UCC3817DTR

Overview

The UCC3817DTR is a BiCMOS power factor preregulator designed for average current mode control. It operates with a switching frequency range of 6 kHz to 220 kHz and features a fixed 250 kHz internal oscillator option. The device integrates a high-voltage startup circuit, allowing operation from supply voltages up to 400 V. It utilizes a 16-pin SOIC package and supports an operating temperature range from 0°C to +70°C. The quiescent supply current is specified at 150 µA.

Feature Summary

• Integrates a high-voltage startup circuit for direct connection to rectified mains without external bias windings
• Provides average current mode control for improved line regulation and transient response
• Includes built-in cycle-by-cycle peak current limiting and undervoltage lockout

Applications

• Power factor correction pre-regulators in AC-DC converters
• Universal input power supplies
• Telecommunications power systems

Procurement Notes

Verify the specific suffix DTR indicates tape-and-reel packaging when ordering. Confirm the manufacturer is Texas Instruments to ensure component authenticity. Check the latest datasheet for any updates regarding RoHS compliance status or pinout configurations before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring integrated PFC functionality with minimal external components. Ensure the design accommodates the 16-pin SOIC thermal requirements. Verify that the required switching frequency falls within the 6 kHz to 220 kHz operational range for optimal efficiency.

Part Context

This part belongs to the UCC3817 series of power factor correction controllers. It is distinct from the UCC3813 series, which focuses on general-purpose switching control rather than dedicated PFC preregulation. The UCC3817 series is specifically engineered for high-power-factor applications in universal input environments.

Replacement Considerations

The UCC3817DWTR is a pin-compatible alternative available in a wider industrial temperature range. Verify if the extended temperature capability is required for the specific application environment before substituting.