FAN9673Q

Overview

The FAN9673Q is a three-channel interleaved Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller IC designed for PFC pre-regulators. It operates in a 32-LQFP (7x7) package with a supply voltage of 15V and an operating temperature range of -40°C to 105°C. The device supports programmable switching frequencies of 18kHz–40kHz or 55kHz–75kHz, with a startup current of 30 µA. It implements average current mode control to ensure compliance with IEC1000-3-2 standards.

Feature Summary

• Integrates three-channel interleaved CCM boost PFC control circuitry to significantly reduce input and output ripple currents.
• Features innovative channel management that allows secondary channels to load and unload smoothly based on CM pin voltage settings.
• Includes TriFault Detect™ functionality to protect feedback loops from faults such as overvoltage during sudden load decreases.

Applications

• High-power AC to DC power supplies requiring IEC1000-3-2 harmonic compliance
• Industrial equipment power systems utilizing 3-channel interleaved CCM boost topology
• Server and data center power units designed for wide input voltage ranges

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and environmental compliance status. Confirm RoHS3 and REACH declarations directly with onsemi documentation. Ensure the ordering part number matches the required lead time and moisture sensitivity level (MSL 3) for your assembly process. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for designs requiring high-efficiency power factor correction with reduced EMI filtering requirements due to interleaving. It is suitable for applications needing precise load transient response through its channel management feature. Consider the 32-pin LQFP package constraints and thermal performance within the specified temperature range when designing the PCB layout.

Part Context

The FAN9673Q belongs to the FAN9673 series of power management ICs focused on advanced PFC solutions. It is manufactured by onsemi and serves as a specialized controller for high-performance power supplies. The Q suffix typically denotes specific packaging or environmental qualification variants within the product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult onsemi technical support for direct replacements or cross-references.

FAQ

How does the FAN9673Q handle feedback loop faults?

It utilizes the TriFault Detect™ function to provide comprehensive protection for feedback loops, including shutting down the PFC stage if an overvoltage condition occurs due to a sudden load decrease.

What control mode does the FAN9673Q use?

The device employs average current mode control to implement the boost-type power factor correction circuit.