UC2852NG4

Overview

The UC2852NG4 is a high-power-factor preregulator manufactured by Texas Instruments, designed for power factor correction applications. It operates within a supply voltage range of 10V to 30V and supports a switching frequency of 200 kHz. The device features an operating temperature range from -40°C to +85°C and utilizes a PDIP-8 through-hole package. Key electrical parameters include a working supply current of 400 µA and a maximum output current capability of 1 A. It is RoHS compliant and classified under PMIC power management ICs.

Feature Summary

• Implements controlled on-time zero-current switching for efficient power factor correction
• Integrates a multiplier with analog division for precise line regulation
• Includes built-in soft-start circuitry to limit inrush current during startup

Applications

• High power-factor pre-regulators
• Active power factor correction circuits
• Universal input AC-DC power supplies

Procurement Notes

Verify the 'G4' suffix indicates lead-free composition and tin-plated terminals per Texas Instruments standards. Confirm the PDIP-8 package type matches your PCB footprint requirements. Ensure the component meets RoHS directives for your target market. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Selection Notes

Select this component for designs requiring high efficiency and low harmonic distortion in AC-DC conversion. The 200 kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the PDIP-8 package for prototyping or through-hole manufacturing processes. Evaluate thermal performance within the specified -40°C to +85°C operating range for your application environment.

Part Context

The UC2852 belongs to the UC285x series of power factor controllers from Texas Instruments. It is functionally similar to the UC3852 but optimized for commercial temperature ranges. The NG4 variant specifically denotes the lead-free packaging configuration. This part is widely used in standard offline switch-mode power supply architectures.

Replacement Considerations

UC2852N serves as the non-leaded equivalent without the G4 suffix designation. UC3852 is the industrial temperature grade counterpart offering extended thermal performance. Verify pinout compatibility and thermal characteristics when substituting these variants.