FSB67508

Power Driver Modules Overview

The FSB67508 is a high-voltage switching controller designed for offline flyback converters. It integrates a high-voltage current source to eliminate the need for external startup resistors, thereby reducing standby power consumption. The device employs fixed-frequency peak current mode control with cycle-by-cycle current limiting. It features an internal oscillator and includes comprehensive protection mechanisms such as under-voltage lockout, over-voltage protection, and thermal shutdown to ensure reliable operation in various power supply applications.

Power Driver Modules Feature Summary

• Integrates a high-voltage current source for low standby power consumption without external startup resistors
• Fixed-frequency peak current mode control architecture
• Includes cycle-by-cycle current limiting for robust overload protection
• Built-in thermal shutdown and voltage protection circuits

Power Driver Modules Applications

• Offline flyback power supplies
• Adapters and chargers
• General-purpose isolated DC/DC converters

Power Driver Modules Procurement Notes

Verify the specific suffix codes on the component marking against the official Fairchild (now onsemi) datasheet to confirm package type and temperature range. Ensure the supplier provides valid RoHS compliance documentation. Cross-reference the manufacturer part number with current onsemi catalogs as product lines may have been rebranded or superseded by newer generations.

Power Driver Modules Selection Notes

Select this controller for designs requiring simplified bill of materials through integrated high-voltage startup. It is suitable for applications where fixed-frequency operation is preferred over variable frequency schemes. Consider the thermal performance requirements and ensure adequate heat dissipation for the intended load conditions. Verify input voltage ranges match the specific converter topology design.

Power Driver Modules Part Context

This component belongs to the family of offline switcher controllers developed by Fairchild Semiconductor, which has since become part of onsemi. These devices are engineered to provide cost-effective solutions for AC-DC conversion. The FSB67508 specifically targets the flyback topology, offering a balance between performance and simplicity for medium-power applications.

Power Driver Modules Replacement Considerations

Consult onsemi documentation for direct replacements or pin-compatible upgrades. Newer generations may offer improved efficiency or additional integrated features while maintaining functional compatibility.