UC1843AVTD2

Power Supply Controllers, Monitors Overview

The UC1843AVTD2 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-reliability applications. It supports Boost, Flyback, and Forward topologies with a single output channel. The device operates at a switching frequency of 500 kHz and delivers a maximum duty cycle of 100%. It features an output drive current of 200 mA and draws a typical operating supply current of 25 mA. The unit functions within a supply voltage range of 12 V to 18 V. It is rated for operation between -55°C and +125°C. The component is supplied in a Die package format.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture for enhanced load response
• Integrated error amplifier with internal bandgap reference
• Undervoltage lockout with hysteresis for stable startup
• Pulse-by-pulse current limiting protection

Power Supply Controllers, Monitors Applications

• Offline flyback converters
• Forward converter power supplies
• Boost DC-to-DC conversion circuits
• Military and aerospace power systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'AVTD2' against official Texas Instruments documentation to confirm die-level availability and handling requirements. Ensure procurement channels support bare die distribution. Confirm RoHS compliance status through manufacturer datasheets. Validate that the source provides traceable quality records suitable for high-reliability environments.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated or non-isolated converters requiring current-mode control. Verify compatibility with the required topology among Boost, Flyback, and Forward options. Ensure the system can accommodate the 500 kHz switching frequency. Confirm that the 200 mA output drive capability meets gate drive requirements for the selected power switch.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC1843 series of current-mode PWM controllers from Texas Instruments. It shares functional similarities with other members like the UC1843AMDREP but differs in packaging and qualification level. The series is widely used in industrial and defense power electronics where robust performance under extreme temperatures is mandatory.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers: UC1843AMDREP.