The LM5041BMTC is a PWM controller from Texas Instruments (formerly National Semiconductor) designed for use in phase-shifted full-bridge power converters. It incorporates all of the control features necessary to implement a phase-shifted full-bridge topology with primary-side control, simplifying the design of highly efficient and compact power supplies. The integrated features minimize external components and provide robust protection for demanding applications.

Applications:

• Isolated power supplies for telecom equipment.
• Server power supplies.
• Industrial power converters.
• High-power LED drivers.
• Battery chargers.

Features:

• Phase-shifted full-bridge control.
• Programmable switching frequency.
• Adjustable dead-time control.
• Integrated slope compensation.
• Programmable soft-start.
• Over-current and over-voltage protection.
• Under-voltage lockout (UVLO).

Benefits:

• High efficiency and power density in isolated power supplies.
• Simplified design with integrated control features.
• Robust protection against fault conditions.
• Adjustable parameters for optimized performance.
• Reduced component count and BOM cost.

Additional Details:

The LM5041BMTC utilizes phase-shifted full-bridge control to achieve high efficiency and soft-switching operation, reducing switching losses and improving thermal performance. The programmable switching frequency allows for optimization of the power supply's performance based on specific application requirements. Adjustable dead-time control ensures that the MOSFETs switch properly, preventing shoot-through and further enhancing efficiency.

Furthermore, the integrated slope compensation prevents subharmonic oscillations, ensuring stable operation under all load conditions. The programmable soft-start feature limits inrush current during startup, protecting the power supply and the load. The LM5041BMTC offers comprehensive protection features, including over-current and over-voltage protection, as well as under-voltage lockout, ensuring reliable and safe operation in demanding applications.