UC3843D8G4

Power Supply Controllers, Monitors Overview

The UC3843D8G4 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 100% and includes under-voltage lockout with hysteresis. It utilizes an SOIC-8 surface-mount package and functions across a temperature range of 0°C to +70°C.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture optimized for high-performance power conversion
• Integrated pulse-by-pulse current limiting for enhanced protection
• Under-voltage lockout mechanism with built-in hysteresis
• High-current totem-pole output stage for direct MOSFET driving

Power Supply Controllers, Monitors Applications

• Offline AC-to-DC converters
• Forward converters
• Flyback converters
• Buck and Boost DC-to-DC topologies

Power Supply Controllers, Monitors Procurement Notes

Verify the suffix G4 indicates compliance with RoHS standards and absence of hazardous substances. Confirm the D8 designation corresponds to the SOIC-8 surface-mount package variant. Ensure procurement sources provide valid manufacturer traceability documentation to guarantee component authenticity and quality assurance.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring current-mode control with integrated protection features. The 500 kHz switching capability allows for reduced passive component size. Verify that the input voltage remains within the specified operating range to ensure proper startup and regulation behavior in the target application circuit.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC384x family of current-mode PWM controllers from Texas Instruments. It shares functional similarities with the UC3842, UC3844, and UC3845 series, differing primarily in specific threshold settings and operational characteristics tailored for various converter topologies.

Power Supply Controllers, Monitors Replacement Considerations

• UC3843D8
• UC3843N
• UC3843D

Power Supply Controllers, Monitors FAQ

What is the maximum switching frequency supported by the UC3843D8G4?

The device supports a switching frequency of up to 500 kHz.

Does the UC3843D8G4 include overcurrent protection?

Yes, it features pulse-by-pulse current limiting to protect the power switch.