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UC3843A - CURRENT MODE PWM CONTROLLER

Download the UC3843A datasheet PDF. This datasheet also covers the UC3842A variant, as both devices belong to the same current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC3842A-UTC.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Unisonic Technologies

Part Number Description
UC3843A CURRENT MODE PWM CONTROL CIRCUITS
UC3843A-Q PWM CONTROLLER
UC3843B CONTROLLERS
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 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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