FSQ321LX AC-DC Power Conversion by ON Semiconductor

650V Integrated Power Switch with Valley Switching control for 10Watt offline flyback converters

Status: Active
Series: FSQ321
RoHS: Compliant
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A Valley Switching Converter generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for valley switching operation with minimal external components. The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout, Leading Edge Blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise current sources for loop compensation, and self-protection circuitry. Compared with discrete MOSFET and PWM controller solutions, the FSQ-series reduces total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of valley switching fly-back converters.

Prices starting from US$0.37


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Features

Optimized for Valley Switching (VSC)
Low EMI through Variable Frequency Control andInherent Frequency Modulation
High Efficiency through Minimum Voltage Switching
Narrow frequency Variation Range over Wide Load andInput Voltage Variation
Advanced Burst-Mode Operation for Low StandbyPower Consumption
Pulse-by-Pulse Current Limit
Various Protection functions: Over Load Protection(OLP), Over Voltage Protection (OVP), AbnormalOver Current Protection (AOCP), Internal ThermalShutdown (TSD)
Under Voltage Lock Out (UVLO) with Hysteresis
Internal Start-up Circuit
Internal High-Voltage Sense FET (650V)
Built-in Soft-Start (15ms)
Applications
DVD/Set Top Boxes

Specifications

Description FSQ321
Compliance Pb-free Halide free
Control Mode Current Mode
fsw Typ (kHz) Variable
RDS(ON) Typ (Ω) 14
V(BR)DSS Max (V) 650
IPeak (mA) 600
HV Start-up Min (V) Yes
UVLO Yes
Short Circuit Protection Yes
Latch No
Package Type PDIP-8 GW

Alternative Descriptions

SWITCH, PWM, FET, 12W, 0.6A, 8SOP | Farnell
Fps For Dvdp/Stb/Reel |Onsemi FSQ321LX | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a FSQ321LX?

Additional datasheets, footprints and schematics for FSQ321LX are listed on our Part Details page. You can also find images and similar parts to FSQ321LX on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for FSQ321LX on our Product Comparison page. Access via the 'View Pricing & Stock' button to view FSQ321LX price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does FSQ321LX fall under?

The FSQ321LX is listed under Power Management > AC-DC Power Conversion > Offline Regulators.

Can I view similar or alternative parts?

You can view similar parts to FSQ321LX when available in the Offline Regulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the FSQ321LX you can contact the distributor directly for product support, shipping queries etc.

Is the FSQ321LX RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

Which authorised distributors for FSQ321LX have stock available?

Authorised distributors including Farnell and Newark Electronics have stock available or on a lead time for FSQ321LX.

How do I check stock and lead times for all distributors?

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