ML4803

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. : 004422085 Detail

ML4803: 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...

floor Price/Ceiling Price

Part Number:
ML4803
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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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 VCC OVP with PFC Soft Start



Pinout

  Connection Diagram


Specifications

Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.

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 ML4803 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 compliant to IEC1000-3-2 specifications. The ML4803 includes circuits for the implementation of a leading edge, average current "boost" type PFC and a trailing edge, PWM.

The ML4803-1's PFC and PWM operate at the same frequency, 67kHz. The PFC frequency of the ML4803-2 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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