onsemi FSQ321
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.| Part No. | FSQ321 |
|---|---|
| Datasheet | FSQ321 Download |
| Manufacturer |  onsemi |
| Description | Green Mode Power Switch |
| Buy | Stock & Price |
DESCRIPTION
A Valley Switching Converter generally shows lower EMI and higher power conversion efficiency than a conventional hard−switched converter with a fixed switching frequency. 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 for cost−effective designs of valley switching fly−back converters.FEATURES
● Optimized for Valley Switching Converter (VSC)● Low EMI through Variable Frequency Control and Inherent Frequency Modulation
● High Efficiency through Minimum Voltage Switching
● Narrow Frequency Variation Range Over Wide Load and Input Voltage Variation
● Advanced Burst−Mode Operation for Low Standby Power Consumption
● Pulse−by−Pulse Current Limit
● Protection Functions: Overload Protection (OLP), Over−Voltage Protection (OVP), Abnormal Over−Current Protection (AOCP), Internal The...
