UCC2818AN

Overview

The UCC2818AN is a BiCMOS power factor preregulator designed for average current mode control. It operates within a switching frequency range of 6 kHz to 220 kHz and supports universal AC input voltages. The device features a wide operating temperature range from -40°C to +85°C and utilizes a 16-pin PDIP package. Key electrical characteristics include a supply voltage range of 12V to 17V, a typical startup current of 150 µA, and integrated soft-start functionality. It provides high power factor correction with low total harmonic distortion for AC-DC front-end applications.

Feature Summary

• Implements average current mode control architecture for precise regulation
• Integrates soft-start circuitry to manage inrush currents during startup
• Supports universal AC input voltage ranges for global compatibility

Applications

• Universal AC input power supplies
• Average current mode PFC pre-regulators
• High-efficiency AC-DC conversion systems

Procurement Notes

Verify the specific package type and temperature grade against project requirements. Confirm that the PDIP-16 through-hole format aligns with the PCB assembly capabilities. Ensure the 12V to 17V supply voltage range meets the system's auxiliary power constraints before finalizing procurement.

Selection Notes

Select this component when average current mode control is required for improved line regulation and transient response compared to fixed-frequency controllers. The wide operating temperature range makes it suitable for industrial environments. Consider the through-hole packaging if automated surface-mount assembly is not available or if mechanical robustness is prioritized.

Part Context

This part belongs to the UCC2818A series of power factor correction controllers. It is distinct from the automotive-grade UCC2818AQDRQ1 and the SOIC-packaged variants like UCC2818AD. The UCC2818AN specifically denotes the through-hole PDIP-16 version intended for general-purpose commercial and industrial power supply designs.

Replacement Considerations

Direct replacements include other UCC2818A variants such as UCC2818AD or UCC2818DTR, noting differences in package style (SOIC vs. PDIP). For equivalent functionality in different packages, verify pinout compatibility and thermal performance specifications.