This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Class V, radiation hardened current-mode PWM controller


Models (4)

Title Category Type Date
UC1843A-SP TINA-TI Transient Spice Model TINA-TI Spice Model ZIP 10 Jan 2019
UC1843A-SP TINA-TI Transient Reference Design TINA-TI Reference Design TSC 10 Jan 2019
UC1843A-SP PSpice Transient Model PSpice Model ZIP 09 Oct 2018
UC1843A-SP Unencrypted PSpice Transient Model PSpice Model ZIP 09 Oct 2018

Design kits & evaluation modules (1)

Name Part# Type
UC1843B-SP current mode PWM controller evaluation module UC1843BEVM-CVAL Evaluation Modules & Boards

Reference designs

20- to 40-VIN, 50-W Space-grade isolated flyback DC/DC over-current protection reference design

Spacecraft bus voltages vary from the well-established 28-V to more than the 100-V typically used in highpower commercial communications satellites, this reference design shows an example for a space-grade 50-W isolated intermediary bus converter, while implementing over-current protection (OCP (...)

View the Important Notice for reference designs covering authorized use, intellectual property matters and disclaimers.

Software (1)

UC1843B-SP Flyback Converter Calculator (Rev. B)  (ZIP 396 KB )    11 Mar 2020  

CAD/CAE symbols

Part# Package | Pins CAD File (.bxl) STEP Model (.stp)
UC1843B-SP Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Please follow the instructions below to view the CAD symbols:

Step 1: Download and install the Ultra Librarian software

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Step 3: Open the .bxl file with the Ultra Librarian software.

You can always access the complete CAD/CAE Symbols database at //webench.ti.com/cad/

Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a free download.

The UL Reader is a subset of the Ultra Librarian toolset that can generate, import, and export components and their attributes in virtually any EDA CAD/CAE format.