The UCC3808N-2 is a versatile and robust pulse-width modulation (PWM) controller from Texas Instruments, designed for efficient power supply management. This device is part of the UCC3808 series, which offers low-power operation and is tailored for a wide range of applications including AC-DC adapters, offline power converters, DC-DC modules, and telecommunications equipment.

Key Features

• Current-Mode Control: The UCC3808N-2 employs current-mode control which provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation.
• Low Startup and Operating Current: This device stands out with its extremely low startup current (typically 0.5 µA) and low operating current (typically 5 mA), making it ideal for power-sensitive applications.
• Programmable Soft Start: The inclusion of a programmable soft-start function minimizes stress on the input power source by gradually increasing the output voltage at startup, thereby reducing the inrush current.
• Frequency Flexibility: The UCC3808N-2 offers a programmable switching frequency from 10kHz to 1MHz, providing designers with the flexibility to optimize their design for efficiency or for the size of the power supply components.
• Trimmed Oscillator Discharge Current: The oscillator discharge current is trimmed to ensure precise frequency control under all conditions.
• Undervoltage Lockout: With an undervoltage lockout (UVLO) feature, the device ensures that the controller remains off unless there is sufficient supply voltage, preventing malfunctions at low voltages.

Applications

• AC-DC Converters
• Isolated and Non-Isolated Power Supplies
• Telecommunications Equipment
• DC-DC Modules
• Offline Power Converters

The UCC3808N-2 comes in an 8-pin DIP (Dual In-line Package) which is suitable for through-hole mounting, ensuring ease of integration into a variety of circuit boards. With its advanced features and Texas Instruments' reputation for quality, this PWM controller is an excellent choice for designers seeking a reliable and efficient solution for their power management needs.