UC2844AQDR

Power Supply Controllers, Monitors Overview

The UC2844AQDR is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance power supply applications. It operates within a supply voltage range of 10V to 30V and features a fixed switching frequency of 500 kHz. The device supports a maximum duty cycle of 50% and includes an integrated oscillator with trim capability. It provides a robust output driver capable of sourcing and sinking 1A peak current. The component is housed in a 14-SOIC package and is rated for an operating temperature range from -40°C to +125°C, ensuring reliability in demanding environments.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture for improved transient response
• Integrated oscillator with precise frequency trimming
• High-current push-pull output driver stage
• Automotive-grade qualification for extended thermal stability

Power Supply Controllers, Monitors Applications

• Flyback converters for offline power supplies
• Forward converters in industrial equipment
• Buck and boost DC-DC converter topologies
• Automotive power management systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'AQDR' indicates automotive grade qualification and tape-and-reel packaging. Confirm that the 14-SOIC package matches the target PCB footprint. Ensure the supplier provides documentation confirming RoHS3 compliance and MSL level 1 status. Cross-reference the manufacturer part number with official TI distribution channels to avoid counterfeit components.

Power Supply Controllers, Monitors Selection Notes

Select this component when a 500 kHz fixed frequency is required for compact magnetic design. Choose the 14-SOIC package for higher pin count flexibility compared to 8-pin variants. Consider the automotive temperature rating if the application exceeds standard industrial limits. Verify that the 50% maximum duty cycle aligns with the chosen transformer or inductor topology requirements.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84xA series of current-mode PWM controllers. It shares functional similarities with the UC2844AD but offers enhanced automotive reliability and extended temperature specifications. The series is widely used in isolated and non-isolated power conversion designs requiring stable current-mode regulation.

Power Supply Controllers, Monitors Replacement Considerations

UC2844AD: Standard industrial grade variant with identical electrical performance but different temperature rating.

Power Supply Controllers, Monitors FAQ

What is the maximum duty cycle limitation?

The device is limited to a maximum duty cycle of 50%.

Does the UC2844AQDR include a shutdown pin?

No, this specific variant does not feature a dedicated shutdown pin.