KA3882 Application Note

●Description

●The KA3882E/KA3883E is a fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include a UVLO, a low start-up current circuit, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and the high current

●totem-pole output for driving a POWER MOSFET. Also the KA3882E/KA3883E provides low start-up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3882E has UVLO threshold of 16V(on) and 10V(off). The KA3883E is 8.4V(on) and 7.6V(off). The KA3882E and

●KA3883E can operate within 100% duty cycle.

●Features

●• Low start current 0.2mA (typ)

●• Operating range up to 500kHz

●• Cycle by cycle current limiting

●• Under voltage lock out with hysteresis

●• Short shutdown delay time: typ.100ns

●• High current totem-pole output

●• Output swing limiting: 22V