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Fairchild
Fairchild Semiconductor
Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS).

Features
■ Optimized for Quasi-Resonant Converters (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync-Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
■ Adapter

Part Name(s) : FSDM0565RE
Fairchild
Fairchild Semiconductor
Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation

Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation- Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller 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 a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce 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 Quasi-Resonant Switching flyback converters.

Features
Optimized for Quasi-Resonant Converters (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
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
Simple Scheme for Sync Voltage Detection
Pulse-by-Pulse Current Limit
Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Internal
Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP)
Under-Voltage Lockout (UVLO) with Hysteresis
Internal Startup Circuit
Internal High-Voltage Sense FET (650V)
Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
Adapter

Fairchild
Fairchild Semiconductor
Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), Leading-Edge Blanking (LEB), optimized gate driver, internal softstart, temperature-compensated precise current sources for a loop compensation, and self-protection circuitry.

Features
■ Optimized for Quasi-Resonant Converter (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
■ Adapter

Fairchild
Fairchild Semiconductor
Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller 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 a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce 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 Quasi-Resonant Switching flyback converters.

Features
■ Optimized for Quasi-Resonant Converter (QRC)
Low EMI through Variable Frequency Control and AVS
   (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync-Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection functions: Overload Protection
   (OLP), Over-Voltage Protection (OVP), Abnormal
   Over-Current Protection (AOCP), Internal Thermal
   Shutdown (TSD) with Hysteresis, Output Short
   Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR,
   STB, and DVD & DVD Recorder
■ Adapter

Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller 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 a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce 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 Quasi-Resonant Switching flyback converters.

Features
■ Optimized for Quasi-Resonant Converters (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection Functions: Overload Protection
   (OLP), Over-Voltage Protection (OVP), Abnormal
   Over-Current Protection (AOCP), Internal Thermal
   Shutdown (TSD) with Hysteresis, Output Short
   Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
■ Adapter

Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller 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 a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce 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 Quasi-Resonant Switching flyback converters.

Features
■ Optimized for Quasi-Resonant Converters (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Startup Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (17.5ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
■ Adapter

Fairchild
Fairchild Semiconductor
Description : Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation - Low EMI and High Efficiency

Description
A Quasi-Resonant Converter (QRC) generally shows Lower EMI and higher Power conversion efficiency than a conventional hard-Switched converter with a fixed Switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for Quasi-Resonant Operation and Alternating Valley Switching (AVS). The PWM controller 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 a loop compensation, and self-protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSQ-series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of Quasi-Resonant Switching flyback converters.

Features
■ Optimized for Quasi-Resonant Converter (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
■ 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
■ Simple Scheme for Sync Voltage Detection
■ Pulse-by-Pulse Current Limit
■ Various Protection functions: Overload Protection  (OLP), Over-Voltage Protection (OVP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) with Hysteresis, Output Short Protection (OSP)
■ Under-Voltage Lockout (UVLO) with Hysteresis
■ Internal Start-up Circuit
■ Internal High-Voltage Sense FET (650V)
■ Built-in Soft-Start (15ms)

Applications
Power Supply for LCD TV and Monitor, VCR, SVR, STB, and DVD & DVD Recorder
■ Adapter

Fairchild
Fairchild Semiconductor
Description : Fairchild Power Switch(FPS)

Description
The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consists of a high voltage Power SenseFET and a current mode PWM IC. The integrated PWM controller includes the fixed oscillator, the under voltage lock out, the leading edge blanking, the optimized gate turn-on/turn-off driver, the thermal shut down protection, the over voltage protection, and the temperature compensated precision current sources for loop compensation and fault protection circuitry. Compared to a discrete MOSFET and a controller or a RCC Switching converter solutions, a Fairchild Power Switch(FPS) can reduce the total number of components, design size, and weight, so it will improve efficiency, productivity, and system reliability. It has a basic platform well suited for cost-effective design in a Quasi-Resonant converter as a C-TV Power supply.

Features
• Quasi Resonant Converter Controller
• Internal Burst Mode Controller for Stand-by Mode
• Pulse by Pulse Current Limiting
• Over Current Latch Protection
• Over Voltage Protection (Vcc: Min. 27V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode

Part Name(s) : AN-6920MR FAN6921MR
Fairchild
Fairchild Semiconductor
Description : Integrated Critical-Mode PFC / Quasi-Resonant Current-Mode PWM Controller FAN6920

This application note presents practical step-by-step design considerations for a Power supply system employing Fairchild’s FAN6920 PFC / PWM combination controller, an integrated Boundary Conduction Mode (BCM) Power Factor Correction (PFC) controller and Quasi-Resonant (QR) PWM controller. Figure 1 shows the typical application circuit, where the BCM PFC converter is in the
front end and the dual-Switch Quasi-Resonant flyback converter is in the back end.

ETC2
Unspecified
Description : Fairchild Power Switch(FPS)

[Fairchild]

Description
The Fairchild Power Switch(FPS) product family is specially designed for an off-line SMPS with minimal external components. The Fairchild Power Switch(FPS) consists of a high voltage Power SenseFET and a current mode PWM IC.

Features
• Quasi Resonant Converter Controller
• Internal Burst Mode Controller for Stand-by Mode
• Pulse by Pulse Current Limiting
• Over Current Latch Protection
• Over Voltage Protection (Vsync: Min. 11V)
• Internal Thermal Shutdown Function
• Under Voltage Lockout
• Internal High Voltage Sense FET
• Auto-Restart Mode
• Primary Side Regulation

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