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ML4800IS, ML4800ISX, ML4801

Table of contents:
Info of ML4800IS
Info of ML4800ISX
Info of ML4801

ML4800IS, ML4800ISX, ML4801 Selling Leads, Datasheet

MFG:Fairchild Semiconductor Category:Integrated Circuits (ICs) Package Cooled:SOP16 D/C:06+

ML4800IS, ML4800ISX, ML4801 Datasheet download

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Part Number: ML4800IS

Category: Integrated Circuits (ICs)

MFG: Fairchild Semiconductor

Package Cooled: SOP16

D/C: 06+

Description: IC PFC PWM CTRLR COMBO 16-SOIC

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ML4800IS Parameters

Technical/Catalog Information	ML4800IS
Vendor	Fairchild Semiconductor
Category	Integrated Circuits (ICs)
Packaging	Tube
Package / Case	16-SOIC (3.9mm Width)
Voltage - Supply	11 V ~ 16.5 V
Mode	Average Current
Frequency - Switching	76kHz
Current - Startup	200A
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	ML4800IS ML4800IS

ML4800ISX Parameters

Technical/Catalog Information	ML4800ISX
Vendor	Fairchild Semiconductor
Category	Integrated Circuits (ICs)
Packaging	Tube
Package / Case	16-SOIC (3.9mm Width)
Voltage - Supply	11 V ~ 16.5 V
Mode	Average Current
Frequency - Switching	76kHz
Current - Startup	200A
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	ML4800ISX ML4800ISX

ML4801 General Description

The ML4801 is a controller for power factor corrected, switched mode power supplies. Key features of this combined PFC and PWM controller are low start-up and operating currents. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC1000-2-3 specifications. The ML4801 includes circuits for the implementation of a leading edge, average current "boost" type power factor correction and a trailing edge pulse width modulator (PWM).

The PFC frequency of the ML4801 is automatically set at half that of the PWM frequency generated by the internal oscillator. This technique allows the user to design with smaller output 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 and input voltage brownout protection.

ML4801 Maximum Ratings

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.

VCC ............................................................................................... 18V
ISENSE Voltage .................................................. -3V to 5V
Voltage on Any Other Pin ...... GND - 0.3V to VCC + 0.3V
IREF ............................................................................................20mA
IAC Input Current .................................................... 10mA
Peak PFC OUT Current, Source or Sink ................ 500mA
Peak PWM OUT Current, Source or Sink .............. 500mA
PFC OUT, PWM OUT Energy Per Cycle .................. 1.5J
Junction Temperature .............................................. 150°C
Storage Temperature Range ..................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) ..................... 260°C
Thermal Resistance (qJA)
Plastic DIP ....................................................... 80°C/W
Plastic SOIC .................................................. 105°C/W

ML4801 Features

`Internally synchronized PFC and PWM in one IC
`Low start-up current (200A typ.)
`Low operating current (5.5mA typ.)
`Low total harmonic distortion
`Reduces ripple current in the storage capacitor between the PFC and PWM sections
`Average current continuous boost leading edge PFC
`High efficiency trailing edge PWM optimized for current mode operation
`Current fed gain modulator for improved noise immunity
`Brown-out control, overvoltage protection, UVLO, and soft start

ML4801 Connection Diagram

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