FSQ321

Description：IC OFFLINE SWITCH FLYBACK 8DIP
Series：FPS™
Mfr：onsemi
Package：Tube

SKU:74265efe2c32 Category: AC DC Converters, Offline Switchers Brand: onsemi

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Product introduction

FSQ321 is listed in the AC DC Converters, Offline Switchers range at ChipApex. The manufacturer field lists onsemi. Its product description is IC OFFLINE SWITCH FLYBACK 8DIP. Review the specifications below when checking this part for your BOM.

AC DC Converters, Offline Switchers specifications for FSQ321

Description：IC OFFLINE SWITCH FLYBACK 8DIP
Series：FPS™
Mfr：onsemi
Package：Tube
Output Isolation：Isolated
Internal Switch(s)：Yes
Voltage - Breakdown：650V
Topology：Flyback
Voltage - Start Up：12 V
Voltage - Supply (Vcc/Vdd)：8V ~ 20V
Duty Cycle：-
Frequency - Switching：55kHz ~ 67kHz
Fault Protection：Current Limiting, Over Load, Over Temperature, Over Voltage
Control Features：Sync
Operating Temperature：-40°C ~ 85°C (TA)
Package / Case：8-DIP (0.300", 7.62mm)
Supplier Device Package：8-DIP
Mounting Type：Through Hole
Grade：-
Qualification：-
Power (Watts)：12 W

AC DC Converters, Offline Switchers datasheet and documents for FSQ321

FSQ321

AC DC Converters, Offline Switchers Overview

The FSQ321 is an AC-DC offline switcher from onsemi, designed for flyback topologies with integrated PWM control and SenseFET. It supports an input voltage range of 85 to 265 VAC. The device features a switching frequency of up to 55 kHz and delivers a maximum current of 1.5 A. It operates within a temperature range of -40 °C to +85 °C. Available in 8-pin PDIP W packages, it includes a drain source resistance of 14 Ω.

AC DC Converters, Offline Switchers Feature Summary

Integrates Pulse Width Modulation (PWM) controller and SenseFET for valley switching operation
Designed for low electromagnetic interference (EMI) and high power conversion efficiency
Requires minimal external components for implementation

AC DC Converters, Offline Switchers Applications

Low EMI and high efficiency power supplies
Valley switching converters
Flyback topology AC-DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific package variant, as the FSQ321 family includes both DIP and SOP configurations. Confirm availability status, as some variants are marked as discontinued. Ensure the selected part matches the required thermal and electrical specifications for the target application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs prioritizing reduced EMI through valley switching technology. Consider the 1.5 A current limit and 14 Ω resistance when sizing magnetic components. Verify that the operating temperature range meets the environmental requirements of the end product.

AC DC Converters, Offline Switchers Part Context

This component belongs to the FSQ series of power switches by onsemi. These devices combine control logic with power MOSFETs to simplify offline power supply designs. The series targets applications requiring efficient energy conversion with simplified bill of materials.