FAN6863

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Highly Integrated Green-Mode PWM Controller

General Description

A highly integrated PWM controller, FAN6863 provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary Green Mode provides off-time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load conditions, the power supply enters Burst Mode, which completely shuts off PWM output. Output restarts just before the supply voltage drops below the UVLO lower limit. Green Mode enables power supplies to meet international power conservation requirements.

The FAN6863 is designed for SMPS and integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. The built-in synchronized slope compensation provides proprietary sawtooth compensation for constant output power limit over universal AC input range. The gate output is clamped at 13.5V to protect the external MOSFET from over-voltage damage.

Other protection functions include SENSE pin Short-Circuit Protection (SSCP), VDD Over-Voltage Protection (OVP), and Over-Temperature Protection (OTP). For OTP, an external NTC thermistor can be applied to sense the ambient temperature. When VDD OVP or OTP is activated, an internal latch circuit latches off the controller.

Product Status/Pricing/Packing

Product Product Status Eco Status *Pricing Package Type Leads Packing Method Package Drawing **Package Marking Convention Qualification Support RoHS IPC1752 RoHS/REACH/
JIG Certificate of Compliance
FAN6863TY Full Production Green as of Jul 2010 $0.368 SSOT 6L 6 TAPE REEL PDF Line 1:&E (Space)
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Moisture Sensitivity Level (MSL) :  1  
Max Reflow Temp :  260  
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Features

  • Low Standby Power: Under 0.1W
  • Low Startup Current: 8µA
  • Low Operating Current at Green Mode: 600µA
  • Peak-Current Mode Operation with Cycle-by-Cycle Current Limiting
  • PWM Frequency Continuously Decreasing with Burst Mode at Light Loads
  • VDD Over-Voltage Protection (OVP)
  • Constant Output Power Limit (Full AC Input Range)
  • Internal Latch Circuit (FAN6863L) for OVP, OTP
  • SENSE Pin Short-Circuit Protection (SSCP)
  • Fixed PWM Frequency (65KHz) with Frequency Hopping
  • Feedback Open-Loop Protection: 60ms Delay
  • GATE Output Maximum Voltage Clamp: 13.5V
  • Soft-Start Time: 5ms
  • Soft Driving for EMI Improvement
  • Full Range Frequency Hopping
  • Internal OTP Sensor with Hysteresis
  • GATE Driving Capability: 400mA

Applications

  • DVD
  • External AC-DC Merchant Power Supply - Wireless Communications
  • Notebook PC
  • STB
  • Wireless LAN Access Point/Router
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