, applications, or equivalent options, key selection criteria include its 100V breakdown voltage, low gate charge × RDS(ON) figure-of-merit, SO-8 thermal resistance (RθJA = 75°C/W), body-diode reverse recovery time of 26.5ns, and suitability for synchronous rectification in DC-DC converters.
Technical Context
This MOSFET employs AlphaSGT™ trench technology to achieve low conduction loss and fast switching. Its gate threshold voltage (1.5–2.5V) enables direct interfacing with 3.3V/5V logic controllers, while the 0.5Ω typical gate resistance supports controlled turn-on/turn-off transitions without external gate resistors in many designs.
The device integrates a robust body diode with 135nC reverse recovery charge and 26.5ns recovery time, validated under 500A/μs di/dt conditions. Thermal design leverages SO-8's 16°C/W junction-to-lead resistance, enabling 2.0W continuous power dissipation at TA=70°C with standard PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 100V - Supports input rails up to 48V nominal systems with 2× safety margin for transients. |
| ID (VGS=10V) | 11.5A - Sustains continuous load current in 25W–30W buck converter output stages. |
| RDS(ON) (VGS=10V) | <12mΩ - Limits conduction loss to <1.6W at 11.5A, critical for thermally constrained SO-8 layouts. |
| Qg(10V) | 32.5–50nC - Determines gate driver power requirement; compatible with common 1A peak drivers. |
| tr/tf | 3ns/4ns - Enables >1MHz switching in hard-switched topologies with minimal overlap loss. |
| EAS | 31mJ - Withstands unclamped inductive energy in motor gate-drive or hot-swap applications. |
| VGS(th) | 1.5–2.5V - Ensures reliable turn-on with 3.3V microcontroller GPIO without level-shifting. |
Pinout & Package
AO4294A is housed in a standard SO-8 surface-mount package with exposed drain pad for thermal enhancement. Pin 1–4 are source terminals (S), pins 5–8 are drain terminals (D), and pin 3 is gate (G). The dual-source/dual-drain configuration reduces package inductance and improves current sharing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Pin 3) | Gate control input | Accepts logic-level signals; 0.5Ω internal gate resistance damps ringing without external resistor. |
| S (Pins 1,2,4,7) | Source return path | Four parallel source pins minimize source inductance and improve switching stability. |
| D (Pins 5,6,8) | Drain power terminal | Three drain pins + exposed pad handle high pulsed currents; thermal path optimized to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Trench Power AlphaSGT™ technology | Enables sub-12mΩ RDS(ON) at 100V while maintaining high dv/dt immunity and avalanche ruggedness. |
| Logic-level gate drive | Turns on fully at VGS ≥ 4.5V, eliminating need for gate drivers in 3.3V/5V MCU-controlled SMPS. |
| 100% UIS tested | Each unit passes unclamped inductive switching stress test to 31mJ, ensuring field reliability in flyback or motor phases. |
| Low Qg × RDS(ON) FOM | 32.5nC × 12mΩ = 390nΩ·nC - benchmark efficiency metric for high-frequency synchronous rectifiers. |
| RoHS & Halogen-Free | Complies with IPC-1752A material declarations and JEDEC MSL-1 handling requirements for automated assembly. |
Applications
| Server VRM Output Stage | Industrial DC-DC Converter |
|---|---|
Use Scenario: High-current, high-efficiency 12V→1V point-of-load regulation in AI accelerator cards. IC Role / Device Role / Timing Role: Synchronous rectifier in multiphase buck converter, operating at 500kHz–1MHz with interleaved gate timing. Use Value: Sub-12mΩ RDS(ON) minimizes conduction loss at 11.5A per phase; 3ns rise time ensures precise dead-time control. | Use Scenario: 48V input isolated DC-DC module for PLC I/O power supplies. IC Role / Device Role / Timing Role: Primary-side switch in active-clamp forward topology, driven by isolated gate driver. Use Value: 100V rating accommodates reflected 40V spikes; 31mJ EAS withstands transformer leakage energy without snubbers. |
| Automotive Body Control Module | USB-C PD Power Delivery |
Use Scenario: Load switching for LED headlamp drivers and window lift motors in 12V/24V systems. IC Role / Device Role / Timing Role: High-side or low-side power switch controlled by CAN/LIN microcontroller GPIO. Use Value: Logic-level VGS(th) allows direct MCU drive; 150°C max junction temperature supports under-hood placement. | Use Scenario: Synchronous rectifier in 100W USB-C PD 3.1 fixed/flexible voltage output stage. IC Role / Device Role / Timing Role: Secondary-side switch replacing Schottky diodes in forward or LLC resonant converter. Use Value: 26.5ns trr and 135nC Qrr reduce body-diode conduction loss during zero-voltage switching transitions. |
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 | Higher RDS(ON) (14.5mΩ @ 10V), higher Qg (55nC), TO-252 package | Larger footprint, lower power density; requires heatsink above 5A continuous | Choose when SO-8 thermal limits are exceeded and board space permits DPAK mounting. |
| SiR872DP-T1-GE3 | Lower VDS (80V), lower RDS(ON) (7.5mΩ), same SO-8, 100% UIS rated | Not suitable for 48V+ input systems due to 80V rating; better for 24V industrial rails | Prefer for 24V applications where lower conduction loss outweighs voltage margin needs. |
Compared with IRF7470PBF and SiR872DP-T1-GE3, AO4294A uniquely balances 100V capability, SO-8 form factor, and logic-level drive-making it optimal for compact, high-input-voltage DC-DC converters where thermal management and gate drive simplicity are prioritized.
