FAN4802LMY

Overview

The FAN4802LMY is a Power Factor Correction (PFC) controller manufactured by onsemi, formerly Fairchild Semiconductor. It operates in average current mode with a fixed switching frequency of 64 kHz. The device supports a supply voltage range of 11V to 22V and features a low start-up current of 30 µA. It is housed in a 16-SOIC package with a width of 3.90 mm. The component is rated for an operating temperature range from -40°C to 105°C. This integrated circuit is designed for versatile protection and compensation requirements using minimal external components.

Feature Summary

• Integrates average current mode PFC control with a fixed 64 kHz switching frequency
• Features low start-up current capability to reduce overall system power consumption
• Supports operation across a wide industrial temperature range
• Designed for high integration with minimal external component requirements

Applications

• Boost PFC stages in switch-mode power supplies
• Power factor correction circuits requiring average current control
• Industrial power supply designs
• Consumer electronics power adapters

Procurement Notes

Verify the obsolete status of this component before design finalization, as it is marked as Not Recommended for New Designs. Confirm that the 16-SOIC package dimensions match the target PCB footprint. Ensure the 11V to 22V supply voltage range aligns with the auxiliary winding or bias supply design. Check for available replacement parts within the same family if long-term availability is required.

Selection Notes

Select this controller when average current mode operation is preferred over peak current mode for lower electromagnetic interference. The fixed 64 kHz frequency simplifies magnetic component selection compared to variable frequency controllers. Consider the 16-SOIC package constraints for thermal management. Verify that the 30 µA start-up current meets the soft-start requirements of the specific power supply topology.

Part Context

The FAN4802LMY belongs to the FAN4800 series of PFC/PWM controller combinations. These devices are specifically engineered for applications combining boost PFC and PWM regulation. The series offers versatility through few external components while providing robust protection features. The LMY suffix indicates the SOIC surface-mount package variant within this product line.

Replacement Considerations

Public confirmed substitute part numbers: FAN4800AMY, FAN4800ANY.