UCC2803DG4

Overview

The UCC2803DG4 is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 3.6V to 12V and supports switching frequencies up to 1 MHz. The device features a maximum duty cycle of 100% and provides an output drive current of 1 A. It is housed in an SOIC-8 surface-mount package and is rated for operation between -55°C and +125°C.

Feature Summary

• Supports boost, flyback, and forward converter topologies
• Enables high-frequency operation with minimal component size
• Provides robust drive capability for external power switches

Applications

• High-density DC/DC converters
• Battery-powered equipment power supplies
• Adapters and chargers

Procurement Notes

Verify the specific suffix 'DG4' indicates lead-free construction and RoHS compliance as per Texas Instruments documentation. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications before finalizing procurement.

Selection Notes

Select this component for designs requiring low quiescent current and high efficiency in compact form factors. The wide input voltage range accommodates various single-cell battery applications. Consider the thermal performance of the SOIC-8 package relative to your expected power dissipation levels.

Part Context

This part belongs to the UCC2803 family of low-power current-mode PWM controllers. It shares functional similarities with other members like the UCC2803N but differs in packaging and temperature rating. The DG4 variant specifically denotes a lead-free, halogen-free version suitable for modern manufacturing processes.

Replacement Considerations

Direct substitutes include UCC2803D and UCC2803DRQ1. Verify pin compatibility and electrical parameters when cross-referencing with non-TI equivalents.