FAN6920MRMY屬于集成電路（IC）的PFC（功率因數(shù)校正）。由安森美半導(dǎo)體公司制造生產(chǎn)的FAN6920MRMYPFC（功率因數(shù)校正）功率因數(shù)校正 (PFC) 是用于調(diào)整交流電路中的電壓和電流之間的相位角，使之趨近于零的半導(dǎo)體器件。不同模式包括平均電流、邊界導(dǎo)通、連續(xù)導(dǎo)通、臨界導(dǎo)通、電流控制式頻率折返、不連續(xù)和不連續(xù)導(dǎo)通，開關(guān)頻率從 6 kHz 至 1.7 MHz 可調(diào)。

描述 Description

The highly integrated FAN6920MR combines Power Factor

Correction (PFC) controller and quasi?resonant PWM controller.

Integration provides cost?effective design and reduces external

components.

For PFC, FAN6920MR uses a controlled on?time technique to

provide a regulated DC output voltage and to perform natural

power?factor correction. With an innovative THD optimizer,

FAN6920MR can reduce input current distortion at zero?crossing

duration to improve THD performance.

For PWM, FAN6920MR provides several functions to enhance the

power system performance: valley detection, green?mode operation,

and high / low line over?power compensation. Protection functions

include secondary? side open?loop and over?current with

auto?recovery protection; external auto?recovery triggering;

adjustable over?temperature protection by the RT pin; and external

NTC resistor, internal over?temperature shutdown, VDD pin OVP, and

the DET pin over?voltage for output OVP, and brown?in / out for AC

input voltage UVP.

The FAN6920MR controller is available in a 16?pin small?outline

package (SOP).

特性 Features

? mWSaver Technology Provides Industry’s Best?in?Class Standby

Power

? Internal High?Voltage JFET Startup

? Adaptive Off?Time Modulation of tOFF?MIN for QR PWM Stage,

Improved Light?Load Efficiency

? PFC Burst or Shutdown at Light?Load Condition

? Optimized for Dual Switch Flyback Design to Achieve >90%

Efficiency While Meeting 2013 ErP Lot 6 Standby Power

Requirement

? Integrated PFC and Flyback Controller

? Critical?Mode PFC Controller

? Zero?Current Detection for PFC Stage

? Quasi?Resonant Operation for PWM Stage

? Internal 5 ms Soft?Start for PWM

? Brownout Protection

? High / Low Line Over?Power Compensation

? Auto?Recovery Over?Current Protection

? Auto?Recovery Open?Loop Protection

Features (continued)

? Externally Auto?Recovery Triggering (RT

Pin)

? Adjustable Over?Temperature Protection

? VDD Pin and Output Voltage OVP

(Auto?Recovery)

? Internal Over?Temperature Shutdown

(140°C)

? This is a Pb?Free Device

Applications

? AC/DC NB Adapters

? Open?Frame SMPS

? Battery Charger