The UCC2809P-2G4 is a versatile and efficient PWM (Pulse Width Modulation) controller from Texas Instruments, designed to deliver high-performance power management solutions in a wide range of applications. As part of the UCC2809x family, it operates with a BiCMOS process that allows for low-power consumption while maintaining the speed and robustness of a CMOS process.

Key Features

• Current-Mode Control: This feature provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation.
• Low Startup and Operating Current: The device has a typical startup current of 0.5 µA and an operating current of 1.5 mA, making it suitable for battery-operated and power-sensitive applications.
• Trimmed Oscillator Discharge Current: This helps in achieving consistent and accurate timing parameters across the entire range of operating conditions.
• High-Current Totem-Pole Output: Capable of directly driving a MOSFET, this output stage is designed to minimize transition losses.
• Frequency Foldback: Helps reduce switching losses during overload conditions by reducing the switching frequency.
• Under-Voltage Lockout (UVLO): Both turn-on and turn-off thresholds are included, ensuring that the power supply operates only when the input voltage is within an acceptable range.

Applications

The UCC2809P-2G4 is ideal for a wide array of applications due to its flexible and efficient design. It is commonly used in:

• Offline power supplies
• DC-DC converters
• Battery chargers
• Power supplies for communication systems
• Green-mode power supplies

Product Specifications

The UCC2809P-2G4 is available in a PDIP-8 package, and it operates over a temperature range of -40°C to +85°C. It features a fixed frequency operation at 380 kHz, which is a balance between efficiency and manageable EMI. The device is designed to work with a wide input voltage range, making it highly adaptable for various power systems.

For detailed technical specifications and application guidance, designers are advised to consult the datasheet and Texas Instruments' comprehensive technical support resources.