UC2843AQD

Power Supply Controllers, Monitors Overview

The UC2843AQD is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance power supply applications. It supports Boost, Flyback, and Forward topologies with a maximum switching frequency of 500 kHz. The device features a single output capable of sourcing up to 1 A drive current, with a maximum duty cycle of 100%. Operating within a supply voltage range of 12 V to 28 V, it draws a typical operating supply current of 25 mA. The component is housed in an 8-SOIC package and operates across an extended temperature range from -40 °C to +125 °C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for rapid transient response and simplified loop compensation
• Provides robust gate drive capability with a peak output current of 1 A for efficient power stage driving
• Supports continuous conduction mode operation with a maximum duty cycle reaching 100 percent

Power Supply Controllers, Monitors Applications

• Boost converter implementations for step-up voltage regulation
• Flyback transformer-based isolated power supplies
• Forward converter designs requiring single-output isolation

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix designation against official Texas Instruments documentation to confirm exact package variant and qualification status. Ensure the selected part matches the required thermal and electrical specifications for the target application environment. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability. Check for any recent product change notifications that may affect pinout or performance characteristics.

Power Supply Controllers, Monitors Selection Notes

Select this controller when designing non-isolated or isolated converters requiring high peak drive current and wide input voltage ranges. Consider the 500 kHz switching frequency limit when determining external timing components and magnetic element sizes. Evaluate the 8-SOIC package constraints for thermal management and PCB layout space. Confirm compatibility with the intended topology, specifically Boost, Flyback, or Forward configurations, before integration into the power circuit design.

Power Supply Controllers, Monitors Part Context

This component belongs to the UC2843A-Q1 series of current-mode PWM controllers from Texas Instruments. It is engineered for automotive and industrial power management systems where reliability and performance are critical. The device integrates essential protection features and precise control loops to ensure stable operation across varying load and line conditions within its specified operating temperature range.

Power Supply Controllers, Monitors Replacement Considerations

UC2843AQD8 serves as a direct package-compatible alternative within the same family. UC2843AQDR offers identical functionality in a tape-and-reel format for automated assembly. UC2843AQD8R provides the same electrical specifications with reel packaging options.