FSQ510

Product Summary

The FSQ510 is an integrated Pulse-Width Modulation (PWM) controller and Sense FET specifically designed for quasi-resonant offline Switch Mode Power Supplies (SMPS) with minimal external components. The FSQ510 includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), 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 solution, the FSQ510 can reduce total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. The device provides a basic platform that is well suited for cost-effective designs of quasi-resonant switching flyback converters. The applications of the FSQ510 include Cell Phone Chargers and Auxiliary Power Supplies for PC and White Goods.

Parametrics

FSQ510 absolute maximum ratings: (1)VSTR, VSTR Pin Voltage: 700 V min; (2)VDS, Drain Pin Voltage: 700 V min; (3)VCC, Supply Voltage: 20 V max; (4)VFB, Feedback Voltage Range: -0.3 to 6.5 V; (5)VSync, Sync Pin Voltage: -0.3 to 6.5 V; (6)TJ, Operating Junction Temperature: +150℃; (7)TA, Operating Ambient Temperature: -25 +85℃; (8)TSTG, Storage Temperature: -55 +150℃.

Features

FSQ510 features: (1)Uses a DMOS Integrated Power Switch; (2)Optimized for Quasi-Resonant Converter (QRC); (3)Low EMI through Variable Frequency Control and Inherent Frequency Modulation; (4)High Efficiency through Minimum Voltage Switching; (5)Extended Quasi-Resonant Switching for Wide Load Ranges; (6)Small Frequency Variation for Wide Load Ranges; (7)Advanced Burst-Mode Operation for Low Standby Power Consumption; (8)Pulse-by-Pulse Current Limit; (9)Various Protection Functions: Overload Protection (OLP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis; (10)Under-Voltage Lockout (UVLO) with Hysteresis; (11)Internal Start-up Circuit; (12)Internal High-Voltage SenseFET (700V); (13)Built-in Soft Start (5ms).

Diagrams