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
