ML4821 PDF Datasheet
Please enter the part number you wish to PDF download in the search bar.
Description
This is Power Factor Controller. www.fairchildsemi.com
ML4821
Power Factor Controller
Features
Average current sensing for lowest possible harmonic distortion Average line compensation with brown-out control Precision buffered 5V reference 1A peak current totem-pole output drive Overvoltage comparator eliminates output “runaway” due to load removal Wide common mode range in current sense comparators for better noise immunity Large oscillator amplitude for better noise immunity Output driver internally limited to 17V “Sleep mode” shutdown input
General Description
The ML4821 provides complete control for a “boost” type power factor correction system using the average current sensing method. Special care has been taken in the design of the ML4821 to increase system noise immunity. The circuit includes a precision reference, gain modulator, average current error ampli er, output error ampli er, over-voltage protection comparator, shutdown logic, as well as a high current output. In addition, start-up.