Product Overview: UCC2804 Low-Power BiCMOS Current-Mode PWM Controller

The UCC2804 from Texas Instruments is a versatile and efficient low-power BiCMOS current-mode pulse width modulation (PWM) controller designed for a wide range of power supply applications. Its advanced features and robust design make it an ideal choice for off-line converters, DC-DC converters, and other power conversion applications that require precise control and high efficiency.

Key Features

• Low Startup and Operating Current: The UCC2804 boasts a very low startup current of typically 0.5µA and an operating current of typically 2.5mA, which enhances the overall efficiency of the power supply.
• Current Mode Control: The current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation.
• Wide Supply Voltage Range: This device operates over a wide supply voltage range from 4.5V to 18V, accommodating various input voltage levels for flexible design options.
• High-Frequency Operation: With an oscillator frequency range up to 1MHz, the UCC2804 is suitable for applications that require high-frequency switching to minimize the size of passive components.
• Trimmed Oscillator Discharge Current: The oscillator discharge current is trimmed to ensure precise frequency control, which is critical for consistent performance and reliable operation.

Applications

The UCC2804 is designed for a broad array of applications, including:

• Off-line power supplies
• DC-DC converters
• Portable power devices
• Power supplies for communication equipment
• Green-mode power supplies

Quality and Reliability

Texas Instruments is known for its commitment to quality and reliability, and the UCC2804 is no exception. It features under-voltage lockout (UVLO), ensuring that the device operates only when the supply voltage is within an acceptable range. The thermal shutdown feature protects against excessive temperature conditions, further enhancing the reliability of the power supply design.

Whether you are designing a new power supply or upgrading an existing system, the UCC2804 provides the performance, flexibility, and reliability needed to meet the demands of modern electronic devices.