FAN7930MX_G

Overview

The FAN7930MX-G is a Power Factor Correction (PFC) controller from onsemi, designed for critical conduction mode (CrM) boost applications. It operates within a supply voltage range of 13 V to 20 V and supports switching frequencies up to 300 kHz. The device is housed in an SOP-8 surface-mount package and functions reliably across an industrial temperature range of -40°C to +125°C. Key electrical parameters include a maximum output current capability of 0.5 A and a minimum operating voltage threshold of 9.5 V.

Feature Summary

• Implements voltage mode PWM control with internal ramp signal comparison for MOSFET turn-off generation.
• Integrates comprehensive protection mechanisms including overvoltage, open feedback, overcurrent, undervoltage lockout, and input voltage missing detection.
• Utilizes variable on-time control methodology to achieve total harmonic distortion levels lower than traditional CrM boost controllers.

Applications

• Critical Conduction Mode (CrM) PFC Boost Applications
• Power Factor Correction Controllers
• LED Lighting Drivers

Procurement Notes

Verify the specific suffix against official datasheets to confirm functional variations. Ensure compatibility with SOP-8 mounting requirements. Confirm RoHS compliance status through manufacturer documentation before integration into regulated designs.

Selection Notes

Select this component for designs requiring CrM PFC topology with integrated protection features. Consider the 300 kHz frequency limit and SOP-8 thermal constraints. Evaluate the 13 V to 20 V supply range against system power delivery capabilities.

Part Context

Part of the FAN7930B/C series from onsemi, focusing on efficient power factor correction solutions. The series targets high-performance AC-DC conversion systems where low THD and robust protection are critical design parameters.

Replacement Considerations

Consult official substitution guides for verified alternatives. Generic replacements may lack identical protection thresholds or control loop characteristics.

FAQ

How does the FAN7930MX-G manage power consumption during low load conditions?

When the INV pin voltage drops below 0.45V, the device reduces running current to a very low level, effectively disabling operation to minimize standby power consumption.

What is the primary advantage of its voltage mode control architecture?

It eliminates the need for rectified AC line voltage sensing networks required by current mode controllers, thereby reducing power loss associated with input voltage sensing circuits.