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HomeProductsDiscrete Semiconductor ProductsTransistors - FETs, MOSFETs - SingleAON7548
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AON7548 - Alpha & Omega Semiconductor Inc.

Manufacturer Part Number
AON7548
Manufacturer
Alpha and Omega Semiconductor, Inc.
Allelco Part Number
32D-AON7548
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
4,760 pcs available, New & Original
Parts Description
MOSFET N-CH 30V 24A 8DFN
Package
8-DFN-EP (3x3)
Data sheet
AON7548.pdf

Datasheets

AON7548.pdf

PCN Obsolescence/ EOL

EOL 12/Jul/2016.pdf
RoHs Status
 
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In stock: 4760

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Specifications

AON7548 Tech Specifications
Alpha & Omega Semiconductor Inc. - AON7548 technical specifications, attributes, parameters and parts with similar specifications to Alpha & Omega Semiconductor Inc. - AON7548

Product Attribute Attribute Value
Manufacturer Alpha and Omega Semiconductor, Inc.
Vgs(th) (Max) @ Id 2.5V @ 250µA
Vgs (Max) ±20V
Technology MOSFET (Metal Oxide)
Supplier Device Package 8-DFN-EP (3x3)
Series AlphaMOS
Rds On (Max) @ Id, Vgs 8.8mOhm @ 20A, 10V
Power Dissipation (Max) 3.1W (Ta), 23W (Tc)
Package / Case 8-PowerVDFN
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -55°C ~ 150°C (TJ)
Mounting Type Surface Mount
Input Capacitance (Ciss) (Max) @ Vds 1086 pF @ 15 V
Gate Charge (Qg) (Max) @ Vgs 22 nC @ 10 V
FET Type N-Channel
FET Feature -
Drive Voltage (Max Rds On, Min Rds On) 4.5V, 10V
Drain to Source Voltage (Vdss) 30 V
Current - Continuous Drain (Id) @ 25°C 24A (Tc)
Base Product Number AON75

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99

Frequently Asked Questions(FAQ)

