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UC3842B - CONTROLLERS

Description

The UTC UC3842B/3843B are specifically designed for off-line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components.

The UC3842B has UVLO thresholds 16V (on) and 10V(off), ideally suited for off-line converters.

Features

  • S.
  • Trimmed oscillator for precise frequency control.
  • Oscillator frequency guaranteed at 250kHz.
  • Current mode operation to 500kHz.
  • Automatic feed forward compensation.
  • Latching PWM for cycle-by-cycle current limiting.
  • Internally trimmed reference with undervoltage lockout.
  • High current totem pole output.
  • Undervoltage lockout with hysteresis.
  • Low startup and operating current.

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UC3842A CURRENT MODE PWM CONTROLLER
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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.

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UNISONIC TECHNOLOGIES CO., LTD UC3842B/3843B LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE CURRENT MODE CONTROLLERS  DESCRIPTION The UTC UC3842B/3843B are specifically designed for off-line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. The UC3842B has UVLO thresholds 16V (on) and 10V(off), ideally suited for off-line converters. The UC3843B is tailored for lower voltage applications having UVLO thresholds of 8.4V(on) and 7.6V(off).
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