FAN6755 − Highly-Integrated Green-Mode PWM Controller

This highly integrated PWM controller provides several features to enhance the performance of flyback converters.

To minimize standby power consumption, a proprietary adaptive green-mode function reduces switching frequency at light-load condition. To avoid acoustic noise problems, the minimum PWM frequency is set above 23kHz. This 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 the 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 90V_AC to 264V_AC.

FAN6755W/UW provides many protection functions. The internal feedback open-loop protection circuit protects the power supply from open feedback loop condition or output short condition. It also has line under-voltage protection (brownout protection) and over-voltage protection using an input voltage sensing pin (V_IN).

FAN6755W/UW is available in a 7-pin SOP package.

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Product Status/Pricing/Packaging

Index	Product	Product & Eco Status	*Pricing	Packaging & Packing Info	**Package Marking Convention	Qualification Support	Compliance Certificates
0	FAN6755UWMY	Full Production Green as of Jan 2011	$0.46	SO 7L NB Details SO 7L NB Drawing  TAPE REEL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:6755U Line 3:WMYB	ESD (HBM) :  5500  V Moisture Sensitivity Level (MSL) :  1   Max Reflow Temp :  260	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

• Fairchild 1,000 piece Budgetary Pricing. *
• If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
• Top mark packaging information for product FAN6755 is available. **

Features

• 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 Load
• Proprietary 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), V_DD Over-Voltage Protection (OVP), Over-Temperature Protection (OTP), and Line Over-Voltage Protection
• Soft Gate Drive with Clamped Output Voltage: 18V
• V_DD 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 ProtectionGeneral-purpose switch-mode power supplies and flyback power converters, including:
• LCD Monitor Power Supply
• Open-Frame SMPS

Applications

Notebook PC LCD Monitor LCD TV

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