KA7526DTF ,Power Factor Correction (PFC) ControllerApplications8-DIP• Electronic ballast•SMPS18-SOP1Rev. 1.0.12003 Fairchild Semiconductor Corporation ..
KA7526DTF ,Power Factor Correction (PFC) ControllerFeatures Descriptions• Internal startup timer The KA7526 provides simple and high performance activ ..
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KA7526D-KA7526DTF
Power Factor Correction (PFC) Controller
Features Internal startup timer Internal R/C filter which eliminates the need for an
external R/C filter Overvoltage comparator eliminates runaway output
voltage Zero current detector One quadrant multiplier Trimmed 1.5% internal bandgap reference Under voltage lock out with 5V of hysteresis Totem pole output with high state clamp Low startup and operating current 8-Pin DIP or 8-Pin SOP
Applications Electronic ballast
•SMPS
DescriptionsThe KA7526 provides simple and high performance active
power factor correction. KA7526 is optimized for electronic
ballast and low power, high density power supplies requiring
a minimum board area, reduced component count and low
power dissipation. Addition of internal R/C filter eliminates
the need for an external R/C filter. Internal clamping of the
error amplifier and multiplier outputs improves turn on
overshoot characteristics and current limiting. Special
circuitry has also been added to prevent no load runaway
conditions. The output drive clamping circuit limits
overshoot of the power MOSFET gate drive independent of
supply voltage, so that it greatly enhance the system
reliability.
