The LM5035CMHX is a high-performance PWM controller with integrated high-voltage start-up regulator, ideal for implementing isolated power converters. Manufactured by National Semiconductor (now Texas Instruments), it is designed for half-bridge and full-bridge topologies, offering advanced features for efficient and reliable operation.

Applications:

• Isolated DC-DC converters
• Telecom power supplies
• Industrial power supplies
• Medical power supplies
• Server power supplies

Features:

• Integrated high-voltage start-up regulator
• Programmable oscillator frequency
• Current mode control
• Programmable soft-start
• Cycle-by-cycle current limit
• Over-voltage protection
• Under-voltage lockout (UVLO)
• Maximum duty cycle limit

Benefits:

• Simplified power supply design: Integrated features reduce the number of external components required.
• Improved efficiency: Current mode control and programmable oscillator frequency optimize efficiency.
• Enhanced reliability: Over-voltage protection, under-voltage lockout, and cycle-by-cycle current limit protect the device and the system.
• Flexible operation: Programmable soft-start and maximum duty cycle limit allow for customized operation.

Additional Details:

The LM5035CMHX PWM controller is typically packaged in a small HTSSOP (Thermally Enhanced Thin Shrink Small Outline Package). It requires external components for operation, including MOSFETs, transformers, and feedback components. The part is designed for high-performance power converters where efficiency, reliability, and flexibility are critical.

Electrical Specifications:

• Input Voltage Range: 11V to 75V
• Operating Frequency: Up to 1 MHz (check datasheet for precise programmable range)
• Output Voltage: Dependent on transformer turns ratio and feedback network
• Maximum Duty Cycle: Programmable (check datasheet for precise programmable range)
• Operating Temperature Range: -40°C to +125°C