Power Factor Correction Controller
FAN7527B
Description
The FAN7527B provides simple and high-performance active Power Factor Correction (PFC). The FAN7527B is optimized for electronic ballasts and low-power, high-density power supplies that require minimu m board size, reduced external components, and low power dissipation. Because the R/C filter is included in the current-sense block, an external R/C filter is not necessary. Special circuitry prevents no-load runaway conditions. Regardless of the supply voltage, the output drive clamping circuit limits the overshoot of the power MOSFET gate drive, which improves system reliability.
Features
--Internal Startup Timer
--Internal R/C Filter Eliminates the Need for External R/C Filter
--Precise Adjustable Output Over-Voltage Protection
--Zero Current Detector
--One Quadrant Multiplier
--Trimmed 1.5% Internal Band Gap Reference
--Under-Voltage Lockout with 3 V of Hysteresis
--Totem-Pole Output with High-State Clamp
--Low Startup and Operating Current
--8-Pin SOP or 8-Pin DIP
--These Devices are Pb-Free and are RoHS Compliant
Applications
--Electronic Ballast
--SMPS
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