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Texas Instruments UC3875DWPTR — Analog & Data Acquisition

UC3875DWPTR Full-Bridge PWM Controller, 1MHz, 28-SOIC

MPNUC3875DWPTR
End of Life

Texas Instruments UC3875DWPTR full-bridge PWM controller, 1MHz switching, 100% duty cycle, 9.5V-20V supply, 28-SOIC (7.50mm width), surface mount, 0°C to 70°C.

$11.37Ref. price · indicative, final on quote
Texas Instruments UC3875DWPTR datasheet (PDF)
Packaging28-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

UC3875DWPTR specifications
ParameterValue
MountingSurface Mount
Voltage - start up10.75 V
Voltage - supply (Vcc (Vdd))9.5V ~ 20V
Frequency - switching1MHz
Duty cycle100%
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
TopologyFull-Bridge
Case28-SOIC (0.295\", 7.50mm Width)
Control featuresFrequency Control, Soft Start, Sync
Fault protectionCurrent Limiting
Output isolationNon-Isolated

Product details

The 1MHz maximum switching frequency is the headline parameter for this controller.

Full-bridge topology with 100% duty cycle

This controller implements full-bridge topology, which is the standard choice for higher-power isolated converters (typically 500W to several kW) where the primary-side switches see only half the input voltage compared to a half-bridge. The 100% duty cycle capability means the controller can drive the primary switches to full on-time, maximizing power throughput. Combined with current-mode control (implied by the current-limiting fault protection), it offers good line transient rejection and inherent cycle-by-cycle current limiting.

It is ROHS3 compliant.

Frequently asked questions

Is the UC3875DWPTR obsolete or active?

The UC3875DWPTR is Active in production status, per the manufacturer's latest lifecycle record. There is no last-time-buy or end-of-life notice on file. It is ROHS3 compliant and suitable for new designs.

What is the UC3875DWPTR used for?

The UC3875DWPTR is a full-bridge PWM controller used in isolated DC-DC converters and offline power supplies. Typical applications include telecom brick converters, server power supplies, industrial power systems, and any design requiring galvanic isolation at power levels from a few hundred watts to several kilowatts.

What are the alternatives for UC3875DWPTR?

Pin-compatible alternatives within the same TI family include the UC3875DWPTRG4 (same die, different packaging suffix). For a different feature set, consider the UC3879 or UCC3895 series, which offer enhanced control features like adaptive delay and bidirectional synchronization. Verify pin compatibility and electrical specifications before substituting.