UC2845DG4

Power Supply Controllers, Monitors Overview

The UC2845DG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance switching applications. It operates within a supply voltage range of 10 V to 30 V and supports a maximum switching frequency of 500 kHz. The device features a single output capable of sourcing 1 A of drive current, with a maximum duty cycle limited to 50%. It utilizes an SOIC-14 surface-mount package and functions across a temperature range from -40°C to +85°C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for enhanced transient response and simplified compensation.

Power Supply Controllers, Monitors Applications

• Boost converter topologies
• Flyback power supplies
• Forward converter designs

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DG4' indicates lead-free compliance and RoHS adherence as per manufacturer standards. Confirm the SOIC-14 package dimensions match the target PCB footprint. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Power Supply Controllers, Monitors Selection Notes

Select this component when a single-output current-mode solution is required for isolated or non-isolated topologies. The 50% duty cycle limit makes it suitable for applications where continuous conduction mode stability is critical. Consider the 1 A peak output current capability for driving external MOSFETs directly without additional buffer stages in moderate power scenarios.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC284x series of current-mode PWM controllers, which are industry-standard replacements for older UC184x and UC384x families. The DG4 variant specifically denotes a green (lead-free) SOIC-14 package. It shares functional similarities with the UC2844 but differs in package type and potentially minor electrical tolerances defined by the manufacturing lot.

Power Supply Controllers, Monitors Replacement Considerations

The UC2845AD8TRG4 serves as a direct functional replacement offering identical electrical specifications in an SOIC-8 reel package. For through-hole requirements, the UC2845AN provides equivalent performance in a PDIP-8 format. Verify pin-to-pin compatibility before substituting with these variants.