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UC1843B-D - HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Download the UC1843B-D datasheet PDF. This datasheet also covers the UC1842B-D variant, as both devices belong to the same high performance current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The UTC UC1842B-D/1843B-D 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 UC1842B-D and UC1843B-D are the under-voltage lockout thresholds.

Key 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 (UC1842B-D-UTC.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
UC1843B-SP PWM Controller Texas Instruments
UC1843 Current-Mode PWM Controllers Texas Instruments
UC1843-HIREL current-mode PWM controller Texas Instruments
UC1843-SP current-mode PWM controller Texas Instruments
UC1843A Current Mode PWM Controller Unitrode

Other Datasheets by Unisonic Technologies

Part Number Description
UC1842B-D HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

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 UC1842B/43B-D HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS LINEAR INTEGRATED CIRCUIT  DESCRIPTION The UTC UC1842B-D/1843B-D 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 UC1842B-D and UC1843B-D are the under-voltage lockout thresholds. The UC1842B-D ideally suited to off-line applications with UVLO thresholds of 16V(ON) and 10V(OFF), and UC1843B-D has UVLO thresholds of 8.4V(ON) and 7.6V(OFF) for lower voltage applications.