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UC2843D8TR

Texas Instruments UC2843D8TR PWM Controller, SOIC-8

MPNUC2843D8TR
End of Life

Texas Instruments UC2843D8TR current-mode PWM controller, multi-topology (boost, buck, buck-boost, flyback, forward), 97% max duty cycle, up to 500 kHz switching, 8-SOIC package, tape and reel.

$1.49Ref. price · indicative, final on quote
Texas Instruments UC2843D8TR datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

UC2843D8TR specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))12V ~ 28V
FrequencyUp to 500kHz
I/O channels1
Output phases1
Duty cycle97%
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Up, Step-Down, Step-Up/Step-Down
TopologyBoost, Buck, Buck-Boost, Flyback, Forward
Clock syncNo
Case8-SOIC (0.154\", 3.90mm Width)
Control featuresFrequency Control
Output configurationPositive, Isolation Capable
Synchronous rectifierNo

Product details

Multi-topology current-mode PWM controller in SOIC-8

The Texas Instruments UC2843D8TR is a current-mode PWM controller supporting step-up, step-down, and step-up/step-down topologies including boost, buck, buck-boost, flyback, and forward converters. It drives a single external transistor with a 97% maximum duty cycle, making it suitable for designs that need wide output regulation range. Operating from a 12 V to 28 V supply rail, the controller switches at up to 500 kHz and includes frequency control for tuning the oscillator.

The supplier device package is 8-SOIC. The SOIC-8 footprint is widely used and compatible with many existing power-supply layouts.

It is ROHS3 compliant, so it meets the current EU restriction on hazardous substances without exemption. Because it is an active part, it is sourced through authorized distribution channels.

Frequently asked questions

How do I get current pricing and availability for UC2843D8TR?

Submit an RFQ with your target quantity.

What is UC2843D8TR's listed function and topology support?

The controller supports step-up, step-down, and step-up/step-down functions across boost, buck, buck-boost, flyback, and forward topologies. It is a current-mode PWM controller with a single transistor-driver output.

What package does UC2843D8TR come in?

The supplier device package is 8-SOIC.