UC1846J

Power Supply Controllers, Monitors Overview

The UC1846J is a military-grade, current-mode PWM controller manufactured by Texas Instruments. It operates within an extended temperature range of -55°C to +125°C and utilizes a 16-pin DIP package. The device supports multiple converter topologies including Boost, Flyback, Forward, Full Bridge, Half Bridge, and Push-Pull configurations. Key electrical specifications include a switching frequency of 500 kHz, a maximum duty cycle of 50%, and a regulated output voltage of 5.1 V. The controller provides a peak output drive current of 500 mA with rise and fall times of 50 ns.

Power Supply Controllers, Monitors Feature Summary

• Military-grade qualification for operation in extreme environmental conditions
• Current-mode control architecture for enhanced load response and pulse-by-pulse current limiting
• Integrated oscillator with automatic feed-forward compensation
• Undervoltage lockout with hysteresis and double-pulse suppression

Power Supply Controllers, Monitors Applications

• High-reliability DC-to-DC converters
• Offline power supplies
• Aerospace and defense electronic systems
• Industrial power management modules

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'J' indicates the military grade variant when sourcing. Confirm RoHS compliance status as military parts may differ from commercial standards. Ensure the supplier provides traceability documentation required for defense applications. Check for availability of official datasheets specifying the exact operating limits for this grade.

Power Supply Controllers, Monitors Selection Notes

Select the UC1846J when system requirements mandate operation across the full military temperature spectrum. This component is suitable for designs requiring robust current-mode control with built-in protection features. Consider the through-hole packaging if PCB layout constraints favor DIP formats over surface-mount alternatives.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC1846/7 family of current-mode PWM controllers. It shares functional similarities with commercial variants like the UC3846 but offers extended temperature performance. The device integrates essential power management functions into a single IC, reducing external component count.

Power Supply Controllers, Monitors Replacement Considerations

UC1846MDWREP is a verified military-grade alternative in SOIC-16 packaging. UC2846NG4 serves as a commercial equivalent with limited temperature range. Verify pin compatibility and thermal characteristics before substituting.