Fairchild's PFC Solutions Lower Costs, Reduce Power Loss

Lower system costs. Reduced power loss. Lower electrical bills. These are just a few of the benefits of using Fairchild's broad line of power factor correction (PFC) products. Fairchild's industry-leading PFC products also meet the stringent requirements of IEC 6000.3.2.

Living on the Edge: PFC/PWM Combo Controllers Increase Efficiency
Unlike the competition, Fairchild's PFC/PWM controllers combine leading edge PFC and trailing edge PWM in one IC. Benefits of this combination include:

Fairchild's PFC Solutions

Ballast	Low-power Power Supplies < 200W	PC Power Supply 200-400W	Plasma Displays > 400W	Servers > 500W
FAN7527B	FAN4803-1 FAN4803-2 FAN7527B	FAN4810 FAN4803-1 FAN4803-2 ML4800 ML4812 ML4821 ML4824-1 ML4824-2 ML4826 ML4841	FAN4810 FAN4822 ML4800 ML4821 ML4824-1 ML4824-2 ML4826 ML4841	FAN4810 FAN4822 ML4800 ML4821 ML4824-1 ML4824-2 ML4826 ML4841

Select the Best Solution with Fairchild's PFC Design Tools
Fairchild's new interactive PFC design tools help power supply designers calculate and select major power components for PFC applications and control components providing optimal function for PFC converters. These tools also highlight the advantages and disadvantages of different power factor correction (PFC) topologies and related circuitries. Learn more about these design tools and download them for free at www.fairchildsemi.com/products/analog/pfctools.html.

Get More Information
For more information on power factor correction circuits and Fairchild's PFC products, please refer to the following Application Notes:

AC/DC SMPS Applications

PFC Controller
FAN4810 •   TriFault Detect™ for UL1950 compliance and enhanced safety •   Slew rate enhanced transconductance error amplifier for ultra-fast PFC response •   Low power: 200µA startup current, 5.5mA operating current •   Low total harmonic distortion, high PF •   Average current, continuous boost leading edge PFC •   Current fed gain modulator for improved noise immunity •   Overvoltage and brown-out protection, UVLO, and soft start •   Synchronized clock output Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
PFC/PWM Combo Controller
FAN4803-1/FAN4803-2 •   Synchronized PFC leading and PWM trailing edge modulation in one 8-pin IC •   Patented one-pin voltage error amplifier with advanced input current shaping technique •   Low supply currents; start-up: 150µA. operating: 2mA •   Reduced ripple current in the storage capacitor between the PFC and PWM sections Applications: •   Low-power Power Supplies •   PC Power Supply	[top]
Zero Voltage Switch PFC for High Power Applications
FAN4822 •   Built-in ZVS switch control with fast response for high efficiency at high power levels •   Reduced stress of boost diode and switch •   Reduced EMI due to softer switching •   Simple solution for implementation of PFC in high power applications Applications: •   Plasma Displays •   Servers	[top]
PFC/PWM Combo Controller
ML4824-1/ML4824-2 •   Internally synchronized PFC and PWM in one IC •   ML4824-2 doubles the switching frequency of the PWM •   Reduces ripple current in the storage capacitor between the PFC and PWM sections •   Average current, continuous boost leading edge PFC •   High efficiency trailing edge PWM can be configured for current mode or voltage mode operation •   Average line voltage compensation with brownout control Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
PFC/PWM Combo Controller with TriFault Detect™
ML4800 •   TriFault detect™ complies with UL1950 and ensures that no unsafe conditions result from single component failure in the PFC •   Internally synchronized leading-edge PFC and trailing-edge PWM in one IC •   Slew rate enhanced transconductance error amplifier for ultra-fast PFC response •   Low power: 200µA startup current, 5.5mA operating current •   Reduced ripple current in storage capacitor between PFC and PWM sections •   PWM configurable for current-mode or voltage mode operation Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
Complete Control for "Boost" Type PFC Systems
ML4821 •   Provides complete control for a "boost" type PFC system using the average current sensing method •   Average line compensation with brownout control •   Precision buffered 5V reference •   1A peak current totem-pole output drive •   Output driver internally limited to 17V •   "Sleep mode" shutdown input Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
Current Mode Regulator with Increased Noise Immunity
ML4812 •   Precision buffered 5V reference (± 0.5%) •   Current-input gain modulator reduces external components and improved noise immunity •   Programmable ramp compensation circuit, peak current mode control •   1A peak current totem-pole output drive •   Large oscillator amplitude for better noise immunity Applications: •   PC Power Supply	[top]
PFC/PWM Combo Controller
ML4826 •   Internally synchronized PFC and PWM in one IC •   Low ripple current in the storage capacitor between the PFC and PWM sections •   Average current, continuous boost, leading edge PFC •   High efficiency trailing edge PWM with dual totem-pole outputs •   Average line voltage compensation with brown-out control •   PFC overvoltage comparator eliminates output "runaway" due to load removal •   Overvoltage protection, UVLO, and soft start Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
PFC/PWM Combo Controller
ML4841 •   Internally synchronized PFC and PWM in one IC •   Low ripple current in the storage capacitor between the PFC and PWM sections •   Average current, continuous boost, leading edge PFC •   High efficiency trailing edge PWM can be configured for current mode or voltage mode operation •   Average line voltage compensation with brown-out control •   Current-fed multiplier for improved noise immunity •   Overvoltage protection, UVLO, and soft start Applications: •   PC Power Supply •   Plasma Displays •   Servers	[top]
PFC Controller
FAN7527B •   Internal start-up timer •   Internal R/C filter eliminates the need for an external R/C filter •   Very precise adjustable output overvoltage protection •   Zero curent detector •   One quadrant multiplier •   Trimmed 1.5% internal bandgap reference •   Undervoltage lockout with 3V of hysteresis •   Totem pole output with high state clamp •   Low start-up and operating current •   8-pin DIP or 8-pin SOP Applications: •   Electronic Ballast •   SMPS	[top]