UC2842ADG4

Power Supply Controllers, Monitors Overview

The UC2842ADG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for DC-DC switching applications. It supports Boost, Buck, Flyback, and Forward topologies within a single-output configuration. The device operates with a switching frequency of 500 kHz and delivers an output current of 200 mA at 5 V. It functions within a supply voltage range of 12 V to 28 V, consuming 25 mA of operating current. The component features 50 ns rise and fall times and accommodates up to 100% maximum duty cycle. It is housed in a SOIC-14 surface-mount package and operates between 0°C and +70°C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for precise regulation
• Supports multiple converter topologies including boost, buck, flyback, and forward
• Provides high peak drive capability for efficient power stage control

Power Supply Controllers, Monitors Applications

• High-density point-of-load DC-DC converters
• Forward converter designs requiring isolated outputs
• Flyback power supplies for general-purpose electronics

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DG4' confirms lead-free compliance and RoHS status as documented by Texas Instruments. Confirm the SOIC-14 package dimensions match the target PCB footprint. Ensure the commercial temperature grade (0°C to +70°C) aligns with the operational environment requirements. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Power Supply Controllers, Monitors Selection Notes

Select this component when a single-output current-mode controller is required for standard non-isolated or isolated topologies. The SOIC-14 package offers a balance of thermal performance and board space efficiency compared to wider packages. Consider the 500 kHz switching frequency for optimizing passive component size. Verify that the 200 mA output drive capability meets the gate charge requirements of the intended power MOSFETs.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC3842A series of current-mode PWM controllers from Texas Instruments. It shares functional similarities with other members of the family but is distinguished by its specific temperature rating and package configuration. The UC2842ADG4 represents the commercial grade variant, differing from industrial or automotive qualified versions in operating temperature range and reliability specifications.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include the UC2842AD8G4 and UC2842D8G4 from Texas Instruments, which share identical electrical characteristics and pinouts. Other compatible options may include equivalent parts from Microchip Technology, provided the package and temperature ratings are verified.