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Texas Instruments UC2845ADW — Discrete Semiconductors

Texas Instruments UC2845ADW PWM Controller, 16-SOIC, 500 kHz

MPNUC2845ADW
End of Life

Texas Instruments UC2845ADW current-mode PWM controller, 16-SOIC (7.50 mm width), step-up/step-up/step-down function, boost/buck/flyback/forward topology, up to 500 kHz switching, 7.6 V to 30 V supply, active production.

$1.44Ref. price · indicative, final on quote
Texas Instruments UC2845ADW datasheet (PDF)
Packaging16-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

UC2845ADW specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))7.6V ~ 30V
FrequencyUp to 500kHz
I/O channels1
Output phases1
Duty cycle48%
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Up, Step-Up/Step-Down
TopologyBoost, Buck, Flyback, Forward
Clock syncNo
Case16-SOIC (0.295\", 7.50mm Width)
Control featuresFrequency Control
Output configurationPositive, Isolation Capable
Synchronous rectifierNo

Product details

Current-mode PWM controller for isolated and non-isolated topologies

The Texas Instruments UC2845ADW is a current-mode PWM controller designed for step-up and step-up/step-down topologies including boost, buck, flyback, and forward converters. Its 48% maximum duty cycle and single transistor-driver output suit it for medium-power isolated supplies where the controller sits on the primary side and drives a MOSFET through a pulse transformer. Operating from a supply rail of 7.6 V to 30 V, the controller integrates frequency control and an oscillator that runs up to 500 kHz — a practical ceiling for ferrite-core transformers in the 50–100 W range before core loss dominates the thermal budget.