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UC3843B - CONTROLLERS

Download the UC3843B datasheet PDF. This datasheet also covers the UC3842B variant, as both devices belong to the same controllers family and are provided as variant models within a single manufacturer datasheet.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC3842B_UTC.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

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UC3843B HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER ST Microelectronics
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UC3843B HIGH-PERFORMANCE CONTROLLER ON Semiconductor
UC3843B Controllers American First Semiconductor
UC3843B High Performance Current Mode Controller HOTCHIP

Other Datasheets by Unisonic Technologies

Part Number Description
UC3843A CURRENT MODE PWM CONTROLLER
UC3843A CURRENT MODE PWM CONTROL CIRCUITS
UC3843A-Q PWM CONTROLLER
UC3842A CURRENT MODE PWM CONTROLLER
UC3842A CURRENT MODE PWM CONTROL CIRCUITS

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
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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