Critical Conduction Mode Interleave PFC Control IC

Equipped with a variety of functions for improving efficiency, driving higher efficiency and eco-friendliness for power supply systems of electric devices, and thus society as a whole. Driver ICs are also available for high-accuracy, high-efficiency LED lighting systems.

Product Status: Mass Production(*)


The R2A20132SP controls two boost converters to provide a active power factor correction.
The R2A20132SP is based on R2A20112 and additional functions are Slave drop function at light load, Off time control, Brownout, Double OVP, Dynamic under voltage protection, and ZCD signal open detection.
Also the reference voltage tolerance is improved.
The R2A20132SP adopts critical conduction mode for power factor correction and realizes high efficiency and a low switching noise by zero current switching.
Interleaving function improve ripple current on input or output capacitor by 180 degrees phase shift.
The feedback loop open detection, over current protection are built in the R2A20132SP, and can constitute a power supply system of high reliability with few external parts.


    • Maximum ratings
      Supply voltage Vcc: 24 V
      Junction temperature Tj: –40 to +150°C
    • Electrical characteristics
      VREF output voltage VREF: 5.0 V ± 1.5%
      UVLO operation start voltage Vuvlh: 10.5 V ± 0.7 V
      UVLO operation shutdown voltage Vuvll: 9.3 V ± 0.5 V
      UVLO hysteresis voltage Hysuvl: 1.2 V ± 0.5 V
    • Functions
      Boost converter control with critical conduction mode
      Interleaving control with slave drop (SD) function at light load
      Off time control (OTC) function: Switching loss is decreased at light load.
      Brownout function
      Double OVP: Two line sense for over voltage protection
      Dynamic under voltage protection (DUVP): Sense for under voltage protection
      AC Hi voltage detection (ACDET)
      Feedback loop open detection
      ZCD signal open detection
      Master and Slave independenced over current protection
      140 μs restart timer
      Package lineup: Pb-free SOP-20


Basic Information
Mass Production(*)
Vin (V) 最大值


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