DESCRIPTION
HF81 is an innovative two-terminal IC that automatically discharges an X capacitor while eliminating power losses and allowing power supplies to comply with safety standards.

FEATURES
● Disconnect series discharge resistors from
   L-N when AC voltage is applied
● Connect series discharge resistors with L-N
   to discharge the X capacitor when AC
   voltage is unplugged
● Supplied by AC voltage directly and doesn’t
   need external bias
● Meets safety standards for use before or
   after input fuse
● No external ground pin leads to high
   common mode surge immunity
● 1000V internal JFET inside leads to high
   differential surge immunity
● >4mm creepage on package and PCB

APPLICATIONS
● AC/DC converters with X capacitors larger
   than 0.1μF
● All converters requiring ultra-low no-load
   consumption and low standby power
● Appliances requiring EuP Lot 6 compliance
● Appliances requiring Energy Star V2.0
● White Goods (For example, Dishwasher,
   Washing Machine, Air-Conditioner and etc.)
● Server Power, Telecom Power, ATX Power