Availability
AO4294A is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for AO4294A 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, industrial, and automotive markets.
The AO4294A belongs to AOS' AlphaSGT™ trench MOSFET product line, engineered for high-frequency, high-efficiency power conversion where low gate charge and rugged avalanche performance are essential.
FAQ
What is the maximum continuous drain current for AO4294A at 70°C ambient temperature?
The AO4294A supports 9.0A continuous drain current at TA = 70°C, derated from its 11.5A rating at 25°C due to thermal limitations of the SO-8 package. This value assumes standard 1in² FR-4 PCB with 2oz copper and still air convection, per datasheet Figure 9 Safe Operating Area curve.
Does AO4294A require an external gate resistor for typical 500kHz switching?
AO4294A does not require an external gate resistor in most 500kHz applications due to its 0.5Ω typical internal gate resistance, which sufficiently damps ringing. However, a 1–5Ω series resistor is recommended when driving from low-impedance sources or in layouts with long gate traces to prevent oscillation.
Is AO4294A suitable for use as a high-side switch with bootstrap gate drive?
Yes, AO4294A is suitable for high-side bootstrap operation. Its 20V maximum gate-source voltage and 1.5–2.5V threshold enable reliable turn-on with standard 12V bootstrap supplies. The 32.5nC total gate charge ensures efficient charging within typical bootstrap capacitor time constants.
What is the body diode forward voltage of AO4294A at 11.5A?
The body diode forward voltage of AO4294A is 0.7–1.0V at IS = 11.5A and TJ = 25°C, per datasheet electrical characteristics table. This low VSD reduces conduction loss during dead-time conduction in synchronous rectifier applications.
How is avalanche ruggedness verified for AO4294A?
AO4294A undergoes 100% unclamped inductive switching (UIS) testing per JEDEC JESD22-A116, with each unit stressed to 31mJ at TJ = 25°C using L = 0.1mH. This qualifies the device for inductive load switching in motor drives and relay drivers without external protection.
AO4294A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- AlphaSGT™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 100 V
- Current - Continuous Drain (Id) @ 25°C:
- 11.5A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 12mOhm @ 11.5A, 10V
- Vgs(th) (Max) @ Id:
- 2.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 50 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2305 pF @ 50 V
- FET Feature:
- -
- Power Dissipation (Max):
- 3.1W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AO4294A FAQ
1.How can I place an order for AO4294A through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4294A 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 AO4294A reliable?
The price and inventory of AO4294A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4294A is usually 5 days.
3.What payment methods are accepted for AO4294A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4294A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4294A?
AO4294A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4294A 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 AO4294A?
For technical support, including AO4294A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4294A requirements.
6.How does Aetrix verify that AO4294A is sourced from the original manufacturer or authorized distributors?
All AO4294A 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 AO4294A meets industry standards.
7.What is the process for return or replacement of AO4294A?
All AO4294A units undergo pre-shipment inspection (PSI). If there is an issue with AO4294A, 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 AO4294A part is unused and in its original packaging.
Return procedure for AO4294A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AO4294A Tags
-
BSZ180P03NS3EGATMA1
Infineon Technologies
-
SIRA14DP-T1-GE3
Vishay Siliconix
-
AO4419
Alpha & Omega Semiconductor Inc.
-
SISA14BDN-T1-GE3
Vishay Siliconix
-
PSMN9R5-30YLC,115
Nexperia USA Inc.
-
BUK9Y21-40E,115
Nexperia USA Inc.
-
RTQ035N03HZGTR
Rohm Semiconductor
-
FDMS7680
onsemi
-
RQ3E180BNTB
Rohm Semiconductor
-
STL6N2VH5
STMicroelectronics
-
DMPH4029LFGQ-7
Diodes Incorporated
-
DMT6015LSS-13
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
