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KA3842AE - SMPS Controller

Download the KA3842AE datasheet PDF. This datasheet also covers the KA3842AC variant, as both devices belong to the same smps controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The KA3842AC/KA3842AE are fixed PWM controllers for Off Line and DC to DC converter applications.

Key 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (KA3842AC_FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

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KA3842B SMPS Controller Fairchild
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Other Datasheets by Fairchild (now onsemi)

Part Number Description
KA3842AC SMPS Controller
KA3843AC SMPS Controller
KA3010D 15V 1.7W 4-channel motor driver
KA3032 5-Channel Motor Drive IC
KA3120 SPINDLE & VOICE COIL MOTOR ONE CHIP DRIVER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.