UC2845ADTR

Power Supply Controllers, Monitors Overview

The UC2845ADTR is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance DC-DC converter applications. It operates within a supply voltage range of 7.6V to 30V and supports switching frequencies up to 500 kHz. The device features an 8-pin SOIC package with surface-mount installation. Key electrical parameters include a maximum duty cycle of 50%, output drive capability of 1A, and a working temperature range from -40°C to 85°C. It integrates a precision oscillator, error amplifier, and current-sensing comparator.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture provides rapid line transient response and inherent cycle-by-cycle current limiting.
• Integrated precision oscillator allows external timing resistor programming for flexible frequency selection.
• High-side driver delivers robust gate drive current for efficient power switch operation.

Power Supply Controllers, Monitors Applications

• Boost converters
• Flyback converters
• Forward converters

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'ADTR' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and industrial temperature grade. Ensure compatibility with the target PCB footprint for the 8-SOIC package. Cross-reference ordering information directly with Texas Instruments or authorized distributors to validate part authenticity and revision status before procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring current-mode control in isolated or non-isolated topologies. It is suitable for applications needing a maximum duty cycle of 50% and operating frequencies up to 500 kHz. Consider the 8-SOIC package constraints and thermal dissipation requirements when designing the layout. Verify that the input voltage range aligns with the system's power supply rails.

Power Supply Controllers, Monitors Part Context

The UC2845 belongs to the UCx84x family of current-mode PWM controllers, widely used in power management systems. This series offers a balance of performance and cost-effectiveness for general-purpose switching regulators. The UC2845 variant specifically targets applications where a 50% maximum duty cycle is sufficient, distinguishing it from higher-duty-cycle counterparts in the same family.

Power Supply Controllers, Monitors Replacement Considerations

UC2845AD8R

Power Supply Controllers, Monitors FAQ

What is the maximum duty cycle of the UC2845ADTR?

The maximum duty cycle is limited to 50%.

Does the UC2845ADTR support synchronous rectification?

No, the UC2845ADTR does not support synchronous rectification; it is designed for driving single high-side switches.