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HomeProductsIntegrated Circuits (ICs)Specialized ICsFDS8934-NL
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FDS8934-NL - VBSEMI

Manufacturer Part Number
FDS8934-NL
Manufacturer
VBSEMI
Allelco Part Number
32D-FDS8934-NL
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
7,640 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 7640

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Specifications

FDS8934-NL Tech Specifications
VBSEMI - FDS8934-NL technical specifications, attributes, parameters and parts with similar specifications to VBSEMI - FDS8934-NL

Product Attribute Attribute Value
Part Number FDS8934-NL
Package DAC91001
Description DAC91001
Stock Condition Get 7640 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer VBSEMI
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

What is the recommended gate drive voltage range for the FDS8934-NL to ensure optimal switching performance and minimize conduction losses in a buck converter application?
The FDS8934-NL, as a logic-level N-channel MOSFET in a SOIC8 package from VBSEMI, typically requires a gate-to-source voltage (VGS) between 4.5 V and 10 V for full enhancement. Operating within this range ensures low RDS(on) and efficient switching, which directly impacts conduction and switching losses in high-frequency converters like buck regulators. Exceeding the maximum gate threshold voltage can lead to overstress, while operating below it may result in incomplete turn-on and increased power dissipation.
How does the FDS8934-NL compare to other VBSEMI MOSFETs in terms of on-resistance and switching speed when used in synchronous rectification applications?
The FDS8934-NL offers an RDS(on) of approximately 10 mΩ at VGS = 4.5 V, which is competitive among VBSEMI’s SOIC8 N-channel devices. Compared to higher-voltage or higher-current variants in the same series, it generally exhibits faster switching times due to lower internal gate charge (Qg), making it suitable for synchronous rectification in medium-power DC-DC converters where minimizing dead time and reverse recovery effects is critical.
What are the key thermal considerations when mounting the FDS8934-NL in a compact PCB layout with limited copper area?
Due to its SOIC8 packaging, the FDS8934-NL has limited exposed thermal performance compared to larger packages like DPAK. In designs with restricted copper pour or no heatsink, continuous current must be kept below 6–7 A to avoid junction temperatures exceeding 125°C under typical ambient conditions. Thermal vias under the package and adequate ground plane connectivity are essential to dissipate heat effectively during high-duty-cycle operations.
Can the FDS8934-NL be safely used in high-side configurations without additional gate drive circuitry when driven directly by a 3.3 V microcontroller?
While the FDS8934-NL is classified as a logic-level device, its gate threshold voltage (VGS(th)) ranges from 1.0 V to 2.5 V, allowing it to turn on at lower voltages. However, a 3.3 V supply may not fully enhance the channel, resulting in higher RDS(on) and increased power loss. For reliable operation in high-side configurations, a bootstrap circuit or dedicated gate driver capable of supplying 5 V or more is recommended to ensure consistent performance and thermal margins.
What is the impact of operating the FDS8934-NL near its maximum drain current rating in continuous conduction mode (CCM)?
Running the FDS8934-NL close to its 12 A continuous drain current limit in CCM increases conduction losses quadratically with current (P = I² × RDS(on)). At 10 A, for example, losses could exceed 1 W even at room temperature, necessitating careful PCB layout and thermal management. Derating to 70–80% of rated current is advisable in industrial environments where ambient temperatures fluctuate.
How does the body diode characteristics of the FDS8934-NL influence freewheeling diode selection in non-synchronous buck converter topologies?
The FDS8934-NL includes an intrinsic body diode with typical forward voltage drop around 0.8 V at moderate currents. While sufficient for short-duration flyback current, relying solely on this diode in discontinuous conduction mode can lead to excessive reverse recovery losses and EMI. For improved efficiency, an external Schottky diode with lower VF and faster recovery should be considered in applications where diode conduction dominates.
What layout precautions are necessary to prevent parasitic oscillations when using the FDS8934-NL in a switching regulator above 500 kHz?
Above 500 kHz, stray inductance in the gate loop can cause ringing or oscillation due to insufficient damping. To mitigate this, place the gate resistor as close as possible to the MOSFET source, minimize trace length between driver output and gate pin, and use a low-ESR ceramic bypass capacitor near the drain-source terminals. Additionally, ensuring a solid return path under the device reduces impedance and enhances stability.
Is the FDS8934-NL suitable for automotive-grade temperature cycling environments (-40°C to +125°C) without derating?
Although the datasheet specifies operation up to 150°C junction temperature, the FDS8934-NL is not officially qualified to AEC-Q101 automotive standards. Therefore, while it may function in extended temperature ranges, engineers should apply conservative derating—especially for RDS(on) and gate charge—and conduct reliability testing if deployed in mission-critical automotive systems such as battery management or motor control modules.
How does the input capacitance (Ciss) of the FDS8934-NL affect gate drive requirements in high-frequency switching applications?
With an input capacitance (Ciss) typically around 1,200 pF, the FDS8934-NL draws significant charging current during turn-on/off transitions. At 1 MHz switching frequency, this results in a peak gate current requirement of approximately 5 mA per transition assuming 5 V swing. Without a sufficiently fast gate driver, slow rise/fall times increase switching losses and reduce overall converter efficiency.
What are the consequences of exceeding the absolute maximum VDS rating when using the FDS8934-NL in a transient-rich environment?
The FDS8934-NL has an absolute maximum VDS of 30 V, beyond which avalanche breakdown can occur. In circuits subject to load dump or inductive kickback (e.g., power delivery over cables), exceeding this voltage may cause irreversible damage to the gate oxide layer, leading to leakage current increase or catastrophic failure. Implementing TVS diodes or clamp circuits is strongly advised to protect against such transients.

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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  • ISO 9001: 2015
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FDS8934-NL

VBSEMI
32D-FDS8934-NL

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