UC3844AD8TR

Power Supply Controllers, Monitors Overview

The UC3844AD8TR is a current-mode PWM controller manufactured by Texas Instruments, designed for offline and DC-to-DC converter applications. It operates within a supply voltage range of 12 V to 28 V and supports switching frequencies up to 500 kHz. The device features a maximum duty cycle of 50% and provides a 5 V output with a drive current capacity of 200 mA. It functions reliably across an operating temperature range of 0°C to +70°C. Packaged in an SOIC-8 surface-mount format, it includes built-in protection mechanisms such as undervoltage lockout and per-cycle current limiting.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture enabling precise peak inductor current regulation
• Integrated high-current图腾柱 (totem-pole) output stage for direct MOSFET driving
• Built-in undervoltage lockout with hysteresis for stable startup and shutdown
• Per-cycle current limiting and programmable output dead time

Power Supply Controllers, Monitors Applications

• Offline flyback power supplies
• Forward converter designs
• Buck and boost DC-to-DC converters
• Battery chargers

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'D8TR' confirms the SOIC-8 package and tape-and-reel packaging configuration. Ensure the component meets RoHS compliance requirements if mandated by your assembly process. Cross-reference the manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing single-output converters requiring current-mode control at frequencies up to 500 kHz. It is suitable for applications needing a 50% maximum duty cycle limit. Consider alternative models like the UC3845 series if higher duty cycles exceeding 50% are required for specific transformer turns ratios or input voltage ranges.

Power Supply Controllers, Monitors Part Context

This component belongs to the UC384x family of current-mode PWM controllers from Texas Instruments. These devices are widely used in cost-effective power supply designs due to their minimal external component count. The UC3844 variant specifically limits the duty cycle to 50%, distinguishing it from other family members that may support higher percentages.

Power Supply Controllers, Monitors Replacement Considerations

UC3844AD8G4: Pin-compatible lead-free version with identical electrical characteristics.