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Texas Instruments UC2854ADW — Analog & Data Acquisition
Texas Instruments

UC2854ADW PFC Controller, Average Current Mode, 200kHz

MPNUC2854ADW
End of Life

Texas Instruments UC2854ADW, Average Current Mode PFC Controller, 200kHz switching, 10V ~ 20V supply, 250 µA startup, -40°C to 85°C, 16-SOIC (0.295", 7.50mm Width), Surface Mount.

$5.74Ref. price · indicative, final on quote
UC2854ADW datasheet
Packaging16-SOIC (0.295", 7.50mm Width)
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Specifications

UC2854ADW Technical Specifications
ParameterValue
Mounting typeSurface Mount
Voltage10V ~ 20V
Current - startup250 µA
Frequency200kHz
Operating temperature-40°C ~ 85°C
ModeAverage Current
PackageTube
Case16-SOIC (0.295\", 7.50mm Width)

Product details

Average current mode PFC controller for industrial power supplies

The Texas Instruments UC2854ADW is an average current mode power factor correction (PFC) controller in a 16-SOIC surface-mount package. It operates at a 200 kHz switching frequency and accepts a supply voltage from 10V to 20V, with a low 250 µA startup current. The part is rated for the industrial temperature range of -40°C to 85°C, making it suitable for outdoor telecom rectifiers, motor-drive auxiliary supplies, and factory-automation power stages where PFC is required to meet harmonic-current limits.

Supply range and startup current — bias design

The 10V to 20V supply range covers the output of a standard auxiliary winding or a regulated bias rail. The 250 µA startup current is low enough that a high-value startup resistor can charge the VCC capacitor without excessive dissipation.

Lifecycle — active, no LTB risk

The UC2854ADW is listed as Active with ROHS3 compliance.

Frequently asked questions

What is a suitable replacement for UC2854ADW?

The UC2854ADW is an average current mode PFC controller. Within the same TI family, the UC3854 series is a functional equivalent with similar pinout and control architecture — verify the specific variant's supply range and switching frequency against your design's requirements before substituting.

Does UC2854ADW require an external MOSFET?

Yes, the UC2854ADW is a controller IC and requires an external MOSFET and boost diode to form the complete PFC stage. The gate-drive output is designed to drive a standard power MOSFET through a series resistor.

What is the difference between UC2854 and UC3854?

Both are average current mode PFC controllers from TI. The UC2854 is specified for the industrial temperature range (-40°C to 85°C), while the UC3854 is typically rated for commercial temperature (0°C to 70°C). The UC2854ADW is the 16-SOIC surface-mount variant of the UC2854 family.

What is UC2854ADW's listed mode (Average Current) on this component line?

The UC2854ADW operates in Average Current mode, which provides continuous inductor current sensing and low total harmonic distortion (THD) over a wide load range — the preferred control method for active PFC stages above 75W.