UC2842ADTRG4

Power Supply Controllers, Monitors Overview

The UC2842ADTRG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance power supply applications. It operates within a supply voltage range of 10V to 30V and supports switching frequencies up to 500 kHz. The device features a maximum duty cycle of 100% and provides an output drive capability of 1A peak current. It is housed in an 8-SOIC package and functions across a temperature range of -40°C to +85°C. Key electrical parameters include a typical operating supply current of 25 mA and rise/fall times of 50 ns.

Power Supply Controllers, Monitors Feature Summary

• Supports boost, flyback, and forward converter topologies
• Enables precise current-mode control with frequency compensation
• Features adjustable oscillator timing for flexible design
• Includes undervoltage lockout and soft-start functionality

Power Supply Controllers, Monitors Applications

• DC-DC converters
• Offline chargers
• Power factor correction circuits
• Battery chargers

Power Supply Controllers, Monitors Procurement Notes

Verify the suffix 'G4' indicates lead-free compliance and RoHS standards when sourcing. Confirm the 'D' designation corresponds to the industrial temperature grade (-40°C to +85°C). Ensure the 'TR' suffix matches the required tape-and-reel packaging format for automated assembly processes. Cross-reference the manufacturer part number with official TI documentation to avoid counterfeit components.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring single-output current-mode control with high efficiency. It is suitable for applications needing a maximum duty cycle near 100%, such as boost converters. Consider the 8-SOIC package size for space-constrained PCB layouts. Evaluate the 500 kHz switching frequency against electromagnetic interference requirements and transformer sizing constraints.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers from Texas Instruments. It shares architectural similarities with the UC1842 (military grade) and UC3842 (extended temperature range), differing primarily in temperature specifications and manufacturing revisions. The UC2842 series is widely used in general-purpose power management solutions.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include UC2842ADWTRG4 (SOIC-16 package) and UC2842N (PDIP-8 package). For pin-compatible alternatives, consider UC3842AD8 or UC1842AD8, noting differences in temperature ranges and military qualification levels.