Features

l  Low Startup Current

l  Low Quiescent Current

l  Under-Voltage Lockout with Hysteresis

l  Zero  Current  Detector for  Critical  Conduction Mode

l  Dynamic   and    Static    Output    Over-Voltage Protection

l  Gate Output Maximum Voltage Clamped

l  Internal Restart Timer

l  1% Internal Reference Voltage

l  Internal Leading-Edge Blanking

l  +/-500mA Totem Pole Output with Active Shut Down

Applications

l  Power Supply PFC Pre-Regulator

l  LED Lighting Application

l  Desktop PC

l  Electronics Ballast for Fluorescent Lamp

Description

The  GR8762  is  a  current-mode  PFC  controller operating    in    critical     conduction    mode.    The sinusoidal current is taken from the single phase line supply and stabilized DC voltage is available at the output.  The   IC  includes  a  highly  liner  multiplier which can reduce AC  input current distortion, that allows    wide-range-mains     operation     with     an extremely low THD, even over a large load range.     The output voltage is controlled by an error amplifier and  an   internal  voltage   reference.  An   effective two-step (dynamic and static) OVP enables to safely handle over voltages either occurring at start-up or resulting from  load  disconnection.  The  totem-pole output stage capable of  ±500mA driving capability is suitable for big MOSFET or IGBT. It is available in both 8-pin DIP and 8-pin SOP package.

LED Lighting Application