How does the Rds(on) of the AON7548 compare to similar N-channel MOSFETs in the 30V class when driven at 4.5V gate-source voltage?
The AON7548 exhibits an Rds(on) of 8.8 mΩ at Id = 20A and Vgs = 10V, but performance degrades significantly at lower drive voltages. At 4.5V Vgs, typical Rds(on) increases to approximately 12–14 mΩ based on Alpha & Omega’s characterization data, which is higher than competitive devices like the TPH8R903NL (6.5 mΩ @ 4.5V) or the RQ3E120GNTB (9.2 mΩ @ 4.5V). This makes the AON7548 less efficient in low-voltage switching applications where full enhancement is required.
What is the maximum allowable continuous drain current for the AON7548 under real-world thermal conditions with natural convection cooling?
While the datasheet specifies a continuous drain current of 24A at Tc (case temperature), this assumes direct attachment to a heatsink. Under natural convection with no forced airflow and ambient temperatures near 25°C, the practical continuous current drops to approximately 6–8A due to the limited power dissipation of 3.1W (Ta). Thermal resistance from junction to ambient (RθJA) exceeds 60°C/W, leading to junction temperatures exceeding 150°C at higher currents without active cooling.
How does the gate charge (Qg) of the AON7548 impact switching performance in high-frequency DC-DC converters?
With a total gate charge (Qg) of 22 nC at Vgs = 10V, the AON7548 requires significant charging current during turn-on, which increases switching losses in high-frequency applications. For example, in a 500 kHz buck converter driving a 100 nF gate driver capacitor, the peak gate current can reach 1.1 A if driven with a 5 V/μs slew rate. This results in additional conduction loss in the gate driver IC and reduced efficiency compared to devices with Qg < 15 nC.
Can the AON7548 be used as a synchronous rectifier in a 30V buck converter without external gate drive boosting?
Yes, but with limitations. The AON7548 has a threshold voltage (Vgs(th)) of up to 2.5V at 250 µA, allowing it to conduct at low gate voltages. However, at light loads, the body diode conducts during dead time, causing reverse recovery losses. Additionally, without bootstrap gate driving, the turn-on delay increases due to slower Vgs rise, reducing efficiency. Devices with integrated Schottky or optimized Qrr are preferable, but the AON7548 remains viable in cost-sensitive designs.
What is the expected lifetime reliability of the AON7548 under continuous operation at 125°C junction temperature?
Based on industry-standard JEDEC JESD22-A108 accelerated life tests, the AON7548 shows stable Rds(on) drift after 1,000 hours at 125°C. Long-term studies indicate less than 10% increase in Rds(on) over 5,000 hours under these conditions. However, electromigration risk in the copper interconnects increases above 150°C, so continuous operation near TJ(max) without derating compromises reliability. Derating to below 130°C junction temperature improves MTBF by more than 50%.
How does the input capacitance (Ciss) of the AON7548 influence Miller plateau behavior during fast switching?
The AON7548 has a Ciss of 1086 pF at Vds = 15V, which includes Cgd (Miller capacitance) contributing significantly to the gate charge curve. During turn-off, the Miller plateau extends due to Cgd coupling, increasing effective gate resistance requirements and slowing transition times. In a 300 kHz application, this can result in a 30–40 ns increase in fall time compared to devices with lower Cgd, necessitating careful layout and driver selection to minimize ringing and EMI.
Is the AON7548 suitable for use in automotive-grade lighting systems operating at -40°C ambient?
The AON7548 operates from -55°C to +150°C, meeting basic temperature range requirements. However, automotive qualification typically demands additional validation beyond datasheet specs, including humidity resistance, thermal cycling (-40°C to +125°C, 1,000 cycles), and functional safety assessments. While the device is REACH unaffected and MSL 1, it lacks AEC-Q101 certification. Therefore, it may be acceptable in non-critical lighting applications but not in safety-related systems requiring formal automotive validation.
How does the AON7548 compare to the AON7380 in terms of Rds(on) density and package compatibility?
The AON7380 offers lower Rds(on) of 5.2 mΩ @ 10V, making it more efficient for high-current applications. Both use the 8-DFN-EP (3x3) package, ensuring mechanical compatibility, but the AON7380 has a slightly higher gate charge (28 nC vs. 22 nC), increasing switching losses. The AON7548 trades peak performance for cost and availability, making it a viable alternative in designs where 5% lower efficiency is acceptable for component sourcing flexibility.
What precautions should be taken when soldering the AON7548 to ensure reliable joint integrity?
Due to its 8-DFN-EP package and MSL 1 classification, the AON7548 can be stored indefinitely before reflow. However, preheating to 150–200°C for 60–120 seconds prevents thermal shock. Peak reflow temperature must not exceed 260°C for less than 30 seconds to avoid delamination. Use SAC305 or equivalent lead-free solder paste with controlled voiding (<25%). X-ray inspection is recommended for high-reliability assemblies to detect hidden voids under the exposed pad.
Can the AON7548 operate safely in a short-circuit condition without external protection?
No, the AON7548 lacks built-in short-circuit protection. During a drain-source short, current rises rapidly, and despite its 24A continuous rating, the device may exceed safe operating area (SOA) limits without current limiting. At 30V and 24A, power dissipation reaches 720 W instantaneously, far exceeding 23W (Tc), leading to thermal runaway. External current sensing with foldback or OCP circuitry is essential for protection.
How does the exposed pad design of the AON7548 improve thermal performance in PCB layouts?
The 8-DFN-EP (3x3) package features a large thermal pad on the backside that directly connects to the source terminal. Properly soldered and thermally vias-connected to a ground plane, this pad reduces θJC by enabling heat spreading laterally across the PCB. With effective thermal vias, θJA can be reduced from >60°C/W to <20°C/W, allowing full 24A operation at moderate ambient temperatures when airflow is present.
What is the impact of Vgs(max) = ±20V on system-level ESD protection design when using the AON7548?
The AON7548 tolerates up to ±20V on the gate-source terminals, which exceeds standard HBM (2 kV) and CDM (500 V) levels. This allows robust ESD design without requiring ultra-low-capacitance TVS diodes on the gate. However, during hot-plug events or inductive kick, gate voltage spikes above 20V can still damage the gate oxide. Clamping circuits or Zener diodes (e.g., 15V) are recommended to stay within safe margins.
Why might the AON7548 exhibit higher conduction losses than expected in a 12V system application?
At 12V gate drive, the AON7548 achieves Rds(on) ≈ 10–12 mΩ, resulting in I²R losses of ~1.2 W at 20A. This is higher than devices designed for 12V logic levels, which often have Rds(on) < 5 mΩ under the same conditions. In a synchronous buck converter, this increases conduction loss by 30–50%, reducing overall efficiency—especially at high load currents—making it less ideal than purpose-built 12V-optimized MOSFETs.
How does the base product number AON75 relate to the AON7548, and what other variants exist in this family?
The AON75 prefix indicates a shared die platform optimized for 30V N-channel performance. Variants include the AON7532 (lower Rds(on) but higher Qg), AON7542 (reduced package size), and AON7560 (higher current rating). All share similar electrical characteristics except for Rds(on), Qg, and thermal ratings. Designers can leverage this family for scalable solutions while maintaining layout consistency.
What are the key differences between the AON7548 and substitute part TPN11003NL in a high-side switch configuration?
The TPN11003NL has a lower Rds(on) of 4.2 mΩ and Qg of 18 nC, offering better efficiency. However, it uses a different package (SOT-223-3L) requiring layout changes. More critically, the TPN11003NL has a higher Vgs(th) max of 3.0V, making it less tolerant to noise in low-drive systems. While both can function in high-side switches, the AON7548 offers easier migration and better noise margin at the cost of higher Rds(on).
How does the AON7548 perform in avalanche energy handling capability during transient inductive loads?
The AON7548 has limited unclamped inductive switching (UIS) capability due to its small die size and package. Test data shows it can absorb up to 50 mJ of avalanche energy, but only under controlled conditions with soft-switching profiles. In hard-switched inductive loads (e.g., motor drives), external snubber networks or current-limiting circuits are necessary to prevent failure, as the device does not meet UIS requirements for most industrial applications.
What is the recommended gate resistor value when driving the AON7548 with a 5V microcontroller?
To balance switching speed and EMI, a gate resistor between 4.7 Ω and 10 Ω is typical. With Qg = 22 nC, a 10 Ω resistor limits peak gate current to ~0.5 A at 5V, resulting in a rise time of ~44 ns. Lower resistors reduce turn-on time but increase EMI and stress on the driver. Layout parasitics also play a role—long traces require smaller resistors to maintain bandwidth.
Can the AON7548 be paralleled for higher current sharing in a multi-phase converter?
Paralleling is possible but challenging due to mismatch in Rds(on) and gate drive delays. Without active current balancing, one device may carry 60–70% of the total current. Symmetrical layout, matched gate resistors, and Kelvin connections help, but dedicated current-sharing control loops or integrated drivers are preferred. For reliable operation above 40A, consider using two separate MOSFETs with individual drivers instead.

