Is FSQ321 available for RFQ?

Yes. FSQ321 by Onsemi is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

Why is there no fixed price for FSQ321?

Pricing for FSQ321 can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

What are the key specifications of FSQ321?

FSQ321 is a Onsemi Power Supplies with Short Circuit Protection: Yes and HV Start-up Min (V): Yes. Review the product details or submit an RFQ if you need confirmation before purchase.

How fast can I get a quote for FSQ321?

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.

How soon can FSQ321 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.

Can you suggest alternatives to FSQ321?

Yes. If FSQ321 is unavailable, obsolete, or does not meet your required lead time, we can help check similar Onsemi Power Supplies parts or compatible alternatives.

FSQ321 - Onsemi | Electronic Components

Name: FSQ321
Brand: Onsemi
SKU: FSQ321

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.

Application

DVD/Set Top Boxes

Feature

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)