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UC1845W - Current-Mode PWM Controller

Download the UC1845W datasheet PDF. This datasheet also covers the UC1842 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 UCx84x series of control integrated circuits provide the

Features

  • Optimized for off-line and DC-to-DC converters.
  • Low start-up current (< 1 mA).
  • 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.
  • Error amplifier with low output resistance 2 Applicat.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC1842-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
UC1845 Current-Mode PWM Controllers
UC1845A Current-Mode PWM Controllers
UC1845A-EP Current-Mode PWM Controllers
UC1845A-SP Current-Mode PWM Controllers
UC1845J 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
UC1842, UC2842, UC3842, UC1843, UC2843, UC3843 UC1844, UC2844, UC3844, UC1845, UC2845, UC3845 SLUS223G – APRIL 1997 – REVISED JULY 2022 UCx84x Current-Mode PWM Controllers 1 Features • Optimized for off-line and DC-to-DC converters • Low start-up current (< 1 mA) • 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 • Error amplifier with low output resistance 2 Applications • Switching regulators of any polarity • Transformer-coupled DC-DC converters 3 Description The UCx84x series of control integrated circuits provide the features that are necessary to implement off-l
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