UCC2805DTR

Overview

The UCC2805DTR is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 8.4V to 30V and supports switching frequencies up to 1 MHz. The device features a maximum duty cycle of 50% and provides an output drive current of 1 A. It functions across an extended temperature range from -40°C to +125°C. The component utilizes a surface-mount SOIC-8 package and includes internal soft-start, under-voltage lockout, and frequency compensation capabilities for stable power conversion.

Feature Summary

• Implements current-mode control architecture for enhanced transient response
• Integrates internal oscillator with external synchronization capability
• Provides robust protection through under-voltage lockout and thermal shutdown

Applications

• Battery chargers
• Adapters and wall-wart power supplies
• Offline converters

Procurement Notes

Verify the specific suffix 'DTR' corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the operating temperature range meets the environmental specifications of the target application. Ensure compatibility with the intended PCB footprint for the SOIC-8 package before finalizing procurement orders.

Selection Notes

Select this component for applications requiring low quiescent current and high efficiency in isolated or non-isolated topologies. Consider the 50% maximum duty cycle limitation when designing boost or flyback circuits. Evaluate the need for external synchronization if precise frequency alignment with other system clocks is necessary.

Part Context

This part belongs to the UCC280x series of low-power BiCMOS current-mode PWM controllers. It shares functional similarities with the UC2805 but offers improved performance characteristics suitable for modern power management requirements. The series is designed to provide cost-effective solutions for various DC-DC conversion architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.