UC3843D8

$1.29

Description：IC REG CTRLR MULT TOPOLOGY 8SOIC
Series：UCx84x
Mfr：Texas Instruments
Package：Bulk,Tube

SKU:5906e1e0a9db Category: Power Supply Controllers, Monitors Brand: Texas Instruments

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Product introduction

UC3843D8 is listed in the Power Supply Controllers, Monitors range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC REG CTRLR MULT TOPOLOGY 8SOIC. Review the specifications below when checking this part for your BOM.

Power Supply Controllers, Monitors specifications for UC3843D8

Description：IC REG CTRLR MULT TOPOLOGY 8SOIC
Series：UCx84x
Mfr：Texas Instruments
Package：Bulk,Tube
Applications：PWM Controller
Voltage - Input：-0.3V ~ 6.3V
Voltage - Supply：12V ~ 28V
Current - Supply：11 mA
Operating Temperature：0°C ~ 70°C (TA)
Grade：-
Qualification：-
Mounting Type：Surface Mount
Package / Case：8-SOIC (0.154", 3.90mm Width)
Supplier Device Package：8-SOIC

Power Supply Controllers, Monitors datasheet and documents for UC3843D8

UC3843D8

Power Supply Controllers, Monitors Overview

The UC3843D8 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 pulse-by-pulse current limiting with double pulse suppression. 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 off-line and DC-to-DC converters
Integrated under-voltage lockout with hysteresis for reliable startup
Pulse-by-pulse current limiting with double pulse suppression capability

Power Supply Controllers, Monitors Applications

Off-line power supplies
DC-to-DC step-down (Buck) converters
Flyback converter topologies

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix D8 against official Texas Instruments documentation to confirm pinout compatibility and thermal characteristics. Ensure the component meets RoHS standards if required by your manufacturing process. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing procurement specifications.

Power Supply Controllers, Monitors Selection Notes

Select this component when a current-mode controller with 100% duty cycle capability is required for flyback or forward topologies. Consider the SOIC-8 package constraints for PCB layout. Verify that the operating input voltage range aligns with the system's power supply rails and that the thermal performance suits the intended enclosure environment.

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, differing primarily in start-up current thresholds and operating voltage ranges. The UC3843 variant is specifically tuned for applications requiring lower start-up currents compared to other family members.