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ML48011S, ML4801ISX, ML4802

Table of contents:
Info of ML48011S
Info of ML4801ISX
Info of ML4802

ML48011S, ML4801ISX, ML4802 Selling Leads, Datasheet

MFG:ML Package Cooled:SOP16 D/C:01+

ML48011S, ML4801ISX, ML4802 Datasheet download

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Part Number: ML48011S

MFG: ML

Package Cooled: SOP16

D/C: 01+

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ML4802 General Description

The ML 4802 is a controller for power factor corrected, switched mode power supplies that offers Green Mode operation and reduced start-up and operating currents. Green Mode is an efficiency improving circuit feature which operates automatically in low power situations. This feature helps meet the demands of Energy Star™ programs.

Power Factor Correction (PFC) offers the use of lower cost bulk capacitors, reduces power line loading and stress on the switching FETs. The ML4802 includes circuits for the implementation of a leading edge, average current, "boost" type power factor corrector and a trailing edge Pulse Width Modulator (PWM).

The PFC frequency of the ML4802 is automatically synchronized to be one half that of the PWM. This technique allows the user to design with smaller PWM components while maintaining the optimum operating frequency for the PFC. An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and brown-out protection.

ML4802 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
PeakCurrent, Source or Sink
PFC OUT, PWM OUT ....................................... 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

ML4802 Features

`Internally synchronized PFC and PWM in one IC
`Green Mode maximizes efficiency during low power standby operation
`Low supply current (Start-up 200A typ., operating 5.5mA typ.)
`Average current continuous boost leading edge PFC
`High efficiency trailing edge PWM can be configured for current mode operation
`Reduced ripple current in the storage capacitor between the PFC and PWM sections
`PFC overvoltage comparator eliminates output "runaway" due to load removal
`Current fed gain modulator for improved noise immunity
`Overvoltage protection, UVLO, and soft start

ML4802 Connection Diagram

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