Description
The R2A20113 controls a boost converter to provide a active power factor correction. The R2A20113 adopts critical conduction mode for power factor correction and realizes high efficiency and a low switching noise by zero current switching. Because the zero current is detected by using the GND current, the ZCD Auxiliary winding is unnecessary. The feedback loop open detection, two mode overvoltage protection, overcurrent protection are built in the R2A20113, and can constitute a power supply system of high reliability with few external parts.

FEATUREs
• Absolute Maximum Ratings
  -Supply voltage Vcc: 24 V
  -Operating junction temperature Tjopr: –40 to +150°C
• Electrical characteristics
   -UVLO operation start voltage VH: 12 V ± 0.8 V
   -UVLO operation shutdown voltage VL: 9.2 V ± 0.7 V
   -UVLO hysteresis voltage Hysuvl: 2.8 V ± 0.7 V
• Functions
-Boost converter control with critical conduction mode
-Two mode overvoltage protection
   Mode1: Dynamic OVP corresponding to a voltage rise by load change
   Mode2: Static OVP corresponding to overvoltage in stable
-Feedback loop open detection
-Overcurrent protection
-Package lineup: Pb-free SOP-8 (JEDEC)/DILP-8