UC1824 High-Speed PWM Controller – Texas Instruments

Category: Electronics, Other Semiconductors, Texas Instruments HighPerformance Analog

Overview

The UC1824 series, crafted for high-frequency switched mode power supplies, stands out with its swift response time characterized by a 50-ns delay from propagation to output. With their ability to accommodate switching frequencies up to 1 MHz coupled with high current dual totem pole outputs, these PWM controllers cater to versatile applications. Each controller delivers a 1.5 A peak, signaling robust capacity for challenging tasks.

Key Features

To ensure efficient operation across various situations, Texas Instruments’ UC1824 PWM controllers integrate multiple sophisticated features:

Complementary Outputs: Support for complementary signal processing enhances its versatility.
Dual Totem Pole Outputs: Ability to drive high peak currents suitable for capacitive loads such as power MOSFET gates.
Fast Propagation Delay: Minimized delay enables high-speed operations, crucial for time-sensitive applications.
High-Frequency Performance: System design that sustains switching frequencies to 1 MHz without loss of performance.
Error Amplifier: The inclusion of a wide bandwidth error amplifier ensures precision and accuracy.
Advanced Logic Design: Fully latched logic with double pulse suppression promotes stable and reliable operation.

Protection and Control Mechanisms

The UC1824 is bolstered with advanced protection features:

Current Limit Comparator: This feature with a 1-V threshold guards against overcurrent situations.
Soft Start and Maximum Duty Cycle Control: Facilitates gradual activation, preventing power spikes and managing the duty cycle.
Under-Voltage Lockout (UVLO): With 800 mV hysteresis, it protects against power fluctuations and ensures a low startup current.
Shutdown Port: A TTL compatible port is included for system shutdown, adding to the safety features of the controller.

Electrical Specifications and Packaging

Operating at the absolute maximum ratings the UC1824 series permits a supply voltage of 30V. It can accommodate a range of analog inputs and supports an output current of 0.5A, both sourcing and sinking. While designed for high-temperature performance, storage temperature tolerances fall within -65 to 150°C. This PWM controller is available in both DIL-16 and SOIC-16 packages, providing flexibility for integration into various circuit layouts.

Important Notice

Texas Instruments provides an important notice regarding product availability, its warranty, and critical application usage. All parameters and specifications are upheld as per the Texas Instruments standard warranty, with production processing not mandatorily entailing the testing of all parameters.