KA3882D Datasheet PDF - Fairchild

CURRENT MODE PWM CONTROLLER

●The KA3882/3/4/5 are fixed PWM controllerfor Off-Line and DC to DC converter applications. The internal circuits include UVLO, low start up current circuit, temperature compensated reference,

●high gain error amplifier, current sensing comparator, and high current totempole output for driving a POWER MOSFET. Also KA3882/3/4/5 provide low start up current below 0.3mA and short

●shutdown delay time typ. 100ns. The KA3882 and KA3884 have UVLO threshold of 1 6V(on) and

●10V(off).

●The KA3883 and KA3885 are 8.4V(on) and 7.6V(off).

●The KA3882 and KA3883 can operate within 100% duty cycle.

●The KA3884 and KA3885 within 50% by using T Flip-Flop.

●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 Totempole Output

●•  Output Swing Limiting: 22V