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FAN4803

Features: • Internally synchronized PFC and PWM in one 8-pin IC• Patented one-pin voltage error amplifier with advanced input current shaping technique• Peak or average current, continuous boost, leading edge PFC (Input Current Shaping Technology)• High efficien...

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SeekIC No. : 004340368 Detail

FAN4803: Features: • Internally synchronized PFC and PWM in one 8-pin IC• Patented one-pin voltage error amplifier with advanced input current shaping technique• Peak or average curre...

FAN4803 Data Sheet

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Part Number:
FAN4803
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Internally synchronized PFC and PWM in one 8-pin IC
• Patented one-pin voltage error amplifier with advanced  input current shaping technique
• Peak or average current, continuous boost, leading edge PFC (Input Current Shaping Technology)
• High efficiency trailing-edge current mode PWM
• Low supply currents; start-up: 150µA typ., operating: 2mA typ.
• Synchronized leading and trailing edge modulation
• Reduces ripple current in the storage capacitor between the PFC and PWM sections
• Overvoltage, UVLO, and brownout protection
• PFC VCCOVP with PFC Soft Start


Pinout

Connection Diagram


Specifications

Parameter Min Max Unit
ICC Current (average)   40 mA
VCC MAX   18.3 V
ISENSE Voltage -5 1 V
Voltage on Any Other Pin GND 0.3 VCC+0.3 V
Peak PFC OUT Current, Source or Sink   1 A
Peak PWM OUT Current, Source or Sink   1 A
PFC OUT, PWM OUT Energy Per Cycle   1.5 µJ
Junction Temperature   150 °C
Storage Temperature Range -65° 150 °C
Lead Temperature (Soldering, 10 sec)   260 °C
Thermal Resistance (JA)
Plastic DIP
Plastic SOIC		   110
160		 °C/W
°C/W



Description

The FAN4803 is a space-saving controller for power factor corrected, switched mode power supplies that offers very low start-up and operating currents.

Power Factor Correction (PFC) offers the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply fully compli-ant to IEC1000-3-2 specifications. The FAN4803 includes circuits for the implementation of a leading edge, average  current "boost" type PFC and a trailing edge, PWM.

The FAN4803-1's PFC and PWM operate at the same frequency, 67kHz.  The PFC frequency of the FAN4803-2 is automatically set at half that of the 134kHz PWM.  This higher frequency allows the user to design with smaller PWM components while maintaining the optimum operating frequency for the PFC. An overvoltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting for enhanced system reliability.




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