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    1. Home/
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    3. Power/
    4. Power Supplies/
    5. L4985B STMicroelectronics

    L4985B [STMicroelectronics]

    L4985B
    L4985B

    Part No:

    L4985B

    Category:

    Power Supplies

    Manufacturer:

    STMicroelectronics

    Description:

    Continuous conduction mode (CCM) PFC controller with high voltage startup

    Datasheet:

    Product FAQ

    1. Is L4985B available for RFQ?

    Yes. L4985B by STMicroelectronics is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

    2. Why is there no fixed price for L4985B?

    Pricing for L4985B can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

    3. What are the key specifications of L4985B?

    L4985B is a STMicroelectronics Power Supplies with Packing Type: Tube and Package Name: SO-8. Review the product details or submit an RFQ if you need confirmation before purchase.

    4. How fast can I get a quote for L4985B?

    Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

    5. How soon can L4985B be shipped?

    If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

    6. Can you suggest alternatives to L4985B?

    Yes. If L4985B is unavailable, obsolete, or does not meet your required lead time, we can help check similar STMicroelectronics Power Supplies parts or compatible alternatives.

    RFQ

    Part Number:

    L4985B

    Manufacturer:

    STMicroelectronics

    Looking for Pricing? Contact us for volume pricing.

    IMPORTANT NOTICE

    Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

    Featured Product

    Stock Status:

    Available for RFQ

    Pricing:

    Request Volume Pricing

    Quote Response:

    Within 24 Hours

    Shipping:

    In-stock parts ship in 1–2 business days

    Specification

    Type
    Parameter
    ECCN US
    EAR99
    ECCN EU
    NEC
    Packing Type
    Tube
    RoHS Status
    Grade
    Industrial
    Package Name
    SO-8
    ECCN US
    EAR99
    ECCN EU
    NEC
    Packing Type
    Tube
    RoHS Status
    Grade
    Industrial
    Package Name
    SO-8

    Products Detail

    The L4985 is a peak current-mode PFC controller for boost converter with a proprietary multiplier “emulator” which in addition to the innovative THD optimizers guarantee very low Total Harmonic Distortion (THD) performance in all operating conditions. The device comes in a pin SO package and offers a high performance/low-component count solution for CCM-operated boost PFC pre-regulators in EN61000-3-2 and JEIDA-MITI compliant applications, in a power range that spans from few hundred W to some kW.


    The device, thanks to a proprietary off-time modulator, operates in quasi-fixed frequency in all operating conditions. Two options are available, 65 kHz for A and 130 kHz for B.


    The 800V high voltage start-up block includes also the circuitry to discharge the X-capacitors of the EMI filter to a safe level. This allows the unit to meet safety regulation (such as IEC 61010-1 or IEC 62368-1) without using the traditional discharge resistor in parallel to the X-capacitors.


    The device features low consumption and disable functions allowing usage in applications supposed to comply even with the latest energy saving requirements issued by Energy Star, the Department of Energy (DoE) in the United States, the European Code of Conduct, the European Union’s Ecodesign Directive, and other guidelines.


    In addition to an overvoltage protection able to keep the output voltage under control during transient conditions, the IC is provided also with a protection against feedback loop failures or erroneous settings and boost inductor saturation. The brownout protection function allows to design medical equipment according to the latest regulations driven by IEC 60601-1-2 which requires the output regulation in case of mains dips lasting up to 500 msec. Soft-start limits the peak current.


    The totem-pole output stage, capable of 0.7 A source and 1.5 A sink current, is suitable for big MOSFET or IGBT drives.

    Key features
    • Peak current mode CCM-operated
    • 800 V high voltage startup with integrated input voltage sensing
    • Active input filter capacitor discharge
    • Proprietary multiplier “emulator” with minimum THD of line current in all operating conditions (CCM and DCM)
    • Extremely few external components
    • Protections: feedback loop failure, OVP, OCP, inductor saturation, brown-in, brownout (compliant to medical SMPS standards)
    • Inductor current sense
    • Disable and low consumption function
    • In-rush current monitoring
    • Soft-start for smooth startup
    • 1.2% (@ Tj = 25 °C) internal reference voltage
    • 65 kHz (A version) and 130 kHz (B version) switching frequency
    • SO8 package

    Documents

    Data sheet:

    Data sheet

    Material Declaration:

    Material Declaration
    Shipping & Warranty

    Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)

    Unishop Global Export: 1-7 days, $40.00

    Guaranteed Delivery: Door-to-door in 30 days

    Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.

    Feature

    • 30-Day Guarantee
      30-Day Guarantee
    • Fasted Delivery
      Fasted Delivery
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      Hassle-Free Returns
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      Secure payment method

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