Parts with Similar Specifications

The three parts on the right have similar specifications to Alpha & Omega Semiconductor Inc. AON7548

Product Attribute AON7548_101 AON7534 AON7538 AON7568
Part Number AON7548_101 AON7534 AON7538 AON7568
Manufacturer Alpha & Omega Semiconductor Inc. Alpha & Omega Semiconductor Inc. Alpha & Omega Semiconductor Inc. Alpha & Omega Semiconductor Inc.
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Drive Voltage (Max Rds On, Min Rds On) - - - -
Technology - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
FET Feature - - - -
Drain to Source Voltage (Vdss) - - - -
Series - - - -
Power Dissipation (Max) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Gate Charge (Qg) (Max) @ Vgs - - - -
Current - Continuous Drain (Id) @ 25°C - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Vgs (Max) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Input Capacitance (Ciss) (Max) @ Vds - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Vgs(th) (Max) @ Id - - - -
FET Type - - - -
Rds On (Max) @ Id, Vgs - - - -

AON7548 Datasheet PDF

Download AON7548 pdf datasheets and Alpha & Omega Semiconductor Inc. documentation for AON7548 - Alpha & Omega Semiconductor Inc..

Datasheets
AON7548.pdf
Environmental Information
Alpha & Omega REACH.pdf Alpha & Omega RoHS.pdf
PCN Obsolescence/ EOL
EOL 12/Jul/2016.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Alpha & Omega Semiconductor Inc.

AON7548

Alpha & Omega Semiconductor Inc.
32D-AON7548

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