Product Overview: Texas Instruments UCC3808AD-2

The UCC3808AD-2 is a low-power, BiCMOS current-mode pulse-width modulation (PWM) controller from Texas Instruments, a leader in semiconductor design and manufacturing. This device is an ideal choice for power supply designers looking for a high-performance solution with enhanced features for a wide range of applications, including switch-mode power supplies, DC-DC converters, and power inverters.

Key Features

• Low Start-Up Current: The UCC3808AD-2 boasts a start-up current of typically 0.15 mA, making it suitable for systems that require high efficiency from the initial power-up phase.
• Adjustable Operating Frequency: With an oscillator frequency range that can be programmed from 10 kHz to 1 MHz, designers have the flexibility to optimize their power supply for efficiency, size, and cost.
• Current Mode Control: This feature provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation, which altogether enhance the reliability and performance of the power supply.
• Low-Power Standby Mode: The UCC3808AD-2 includes a low-power standby mode that significantly reduces the supply current to 0.5 mA, making it ideal for battery-operated and energy-saving applications.
• High Peak Current Drive: The device is capable of delivering a peak current of 1 A, which is suitable for driving a power MOSFET or IGBT directly.
• Programmable Soft Start: This feature limits the inrush current during start-up, contributing to the overall system reliability.
• Under-Voltage Lockout (UVLO): Both line and low-side UVLO thresholds are included, ensuring that the controller operates at the correct voltage levels.

Applications

The UCC3808AD-2 is versatile and can be used in a variety of applications. Some of the common applications include:

• Off-line power supplies
• DC-to-DC converters
• Telecom power systems
• Industrial power systems
• Battery-powered equipment

Additional Information

The device is available in a standard 8-pin SOIC package, which is suitable for surface mount technology (SMT) and fits easily into compact designs. Texas Instruments provides extensive technical support, including datasheets, reference designs, and application notes to assist engineers in implementing the UCC3808AD-2 into their designs.