R2A20113DD Datasheet | Renesas

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 REJ03F0279-0100 Rev.1.00 Oct 10, 2008 Page 1 of 6 R2A20113DD/SP .. Pin Arrangement FB P RT VREF 1 2 3 4 8 7 6 5 VCC OUT GND CS (Top view) Pin Functions Pin No. 1 2 3 4 5 6 7 8 Pin Name FB P RT VREF CS GND OUT VCC Input/Output Input Output Input/Output Output Input - Output Input Function Error amplifier input terminal Error amplifier output terminal A resistor connection terminal for RAMP current setting Reference voltage output terminal Zero current detection and overcurrent detection input terminal Ground Power MOSFET drive terminal Supply voltage terminal REJ03F0279-0100 Rev.1.00 Oct 10, 2008 Page 2 of 6 R2A20113DD/SP .. Block Diagram VREF 4 VREF: 5V UVLO ON: 12V OFF: 9.2V 8 VCC 27.5V Zero Current Detector Delay 7 OUT Restart GD Disable 40k CS 5 5p OCP P - + 6 GND -...