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UC3943 - HIGH PERFORMANCE CURRENT MODE CONTROLLERS

General Description

The UTC UC3943 is specifically designed for off-line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components.

The UTC UC3943 has UVLO thresholds 8.4V (on) and 7.6V(off), ideally suited for off-line converters.

Key Features

  • S.
  • With burstmode for lower standby power.
  • With greenmode for higher light load efficiency.
  • Oscillator frequency guaranteed at 250kHz.
  • 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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Full PDF Text Transcription (Reference)

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UNISONIC TECHNOLOGIES CO., LTD UC3943 LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE CURRENT MODE CONTROLLERS  DESCRIPTION The UTC UC3943 is specifically designed for off-line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. The UTC UC3943 has UVLO thresholds 8.4V (on) and 7.6V(off), ideally suited for off-line converters.