The TDA16850 is a high-performance integrated circuit designed by Infineon Technologies for power factor correction (PFC) and flyback converter applications. This IC is specifically tailored for use in switched-mode power supplies (SMPS) that require high efficiency, low standby power consumption, and compliance with international regulatory standards.

Applications

• AC-DC Power Supplies
• Adapters for Laptops and Mobile Devices
• LED Lighting Power Supplies
• Standby Power Supplies
• Flat Panel Displays (TVs, Monitors)

Features

• Active Power Factor Correction (PFC): Improves power factor to meet regulatory requirements.
• Flyback Controller: Controls the flyback converter topology.
• Burst Mode Operation: Enables very low standby power consumption.
• Soft Start Function: Reduces stress on components during startup.
• Overvoltage Protection (OVP): Protects against excessive output voltage.
• Overcurrent Protection (OCP): Protects against excessive output current.
• Open Loop Protection: Prevents damage in case of feedback loop failure.
• Undervoltage Lockout (UVLO): Ensures proper operation during startup and shutdown.

Benefits

• Improved Energy Efficiency: Reduces power losses and lowers energy consumption.
• Compliance with Regulatory Standards: Meets requirements for power factor and harmonic distortion.
• Reduced Standby Power: Minimizes energy waste when the device is not actively in use.
• Enhanced System Reliability: Protection features prevent damage and extend component lifespan.
• Simplified Design: Integrated functionality reduces the number of external components required.
• Cost-Effective Solution: Provides a high-performance PFC and flyback control solution at a competitive price.

Additional Details

The TDA16850 typically operates with a switching frequency in the range of tens to hundreds of kHz. It incorporates control circuitry that adjusts the duty cycle of the flyback converter to maintain a stable output voltage while also shaping the input current to achieve a high power factor. The burst mode operation reduces switching losses during light load conditions, further improving efficiency. The integrated protection features are essential for ensuring the robustness and reliability of the power supply.

Specific parameters, such as maximum voltage ratings, switching frequency range, and protection thresholds, can be found in the official datasheet from Infineon Technologies.