KA3842A

By datasheet - April 3rd, 2008

KA3842AC/KA3842AE SMPS Controller

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KA3842AC/KA3842AE SMPS Controller

March 2006

KA3842AC/KA3842AE SMPS Controller
Features
Low start current 0.2mA (Typ.) Operating range up to 500kHz Cycle by cycle current limiting Under Voltage Lock Out (UVLO) with hysteresis Short shutdown delay time: Typ.100ns High current totem-pole output Output swing limiting: 22V

Description
The KA3842AC/KA3842AE are fixed PWM controllers for Off Line and DC to DC converter applications. The internal circuits include UVLO, low start up current, temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output for driving a POWER MOSFET. Also KA3842AC/KA3842AE provides low start up current below 0.3mA and short shutdown delay time, typically 100ns. The KA3842AC/KA3842AE has a UVLO threshold of 16V(on) and 10V(off). The KA3842AC/KA3842AE can operate within a 100% duty cycle.

8-DIP

Ordering Information
Part Number
KA3842AC KA3842AE

Operating Temp. Range
-0 to 70 C

Pb-Free
Yes

Package
8-DIP

Packing Method
Tube

2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

KA3842AC/KA3842AE Rev. 1.0.1