The Texas Instruments UC1843B-SP is a Current Mode PWM Controller suitable for communication, optical and RADAR imaging payload applications. The component is radiation hardened and features pulse-by-pulse current limiting, trimmed oscillator discharge current, low start-up current and an internally-trimmed bandgap reference.


Orderable Part Numbers

Key features

  • QML class V (QMLV) qualified, SMD 5962-86704
  • 5962R8670412VYC:
    • Radiation hardness assurance (RHA) up to
      100-krad(Si) total ionizing dose (TID)
  • Optimized for offline and DC-to-DC converters
  • Low start-up current (< 0.5 mA)
  • Trimmed oscillator discharge current
  • Automatic feed forward compensation
  • Pulse-by-pulse current limiting
  • Enhanced load response characteristics
  • Undervoltage lockout (UVLO) with hysteresis
  • Double-pulse suppression
  • High-current totem-pole output
  • Internally-trimmed bandgap reference
  • 500-kHz operation
  • Low RO error amplifier

Reference designs

  • TIDA-070002 - 20- to 40-VIN, 50-W Space-grade isolated flyback DC/DC over-current protection reference design

Testing & qualification

Disclaimer: satsearch is not responsible for any mistakes on this page, although we do our best to ensure correctness. Please report any mistakes to us.

Last updated: 2021-12-21


Radiation-hardness-assured (RHA), 30-V, 1-A, PWM controller with 8.4-V/7.6-V UVLO 100% duty cycle



supply voltage
< 25 V
< 500 kHz
operating temperature
-55 to 125 C
RoHS compliance
REACH compliance
export control


Submit your request

Request details

The more information you can provide the better.

Personal Information

Submitting your information allows us to get in touch with you once we get a response from the supplier.

Please select one of the following:

Would you like to subscribe to our newsletter?

Requests that are submitted through satsearch are anonymously posted to our leads page.

from our blog

Go to blog

Spotlight: Space Enhanced Plastic products for NewSpace - with Texas Instruments

Ground station service providers: an overview of telemetry and telecommand communication services and networks for small satellites

Optical communications for small satellites and CubeSats - product roundup