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UC3842A - CURRENT MODE PWM CONTROLLER

Description

The UTC UC3842A/3843A are high performance fixed frequency current mode controllers that specifically designed for Off-Line and DC to DC converter applications with minimal external parts count.

The differences between UC3842A and UC3843A are the under-voltage lockout thresholds.

Features

  • S.
  • Operation output switching frequency up to 500 kHz.
  • Automatic feed forward compensation.
  • Latching PWM for cycle-by-cycle current limiting.
  • High current totem pole output.
  • Internally trimmed reference with under voltage lockout.
  • UVLO with hysteresis.
  • Low startup and operating current.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UC3842A/3843A LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS  DESCRIPTION The UTC UC3842A/3843A are high performance fixed frequency current mode controllers that specifically designed for Off-Line and DC to DC converter applications with minimal external parts count. The differences between UC3842A and UC3843A are the under-voltage lockout thresholds. The UC3842A ideally suited to off-line applications with UVLO thresholds of 16V(ON) and 10V(OFF), and UC3843A has UVLO thresholds of 8.4V(ON) and 7.6V(OFF) for lower voltage applications.
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