UC3845D8G4

Power Supply Controllers, Monitors Overview

The UC3845D8G4 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance switching power supply applications. It operates within an input voltage range of 8.2 V to 25 V, with a nominal supply voltage of 15 V. The device supports multiple converter topologies including Boost, Buck, Flyback, and Forward configurations. It features a maximum switching frequency of 500 kHz and a duty cycle limit of 50%. The output stage provides a drive current of 1 A at 5 V. Operating temperatures range from 0°C to +70°C. The component is housed in an 8-pin SOIC package.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode pulse width modulation control for precise regulation
• Supports versatile DC-DC converter topologies such as boost, buck, flyback, and forward
• Features a robust output driver capable of sourcing 1 A current

Power Supply Controllers, Monitors Applications

• Boost converter designs
• Buck converter implementations
• Flyback power supply circuits
• Forward converter systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as documented. Confirm the package designation matches the 8-SOIC form factor. Ensure the operating temperature grade aligns with the 0 to 70 C specification. Cross-reference the manufacturer part number against official Texas Instruments databases to validate authenticity and revision history before procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring current-mode control with a 50% maximum duty cycle. It is suitable for designs needing a 1 A output drive capability. Consider the 500 kHz switching frequency limit when determining passive component values. Verify that the required topology (Boost, Buck, Flyback, or Forward) is compatible with the single-output configuration.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx845 series of current-mode PWM controllers. It shares functional similarities with other variants in the family but differs in package type and specific electrical ratings. The UC3845D8G4 specifically utilizes an 8-pin SOIC package, distinguishing it from wider packages like SOIC-14 found in other series members.

Power Supply Controllers, Monitors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.