FAN7527BMX

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This literature is subject to all applicable copyright laws and is not for resale in any manner. FAN7527B Power Factor Correction Controller Features Description   Internal Startup Timer         Precise Adjustable Output Over-Voltage Protection Internal R/C Filter Eliminates the Need for External R/C Filter Zero Current Detector One Quadrant Multiplier Trimmed 1.5% Internal Band Gap Reference Under-Voltage Lockout with 3 V of Hysteresis The FAN7527B provides simple and high-performance active Power Factor Correction (PFC). The FAN7527B is optimized for electronic ballasts and low–power, highdensity power supplies that require minimum 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. Totem-Pole Output with High-State Clamp Low Startup and Operating Current 8-Pin SOP or 8-Pin DIP Applications   Electronic Ballast SMPS Ordering Information Part Number Operating Temperature Range Package Packing Method FAN7527BMX -25 to +125°C 8-Lead, Small Outline Package (SOP) Tape and Reel FAN7527BN -25 to +125°C 8-Lead, Dual Inline Package (DIP) Tube © 2003 Fairchild Semiconductor Corporation FAN7527B • Rev. 1.0.3 www.fairchildsemi.com FAN7527B — Power Factor Correction Controller April 2013 FAN7527B — Power Factor Correction Controller Block Diagram Figure 1. © 2003 Fairchild Semiconductor Corporation FAN7527B • Rev. 1.0.3 Block Diagram www.fairchildsemi.com 2 FAN7527B — Power Factor Correction Controller Pin Configuration Figure 2. Pin Configuration Pin Definitions Pin # Name Description 1 INV 2 EA_OUT 3 MULT 4 CS Input of the PWM comparator. The MOSFET current is sensed by a resistor and the resulting voltage is applied to this pin. An internal R/C filter is included to reject high-frequency noise. 5 Idet Zero Current Detection (ZCD) input. 6 GND Ground 7 OUT Gate driver output. Push-pull output stage is able to drive the power MOSFET with a peak current of 500 mA. 8 VCC Supply voltage of driver and control circuits. Inverting input of the error amplifier. The output of the boost converter should be resistively divided to 2.5 V and connected to this pin. Output of the error amplifier. Feedback compensation network is placed between this pin and the INV pin. Input to the multiplier stage. The full-wave rectified AC voltage is divided to less than 2 V and is connected to this pin. © 2003 Fairchild Semiconductor Corporation FAN7527B • Rev. 1.0.3 www.fairchildsemi.com 3 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VCC Parameter Min. Supply Voltage Max. Unit 30 V IOH, IOL Peak Drive Output Current ±500 mA ICLAMP Driver Output Clamping Diodes VO > VCC or VO