UCC2807D-3/70034

DC DC Switching Controllers Overview

The UCC2807D-3/70034 is a PWM controller manufactured by Texas Instruments (formerly Unitrode), designed for boost, flyback, and forward converter topologies. It features a single output with a maximum duty cycle of 78 percent and an output current capability of 1 ampere. The device operates at a switching frequency of 1 MHz with a fall time of 20 nanoseconds. It supports surface mount installation in an SOIC-8 package and functions within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Supports boost, flyback, and forward converter topologies
• Features programmable maximum duty cycle control
• Provides positive output step-up and step-down regulation

DC DC Switching Controllers Applications

• Boost converter systems
• Flyback power supply designs
• Forward converter applications

DC DC Switching Controllers Procurement Notes

Verify the manufacturer designation, as the component is historically associated with Unitrode but currently produced under Texas Instruments. Confirm the specific suffix '70034' aligns with your required revision or tape-and-reel specification. Ensure the SOIC-8 package matches your PCB footprint requirements. Check humidity sensitivity handling instructions if storage conditions exceed specified limits. Validate that the 1 MHz switching frequency meets your system design constraints.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring flexible topology support including boost, flyback, and forward configurations. The 1 MHz switching frequency allows for compact magnetic component sizing. The SOIC-8 package offers a compact solution for space-constrained designs. Consider the 78 percent maximum duty cycle limit when designing transformer turns ratios. Verify thermal performance within the -40°C to +85°C operating range for your specific environment.

DC DC Switching Controllers Part Context

This component belongs to the UCC2807 family of switching controllers. It represents a transition from the original Unitrode product line to Texas Instruments manufacturing. The part number includes specific suffixes indicating package type and reel configuration. It serves as a core control element for isolated and non-isolated DC-DC conversion circuits.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other UCC2807 variants only if pinout and electrical specifications match exactly. Verify compatibility with existing gate drive requirements and feedback loop compensation networks before substitution.