UC1842J883B

Power Supply Controllers, Monitors Overview

The UC1842J883B is a current mode PWM controller manufactured by Texas Instruments under the Unitrode brand. It features a 500 kHz switching frequency and provides up to 1A output drive capability. The device utilizes an 8-pin ceramic dual in-line package (CDIP) designed for military specifications, specifically MIL-STD-883 Class B screening. It operates within a temperature range of -55°C to 125°C and employs bipolar technology for robust performance in demanding environments.

Power Supply Controllers, Monitors Feature Summary

• Current-mode pulse width modulation control architecture
• High peak output drive capability for efficient power stage control
• Military-grade ceramic dual in-line packaging with hermetic sealing
• Extended industrial and military temperature operation range

Power Supply Controllers, Monitors Applications

• High-reliability DC-to-DC converter designs
• Military aerospace power supply systems
• Industrial switching power supplies requiring ruggedized components

Power Supply Controllers, Monitors Procurement Notes

Verify the specific manufacturer source, as Rochester Electronics and Unitrode Corporation also list this part number. Confirm that the MIL-STD-883 Class B screening level is explicitly stated on the datasheet or certificate of compliance. Ensure the CDIP8 package type matches the required footprint for the target application.

Power Supply Controllers, Monitors Selection Notes

Select this component when high reliability and radiation hardness are critical requirements. The current mode control offers superior line regulation and cycle-by-cycle current limiting. Consider the thermal management needs associated with the ceramic DIP package and ensure the 500 kHz frequency aligns with the magnetic component design constraints.

Power Supply Controllers, Monitors Part Context

This component belongs to the UC184x series of current mode PWM controllers. The 'J' suffix typically denotes a military grade variant, while '/883B' indicates compliance with MIL-STD-883 testing standards. It shares functional similarities with commercial counterparts like the UC1842 but differs in qualification and packaging durability.

Power Supply Controllers, Monitors Replacement Considerations

UC1842J/883B is listed as an equivalent designation by multiple distributors. Verify pinout compatibility before substituting with other current mode PWM controllers from different manufacturers.