Product Overview: Texas Instruments UCC3802DTR

The UCC3802DTR from Texas Instruments is a low-power, biCMOS current-mode pulse-width modulation (PWM) controller. It is designed for a wide range of power supply applications, including offline and DC-to-DC converters. This versatile controller integrates a variety of features that simplify system design and improve performance.

Key Features

• Current-Mode Control: The UCC3802DTR provides excellent output voltage regulation and fast response to load transients due to its current-mode control scheme.
• Low Startup and Operating Current: This device requires a low startup current of typically 0.5 μA and an operating current of typically 2.5 mA, making it ideal for power-efficient designs.
• Automatic Feed Forward Compensation: It offers automatic compensation for variations in the input voltage, which helps maintain stable operation across different conditions.
• Pulse-by-Pulse Current Limiting: Enhanced protection is provided by the pulse-by-pulse current limiting feature, which guards against overcurrent conditions.
• Under-Voltage Lockout (UVLO): The UCC3802DTR includes UVLO with hysteresis to ensure that the controller operates only when the supply voltage is within an acceptable range.
• Frequency Oscillator: The device has an onboard oscillator with a programmable frequency range, allowing designers to set the desired operating frequency for the converter.
• Soft Start: Soft-start capability is integrated to minimize startup stress on the power supply components by gradually increasing the duty cycle.
• Shutdown Capability: A shutdown pin is provided to enable easy power-down and remote inhibit functions.

Applications

The UCC3802DTR is suitable for a variety of applications, including:

• Switching power supplies
• AC-DC adapters and chargers
• DC-DC modules
• LED drivers
• Telecom and datacom power systems

Package and Availability

This PWM controller is offered in the 8-pin SOIC package, designated by the DTR suffix, which allows for easy integration into surface-mount technology (SMT) manufacturing processes. The UCC3802DTR is available in tape and reel format for automated assembly, ensuring efficient handling and placement during the production phase.

With its robust feature set and compact form factor, the UCC3802DTR from Texas Instruments stands out as an efficient solution for designers looking to optimize their power supply circuitry with a reliable and versatile PWM controller.