UC3852NG4

Overview

The UC3852NG4 is a high power-factor preregulator controller from Texas Instruments, designed for power factor correction (PFC) applications. It operates within a supply voltage range of 5V to 30V and features a fixed switching frequency of 200 kHz. The device supports a maximum duty cycle of 95% and includes a 5V lockout threshold for protection. It is housed in a PDIP-8 through-hole package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated high power-factor preregulator controller for PFC circuits
• Fixed 200 kHz switching frequency operation
• Wide supply voltage range with 5V lockout protection
• High efficiency design supporting up to 95% duty cycle

Applications

• Power factor correction in AC-DC power supplies
• High power-factor preregulators
• Universal input power conversion systems

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet specifications. Ensure the PDIP-8 package type matches your PCB footprint requirements. Confirm that the operating temperature range of -40°C to +85°C meets your environmental constraints. Cross-reference the ordering suffix NG4 with the specific variant details provided by the supplier to ensure compatibility with your system design.

Selection Notes

Select this component when designing systems requiring active power factor correction with a fixed switching frequency. It is suitable for applications needing a wide input voltage range and robust lockout protection. Consider the PDIP-8 package if through-hole mounting is preferred. Evaluate the 200 kHz frequency against EMI requirements and transformer size constraints for your specific power level.

Part Context

The UC3852 belongs to the UC385x series of power factor controllers from Texas Instruments. It serves as a specialized solution for improving the power factor of AC-DC converters. The NG4 suffix indicates a lead-free, halogen-free version compliant with RoHS standards. This part is distinct from current-mode PWM controllers like the UC3842 series.

Replacement Considerations

The UC3852N is the non-green equivalent part number. Verify pinout compatibility before substitution.