UCC3818ADRG4

Overview

The UCC3818ADRG4 is a BiCMOS power factor preregulator controller manufactured by Texas Instruments. It operates in average current mode to achieve high-performance power factor correction. The device supports a switching frequency range of 6 kHz to 220 kHz and functions with a supply voltage between 9.7 V and 18 V. It is housed in a 16-pin SOIC package and is rated for operation within a temperature range of 0°C to 70°C.

Feature Summary

• Implements average current mode control for precise input current shaping
• Features integrated multiplier for sinusoidal line current draw
• Includes programmable soft-start and cycle-by-cycle current limiting
• Provides built-in brown-out protection and thermal shutdown

Applications

• Offline power factor correction pre-regulators
• Universal AC-DC power supplies
• Computer and peripheral power supplies
• Battery chargers requiring high power factor

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and manufacturing details as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint, noting that the standard part number may differ from the tape-and-reel variant. Ensure compatibility with the target switching frequency and operating temperature range before integration into the design.

Selection Notes

Select this component when designing systems requiring active power factor correction with average current mode control. It is suitable for applications needing a wide operating frequency range and robust protection features. Consider the SOIC-16 package constraints and the specific supply voltage requirements of the application circuit during the selection process.

Part Context

The UCC3818 series belongs to Texas Instruments' portfolio of power factor correction controllers. These devices are designed to improve the efficiency of power conversion stages by correcting the phase difference between voltage and current. The UCC3818ADRG4 variant specifically denotes the RoHS-compliant tape-and-reel version of the standard UCC3818AD chip.

Replacement Considerations

• UCC3818DR
• UCC3818D