UC2842NG4

Power Supply Controllers, Monitors Overview

The UC2842NG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for single-ended forward converter applications. It operates within a supply voltage range of 10V to 30V and supports switching frequencies up to 500 kHz. The device features a 97% maximum duty cycle and includes an integrated oscillator with trim capability. Key internal components include a precision error amplifier, a current-sensing comparator, and a high-current output stage capable of driving external power MOSFETs.

Power Supply Controllers, Monitors Feature Summary

• Integrated current-mode control architecture for simplified feedback loop compensation
• On-chip oscillator with frequency trimming capability for precise timing control
• High-current push-pull output driver optimized for direct gate drive of power switches

Power Supply Controllers, Monitors Applications

• Single-ended forward power supplies
• Flyback converter designs
• Boost DC-DC converter topologies

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'G4' confirms lead-free compliance and RoHS status as per manufacturer specifications. Confirm package type PDIP-8 availability and ensure ordering quantities align with standard tube packaging configurations provided by distributors.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring a 97% duty cycle limit and operation in single-ended forward topologies. Ensure the design accommodates the 500 kHz switching frequency and verify that the input voltage range matches the system's operational requirements.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers. It shares functional similarities with the UC1842 (military grade) and UC3842 (industrial grade), differing primarily in temperature range specifications while maintaining identical pinouts and electrical characteristics.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include UC2842N and UC2842ADWTRG4. Verify compatibility regarding operating temperature ranges and package types before implementation.