onsemi

MC33368DG

MC33368DG Description

The MC33368DG from onsemi is a Critical Conduction Mode (CRM) Power Factor Correction (PFC) controller designed for high-efficiency power supply applications. Operating within a 10V to 16V supply range, this IC ensures optimal power factor correction while minimizing harmonic distortion. Packaged in a 16-SOIC tube format, it is RoHS3 compliant and adheres to REACH and EAR99 regulations. Though marked as obsolete, it remains a reliable choice for legacy designs requiring CRM PFC control. Its GreenLine™ series designation highlights its energy-efficient performance, making it suitable for environmentally conscious applications.

MC33368DG Features

• Critical Conduction Mode (CRM): Enhances efficiency by operating at the boundary between discontinuous and continuous conduction modes.
• Low Startup Current (16 mA): Reduces power consumption during initialization.
• Surface-Mount Design (16-SOIC): Facilitates compact PCB layouts in space-constrained applications.
• Wide Supply Voltage Range (10V–16V): Supports robust performance across varying input conditions.
• RoHS3/REACH Compliance: Meets stringent environmental and safety standards.
• Moisture Sensitivity Level 1 (MSL1): Ensures durability in humid environments without baking requirements.

MC33368DG Applications

Ideal for AC-DC power supplies, LED drivers, and industrial SMPS requiring high power factor (>0.95). Its CRM operation makes it particularly effective in:

• Server/Telecom PSUs: Where efficiency and harmonic reduction are critical.
• Consumer Electronics: Such as LCD TVs and adapters needing compliance with energy standards (e.g., 80 PLUS).
• Lighting Systems: Including high-brightness LED drivers with PFC requirements.

Conclusion of MC33368DG

The MC33368DG offers a balanced blend of efficiency, compact design, and regulatory compliance, making it a pragmatic choice for legacy or niche PFC applications. While newer alternatives may exist, its proven CRM performance and onsemi’s reliability ensure continued relevance in energy-conscious power systems. Engineers should evaluate its obsolete status against project longevity needs but can leverage its low-startup current and robust voltage range for optimized designs.