UCC1805 Low-Power BiCMOS Current-Mode PWM Controller

The UCC1805 from Texas Instruments is a versatile and robust current-mode pulse-width modulation (PWM) controller designed for a wide range of power supply applications. This controller integrates several features making it an ideal choice for power converters that require high efficiency, reliability, and performance.

Key Features

• BiCMOS Technology: The UCC1805 incorporates BiCMOS technology, which combines the benefits of both bipolar and CMOS transistors, resulting in lower power consumption and improved noise immunity.
• Wide Operating Range: With an operating voltage range of 4.5V to 5.5V, this controller can accommodate various applications and ensure stable operation under different conditions.
• Current-Mode Control: Current-mode control provides inherent line feedforward, cycle-by-cycle current limiting, and ease of loop compensation, leading to enhanced performance and simplified circuit design.
• High-Frequency Operation: Capable of operating at frequencies up to 1MHz, the UCC1805 allows for smaller, more efficient power supplies with reduced component size and cost.
• Programmable Soft-Start: The soft-start feature limits inrush current during startup, improving system reliability and reducing stress on the power supply components.
• Under-Voltage Lockout (UVLO): The UVLO function ensures that the controller operates only when the supply voltage is within an acceptable range, protecting the circuit from low-voltage conditions.
• Low Startup and Operating Current: The UCC1805 has a low startup current of 0.5µA and an operating current of 2.5mA, making it suitable for battery-powered and energy-conscious applications.

Applications

The UCC1805 is well-suited for a variety of applications, including:

• DC-DC Converters
• Off-Line Power Supplies
• Portable Electronics
• Communication Systems
• Industrial and Medical Equipment

With its combination of features and performance, the UCC1805 PWM controller from Texas Instruments stands out as a top choice for designers looking to create compact, efficient, and reliable power supply solutions.