KA3842A Datasheet – SMPS Controller – Fairchild

Part Number : KA3842A

Function : SMPS CONTROLLER

Manufacturers : Fairchild Semiconductor

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KA3842A datasheet

Obsolete as of 14-Sep-2013

Description :

The KA3842A / KA3842AC / KA3842AE are fixed PWM controller for 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 totem pole output for driving a POWER MOSFET. Also KA3842AC / KA3842AE provides low start up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3842AC / KA3842AE has UVLO threshold of 16V(on) and 10V(off). The KA3842AC/KA3842AE can operate within 100% duty cycle.

 

KA3842A pinout diagram

Features

1. Low Start Current 0.2mA (Typ)
2. Operating Range up to 500kHz
3. Cycle by Cycle Current Limiting
4. Under Voltage Lock Out With Hysteresis
5. Short Shutdown Delay Time: Typ.100ns
6. High Current Totem-Pole Output
7. Output Swing Limiting: 22V

 

KA3842A Datasheet

KA3842A pdf

 

Other data sheets within the file : KA3842AC, KA3842AE