FAN7930BMX

Overview

The FAN7930BMX is a power factor correction controller operating in Critical Conduction Mode (CrM). It features an integrated 800V high-voltage startup circuit, eliminating the need for external startup resistors. The device supports valley switching to minimize switching losses and includes comprehensive protection mechanisms such as overvoltage protection (OVP), undervoltage lockout (UVLO), and overcurrent protection (OCP). It operates within a supply voltage range of 20V to 24V and supports switching frequencies up to 350 kHz.

Feature Summary

• Integrated 800V high-voltage startup circuit reduces system component count and cost
• Critical conduction mode operation with valley switching technology for enhanced efficiency
• Built-in protection functions including overvoltage, undervoltage lockout, and overcurrent detection

Applications

• LED lighting drivers requiring high power factor
• AC/DC adapters and chargers
• Television power supplies
• General purpose switched-mode power supplies

Procurement Notes

Verify the specific suffix 'BMX' against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint and reflow profile requirements. Cross-reference the ordering code with official onsemi documentation to avoid confusion with similar CrM controllers.

Selection Notes

Select this component for designs prioritizing low standby power and simplified bill of materials due to the integrated high-voltage startup. It is suitable for applications where total harmonic distortion must be minimized without complex current sensing networks. Evaluate thermal performance constraints given the maximum operating temperature rating.

Part Context

This part belongs to the FAN7930 series of CrM PFC controllers originally developed by Fairchild Semiconductor, now part of onsemi. The series is designed to replace traditional continuous conduction mode solutions in medium-power applications, offering improved light-load efficiency through variable on-time control methods.

Replacement Considerations

Check for direct pin-compatible alternatives within the onsemi portfolio that may offer updated packaging or extended temperature ranges. Verify functional equivalence if substituting with other CrM controllers from different manufacturers.