mWSaver™ Fairchild Power Switch (FPS™)General DescriptionThe FSB147H is a next-generation, green-mode Fairchild Power Switch (FPS™) incorporating Fairchild’s innovative mWSaver™ technology, which dramatically reduces standby and no-load power consumption, enabling conformance to all worldwide Standby Mode efficiency guidelines. It integrates an advanced current-mode pulse width modulator (PWM) and an avalanche-rugged 700V SenseFET in a single package, allowing auxiliary power designs with higher standby energy efficiency, reduced size, improved reliability, and lower system cost than previous solutions. Fairchild Semiconductor’s mWSaver™ technology offers best-in-class minimum no-load and light-load power consumption. An innovative Ax-CAP™ method, one of the five proprietary mWSaver™ technologies, minimizes losses in the EMI filter stage by eliminating the X-cap discharge resistors while still meeting IEC61010-1 safety requirement. mWSaver™ Green Mode gradually decreases switching frequency as load decreases to minimize switching losses. A new proprietary asynchronous jitter decreases EMI emission and built-in synchronized slope compensation allows stable peak-current-mode control over a wide range of input voltage. The proprietary internal line compensation ensures constant output power limit over entire universal line voltage range. Requiring a minimum number of external components, FSB147H provides a basic platform that is well suited for the cost-effective flyback converter design with low standby power consumption. Product Status/Pricing/Packing
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Features
■ Achieve Low No-Load Power Consumption Less than 40mW at 230VAC (EMI Filter Loss Included) ■ Meet 2013 ErP Standby Power Regulation (Less than 0.5W Consumption with 0.25W Load) for ATX Power and LCD TV Power ■ Eliminate X-Cap Discharge Resistor Loss with Ax-CAP™ Technology ■ Linearly Decreased Switching Frequency at Light-Load Condition and Advanced Burst Mode Operation at No-Load Condition ■ 700V High-Voltage JFET Startup Circuit to Eliminate the Startup Resistor Loss Highly Integrated with Rich Features ■ Internal Avalanche-Rugged 700V SenseFET ■ Built-in 10ms Soft-Start ■ Peak-Current-Mode Control ■ Cycle-by-Cycle Current Limiting ■ Leading-Edge Blanking (LEB) ■ Synchronized Slope Compensation ■ Proprietary Asynchronous Jitter to Reduce EMI Advanced Protection ■ Internal Overload / Open-Loop Protection (OLP) ■ VDD Under-Voltage Lockout (UVLO) ■ VDD Over-Voltage Protection (OVP) ■ Constant Power Limit (Full AC Input Range) ■ Internal Auto Restart Circuit (OLP, VDD OVP, OTP) ■ Internal OTP Sensor with Hysteresis ■ Adjustable Peak Current Limit Applications
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