Onsemi FAN6755W

Beschreibung

Not recommended for new design as of 09-Sep-2013This highly integrated PWM controller provides several features to enhance the performance of flyback converters.To minimize standby power consumption, a proprietary adaptive Green Mode reduces switching frequency at light-load condition. To avoid acoustic noise problems, the minimum PWM frequency is set above 23kHz. The Green-Mode function enables the power supply to meet international power conservation requirements, such as Energy Star®. With the internal high-voltage startup circuitry, the power loss caused by bleeding resistors is also eliminated. To further reduce power consumption, FAN6755W/UW uses a BiCMOS process, which allows an operating current of only 2mA. The standby power consumption can be under 100mW for most of LCD monitor power supply designs.FAN6755W/UW integrates a frequency-hopping function that reduces EMI emission of a power supply with minimum line filters. Its built-in synchronized slope compensation achieves a stable peak-current-mode control and improves noise immunity. The proprietary, external line compensation ensures constant output power limit over a wide AC input voltage range from 90VAC to 264VAC.FAN6755W/UW provides many protection functions. The internal feedback open-loop protection circuit protects the power supply from an open feedback loop condition or an output short condition. It also has line under-voltage protection (brownout protection) and over-voltage protection using an input voltage sensing pin (VIN).FAN6755W/UW is available in a 7-pin SOP package

Eigenschaften

• mWSaver™ Technology Provides
• Industry's Best-in-Class Standby Power
• 100mW at 25mW Load for LCDM Adaptor
• Internal High-Voltage JFET Startup
• Low Operating Current Maximum: 2mA
• Adaptive Decreasing of PWM
• Frequency to 23KHz at Light-Load Condition, Improved Light-Load Efficiency
• Feedback Impedance Switching
• During Minimum Load or No LoadProprietary Asynchronous
• Frequency Hopping Reduced EMI
• Fixed PWM Frequency: 65KHz (FAN6755W), 130KHz (FAN6755UW)
• Internal Leading-Edge Blanking
• Built-in Synchronized Slope Compensation
• Auto-Restart Protection: Feedback Open-Loop Protection (OLP), VDD Over-Voltage Protection (OVP), Over-Temperature Protection (OTP), and Line Over-Voltage Protection
• Soft Gate Drive with Clamped
• Output Voltage: 18V
• VDD Under-Voltage Lockout (UVLO)
• Programmable Constant Power Limit (Full AC Input Range)
• Internal OTP Sensor with Hysteresis
• Build-in 5ms Soft-Start Function
• Input Voltage Sensing (VIN Pin) for Brown-In/Out Protection with Hysteresis and Line Over-Voltage Protection

Typische Anwendungen

• Open-Frame SMPS
• LCD Monitor Power Supply

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers