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UC1843A-DIE

ACTIVE

Radiation-tolerant, Space-Grade Die, 30V input, 1A single-output 500kHz PWM controller

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Data sheet

UC1843A-DIE

ACTIVE
Data sheet Order now

Product details

Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
DIESALE (TD) — See data sheet
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • Optimized for Offline and DC-to-DC Converters
  • Low Start-Up Current
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward 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
  • Low RO Error Amplifier

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • Optimized for Offline and DC-to-DC Converters
  • Low Start-Up Current
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward 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
  • Low RO Error Amplifier

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

The UC1843A-DIE is a pin for pin compatible improved version of the UC1843-DIE. Providing the necessary features to control current-mode switched-mode power supplies.

The UC1843A-DIE is a pin for pin compatible improved version of the UC1843-DIE. Providing the necessary features to control current-mode switched-mode power supplies.
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Existing projects using this product have limited design support from TI. If available, you will find relevant collateral, tools and software on this page. Existing designs using this product have limited design support from TI. Request limited design support in the TI E2E™ support forums.

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet Current-Mode PWM Controller, UC1843A-DIE datasheet Jul 30, 2013
Selection guide TI Space Products (Rev. L) Mar 27, 2026
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML Dec 14, 2020
E-book Radiation Handbook for Electronics (Rev. A) May 21, 2019
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers Feb 7, 2002
Application note DN-65 Considerations in Powering BiCMOS ICs Sep 5, 1999
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences Sep 5, 1999
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit Sep 5, 1999
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty Sep 5, 1999
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection Sep 5, 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies Sep 5, 1999
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control Sep 5, 1999
Application note Modeling, Analysis and Compensation of the Current-Mode Converter Sep 5, 1999
Application note DN-30 Programmable Electronic Circuit Breaker Sep 5, 1999
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers Sep 5, 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode Sep 5, 1999

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DIESALE (TD) — Ultra Librarian
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