FSCQ0765RT - Fairchild Semiconductor
Description
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fairchildsemi.
com
Green Mode Fairchild Power Switch (FPSTM) for Quasi-Resonant Switching Converter
Features
• Optimized for Quasi-Resonant Converter (QRC) • Advanced Burst-Mode operation for under 1 W standby www.
DataSheet4U.
com power consumption • Pulse by Pulse Current Limit (5A) • Over load protection (OLP) - Auto restart • Over voltage protection (OVP) - Auto restart • Abnormal Over Current Protection (AOCP) - Latch • Internal Thermal Shutdown (TSD) - Latch • Under Voltage Lock Out (UVLO) with hysteresis • Low Startup Current (typical : 25uA) • Low Operating Current (typical : 4mA) • Internal High Voltage SenseFET • Built-in Soft Start (20ms) • Extended Quasi-resonant Switching for Wide Load Range OUTPUT POWER TABLE
PRODUCT FSCQ0765RT FSCQ1265RT FSCQ1565RT 230VAC ±15%(2) Open Frame(1) 100 W 170 W 210 W 85-265VAC Open Frame(1) 85 W 140 W 170 W
FSCQ0765RT
Table 1.
Notes: 1.
Maximum practical continuous power in an open frame design at 50°C ambient.
2.
230 VAC or 100/115 VAC with doubler.
Typical Circuit Application
• CTV • DVD Receiver • Audio Power Supply
AC IN Vo
Description
Drain
In general, Quasi-Resonant Converter (QRC) shows lower EMI and higher power conversion efficiency compared to the conventional hard switched converter with a fixed switching frequency.
Therefore, it is well suited for applications that are sensitive to the noise, such as color TV and audio.
The FSCQ0765RT is an integrated Pulse Width Modulation (PWM) controller and Sense FET specifically designed for Quasi-resonant off-line Switch Mode Power Supplies (SMPS) with minimal external components.
The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature compensated precise current sources for a loop compensation and self protection circuitry.
Compared with discrete MOSFET and PWM controller solution, it can reduce total cost, component count, size and weight simultan...
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