UCC2804DG4

Overview

The UCC2804DG4 is a Texas Instruments PWM current-mode controller designed for surface-mount applications in an 8-pin SOIC package. It supports Boost, Flyback, and Forward topologies with a maximum switching frequency of 1 MHz. The device features a 50% maximum duty cycle limit, 1 A output drive capability, and operates within a temperature range of -40°C to +85°C. Electrical characteristics include a 41 ns rise time and 44 ns fall time, ensuring precise timing control for efficient power conversion systems.

Feature Summary

• Implements current-mode PWM control architecture for enhanced transient response
• Integrates a hard duty-cycle limit to prevent transformer saturation
• Provides robust gate drive output capable of sourcing 1 A peak current

Applications

• Boost converter designs
• Flyback power supply implementations
• Forward converter circuits

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free packaging compliance when sourcing. Confirm the SOIC-8 physical dimensions match your PCB footprint requirements. Ensure the operating voltage range aligns with your system's supply constraints. Cross-reference the manufacturer part number against authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component for single-output isolated or non-isolated converters requiring simple current-mode regulation. It is suitable for applications where a fixed 50% duty cycle ceiling is acceptable. Consider alternative models if higher frequencies or dual-channel outputs are necessary. Evaluate thermal performance within the specified ambient temperature limits during design.

Part Context

This device belongs to the UCC2804 series of single-channel PWM controllers. It serves as a fundamental building block for low-to-medium power AC-DC and DC-DC adapters. The family focuses on cost-effective solutions using standard current-mode techniques without complex digital interfaces.

Replacement Considerations

The UCC2804D is the direct commercial equivalent. Verify pin compatibility and electrical specifications before substitution.