UCC3819AN

Overview

The UCC3819AN is a BiCMOS power factor preregulator IC from Texas Instruments, designed for single-phase PFC applications. It operates in continuous conduction mode (CCM) with an average current control method. The device supports a practical operating frequency up to 0.25 MHz and features a peak gate drive output current of 1.2 A. It functions within a supply voltage range of 10.8 V to 17 V and includes UVLO thresholds at 10.2 V/9.7 V. The component is housed in a 16-SOIC package and operates within a temperature range of 0°C to 70°C.

Feature Summary

• Implements average current mode control for single-phase power factor correction.
• Provides high-current gate drive capability for efficient MOSFET switching.
• Integrates overvoltage protection and enable functionality.

Applications

• Single-phase power factor correction circuits
• Power factor preregulators
• AC-DC power supplies

Procurement Notes

Verify the specific suffix 'A' indicates the commercial temperature grade variant. Confirm the 'N' suffix corresponds to the SOIC package type as documented. Check manufacturer status as some variants may be discontinued or have limited availability through authorized channels.

Selection Notes

Select this component for designs requiring average current mode PFC control. Ensure the application operates within the specified 0°C to 70°C temperature range. Verify compatibility with the 16-SOIC footprint and 1.2 A gate drive requirements.

Part Context

The UCC3819 series belongs to Texas Instruments' portfolio of BiCMOS power factor preregulators. It is functionally similar to the UCC2819A but differs in temperature rating and packaging options. The 'AN' designation specifies the commercial grade version in the SOIC package.

Replacement Considerations

The UCC2819A is a related part with identical electrical specifications but offers an extended industrial temperature range (-40°C to 85°C). Verify if the thermal requirements of the application necessitate the industrial grade variant.