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UC1845A - Current-Mode PWM Controllers

Download the UC1845A datasheet PDF. This datasheet also covers the UC1842A variant, as both devices belong to the same current-mode pwm controllers family and are provided as variant models within a single manufacturer datasheet.

General Description

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family.

Key Features

  • Optimized for Off-Line and DC-DC Converters.
  • Low Start-Up Current (< 0.5 mA).
  • Trimmed Oscillator Discharge Current.
  • Automatic Feedforward Compensation.
  • Pulse-by-Pulse Current Limiting.
  • Enhanced Load Response Characteristics.
  • Undervoltage Lockout With Hysteresis.
  • Double Pulse Suppression.
  • High-Current Totem Pole Output.
  • Internally-Trimmed Bandgap Reference.
  • Up to 500-kHz Operation.
  • Create.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC1842A-etcTI.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
UC1845A Current Mode PWM Controller Unitrode
UC1845A CURRENT MODE PWM CONTROLLER LINFINITY
UC1840 PWM CONTROLLER STMicroelectronics
UC1841 Programmable Off-Line PWM Controller Unitrode
UC1842A Current Mode PWM Controller Unitrode

Other Datasheets by Texas Instruments

Part Number Description
UC1845A-EP Current-Mode PWM Controllers
UC1845A-SP Current-Mode PWM Controllers
UC1845 Current-Mode PWM Controllers
UC1845J Current-Mode PWM Controller
UC1845L 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
UC1842A, UC1843A, UC1844A, UC1845A UC2842A, UC2843A, UC2844A, UC2845A UC3842A, UC3843A, UC3844A, UC3845A SLUS224G – SEPTEMBER 1994 – REVISED JULY 2022 UCx84xA Current-Mode PWM Controller 1 Features • Optimized for Off-Line and DC-DC Converters • Low Start-Up Current (< 0.