Power Factor Correction ICs


  • Status:Available

The FA1A61N is a control IC for configuring a critical-mode power factor correction converter. It achieves low power consumption by using a high-voltage CMOS process. It also has a frequency reduction function and redundant overvoltage protection function. In addition, it has a built-in state setting function using an external signal, and when combined with our current resonance IC FA6B21N, it improves power supply efficiency and optimizes operation in accordance with input voltage.


  • Capable of switching between burst operation and normal operation by an external signal (in conjunction with FA6B21N) to improve power supply efficiency under light loads
  • Optimizes operation in accordance with input voltage and improves input current distortion over a wide input range by operating in conjunction with the FA6B21N
  • Capable of low standby power by disabling input voltage detection
  • High-precision current detection: 0.6 V ± 2%
  • Improves efficiency under light loads using a frequency reduction function
  • Reduces noise using an overshoot reduction function and dynamic OVP circuit
  • Achieves low power consumption by using a high-voltage CMOS process
    1. Startup of 250 μA (typ), 0.8 mA (typ) during operation
  • Capable of directly driving power MOSFET, output peak current: source 0.5 A/sink 1 A
  • Prevents overvoltage and protects the output electrolytic capacitor using a redundant overvoltage protection circuit, even when an abnormality occurs in the output voltage detection line.
  • Built-in low voltage malfunction prevention circuit (12.5 V ON/7.5 V OFF)
  • Built-in restart timer
  • Package: SOP-8


  • Switching Power Supplies


Controller type CRM PFC
Applied circuit Detail PFC (Boost))
Frequency Selfoscillation
VCC(V) 10 to 26
OVP pin Detail With
Overload operation No (with overcurrent protection)
Overvoltage operation Auto-Recovery (FB)
Package SOP-8

Documentation Tools

Design tools PFC board design tool
Selection Guide Power Supply Control IC Selection Guide



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