The UCC3858N 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. This device integrates multiple features that enhance the performance of power systems, making it an ideal choice for designers looking to optimize power management in their products.

Key Features

• Current-Mode Control: Provides fast transient response and excellent loop stability.
• Low Startup Current: The UCC3858N boasts a startup current of typically 0.5 µA, which is beneficial for reducing standby power consumption.
• Wide Operating Range: This controller operates with a supply voltage range from 8V to 14.5V, accommodating various application requirements.
• Automatic Feed Forward Compensation: Enhances performance across a wide range of input voltages.
• Trimmed Oscillator Discharge Current: Ensures consistent and accurate timing performance.
• Under-Voltage Lockout (UVLO): Both for startup and operation, ensuring the controller only operates when the supply voltage is sufficient.
• Low Operating Current: At 2.2 mA typical operating current, the UCC3858N is optimized for low-power operation.
• Dual-Mode Overcurrent Protection: Includes both peak and average current limiting for robust protection against overcurrent conditions.

Applications

The UCC3858N is suitable for a variety of applications, including:

• Offline power supplies
• DC-DC converters
• Telecommunications equipment
• Portable devices
• Green-mode power supplies

Package and Availability

The Texas Instruments UCC3858N is available in an 8-pin plastic DIP (PDIP) package, providing a compact solution for printed circuit board designs. This device is designed for industrial and commercial applications, where reliability and efficiency are paramount. For detailed specifications and application notes, or to order samples, please visit the Texas Instruments website or contact an authorized distributor.