UCC2805D

Overview

The UCC2805D is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 10V to 36V 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 +85°C. The component is housed in an 8-pin SOIC surface-mount package, designed for efficient power management applications requiring precise pulse width modulation control.

Feature Summary

• Implements current-mode pulse width modulation control architecture
• Utilizes low-power BiCMOS technology for energy efficiency
• Provides high peak output drive capability for gate driving

Applications

• Flyback converter designs
• Forward converter topologies
• Half-bridge power supplies

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 surface-mount package variant. Confirm RoHS compliance status through official manufacturer documentation. Ensure the intended operating temperature range aligns with the specified -40°C to +85°C limits. Validate pinout compatibility against the official datasheet before integration into existing PCB layouts.

Selection Notes

Select this component for applications requiring a single-output current-mode PWM solution with moderate power handling. The 1 A output drive suits direct gate driving for medium-power MOSFETs. Consider the 50% maximum duty cycle limitation when designing transformer-based topologies. Evaluate thermal performance requirements relative to the SOIC-8 package constraints.

Part Context

This part belongs to the UCC2805 family of low-power BiCMOS current-mode PWM controllers. It serves as a core control element in isolated DC-DC conversion systems. The design emphasizes simplicity and reliability for cost-sensitive power supply implementations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.