onsemi FAN6921BMRMY

The highly integrated FAN6921BMR combines Power Factor Correction (PFC) controller and Quasi−Resonant PWM controller. Integration provides cost effect design and allows for fewer external components. For PFC, FAN6921BMR 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, FAN6921BMR can reduce input current distortion at zero−crossing duration to improve THD performance. For PWM, FAN6921BMR provides several functions to enhance the power system performance: valley detection, green−mode operation, high / low line over power compensation. FAN6921BMR provides many protection functions as well: secondary−side open−loop and over−current with auto recovery protection, external latch triggering, adjustable over−temperature protection by RT pin and external NTC resistor, internal over−temperature shutdown, VDD pin OVP, and DET pin over −voltage for output OVP, and brown−in / out for AC input voltage UVP. The FAN6921BMR controller is available in a 16−pin small outline package (SOP).

• Integrated PFC and Flyback Controller
• Critical Mode PFC Controller
• Zero−Current Detection for PFC Stage
• Quasi−Resonant Operation for PWM Stage
• Internal Minimum tOFF 8 μs for QR PWM Stage
• Internal 10 ms Soft−Start for PWM
• Brownout Protection
• High / Low Line Over−Power Compensation
• Auto−Recovery Over−Current Protection
• Auto−Recovery Open−Loop Protection
• Externally Latch Triggering (RT Pin)
• Adjustable Over−Temperature Latched (RT Pin)
• VDD Pin and Output Voltage OVP (Latched)
• Internal Over−Temperature Shutdown (140°C)
• This is a Pb−Free Device

• AC/DC NB Adapters
• Open−Frame SMPS
• Battery Charger