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).

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