TL2845D

Overview

The TL2845D is a current-mode PWM controller manufactured by Texas Instruments, designed for DC-DC switching applications. It operates within an input voltage range of 12 V to 30 V, with a nominal supply of 15 V. The device supports boost, flyback, and forward topologies, featuring a maximum switching frequency of 500 kHz and a duty cycle limit of 50%. Packaged in an 8-pin SOIC (SOP) format, it functions as a single-output regulator controller.

Feature Summary

• Implements current-mode pulse width modulation control architecture
• Supports multiple converter topologies including boost, flyback, and forward configurations
• Provides integrated oscillator with adjustable switching frequency capability

Applications

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

Procurement Notes

Verify the specific suffix designation against official documentation, as variations may indicate different temperature grades or packaging options. Confirm RoHS compliance status and ensure the selected variant matches the required operating temperature range for the target application environment.

Selection Notes

Select this component for applications requiring current-mode control with a fixed maximum duty cycle limit. Ensure the design accommodates the specified 12 V to 30 V supply range and utilizes the 8-pin SOIC package constraints. Validate that the 500 kHz frequency requirement aligns with external magnetic component specifications.

Part Context

This part belongs to the TL284x series of switching controllers from Texas Instruments. It shares functional similarities with other members like the TL2845DR and TL2845BDR, differing primarily in package type and manufacturing lot specifications while maintaining core electrical characteristics.

Replacement Considerations

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