Product Overview: Texas Instruments UCC2813D-2

The UCC2813D-2 is a high-performance, low-power BiCMOS current-mode pulse width modulation (PWM) controller from Texas Instruments. This integrated circuit is designed for a wide range of power supply applications and is particularly suitable for use in off-line and DC-to-DC converter configurations. It offers a unique combination of features, efficiency, and reliability for engineers looking to optimize their power management solutions.

Key Features

• High-Frequency Operation: The UCC2813D-2 can operate at frequencies up to 1MHz, enabling the design of power supplies with smaller components, resulting in a more compact and cost-effective solution.
• Low Startup and Operating Current: This device 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.
• Advanced BiCMOS Technology: The use of BiCMOS technology allows for low power dissipation and greater noise immunity, which is critical for stable and reliable power supply operation.
• Trimmed Oscillator Discharge Current: This feature ensures consistent and accurate duty cycle control across the full range of operating conditions.
• Current Sense Discharge Transistor: A robust discharge transistor is provided for rapid discharge of the current sense capacitor during each cycle, which improves the response time and accuracy of the current-limiting function.

Applications

• Off-line power supplies
• DC-to-DC converters
• Telecommunication equipment
• Industrial power systems
• Portable electronics

Technical Specifications

The UCC2813D-2 is available in a compact 8-pin SOIC package, making it an excellent choice for space-constrained applications. The device features an automatic feed-forward compensation and a programmable maximum duty cycle, which provides designers with flexibility in their design. It also includes an undervoltage lockout with hysteresis, ensuring that the power supply operates only when the input voltage is within an acceptable range.

With its combination of advanced features and robust performance, the Texas Instruments UCC2813D-2 PWM controller is an ideal choice for engineers seeking to develop efficient and reliable power supplies for a wide variety of electronic devices.