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Texas Instruments UC3842DTR — Power Management (PMIC / Gate Driver)

UC3842DTR PWM Controller, Current Mode, 12V-28V, 14-SOIC

MPNUC3842DTR
End of Life

Texas Instruments UC3842DTR, Current Mode PWM Controller, 12V ~ 28V Supply, 11 mA Supply Current, 0°C ~ 70°C, Surface Mount, 14-SOIC Package, Tape & Reel.

$1.2400Ref. price · indicative, final on quote
Texas Instruments UC3842DTR datasheet (PDF)
Packaging14-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

UC3842DTR specifications
ParameterValue
MountingSurface Mount
Voltage - input-0.3V ~ 6.3V
Supply voltage12V ~ 28V
Current - supply11 mA
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR) Cut Tape (CT)
ApplicationsPWM Controller
ManufacturerTexas Instruments
Case14-SOIC (0.154\", 3.90mm Width)

Product details

Current-mode PWM controller in 14-SOIC

The UC3842DTR is a fixed-frequency current-mode PWM controller from Texas Instruments, designed for off-line and DC-to-DC converter applications. It operates from a supply voltage of 12V to 28V and draws a typical supply current of 11 mA. The controller is optimized for current-mode control, which provides improved line regulation, enhanced dynamic response, and simplified loop compensation compared to voltage-mode controllers. Housed in a 14-SOIC surface-mount package, it is intended for commercial temperature range environments (0°C to 70°C) — typical for AC-DC adapters, battery chargers, and open-frame power supplies where ambient temperatures stay moderate.

Supply range and current draw — BOM implications

The 12V to 28V supply range covers the standard bias rails used in many flyback and forward converters. The 11 mA supply current is the IC's own quiescent draw.

ROHS3 compliance is confirmed, so it meets current EU RoHS requirements without lead-free exemption.

Frequently asked questions

Is UC3842DTR lead-free?

Yes, the UC3842DTR is ROHS3 Compliant, meaning it meets the current EU RoHS directive for lead-free and other restricted substances. No exemption applies.

How does UC3842DTR compare to the UCC2806DWTR?

The UCC2806DWTR is a different PWM controller family: it has two outputs (vs single output on UC3842DTR), a lower maximum duty cycle (50% vs typical 96% for UC3842), and a wider temperature range (-40°C to 85°C vs 0°C to 70°C). The UCC2806DWTR also supports synchronous rectification and includes an enable function. It is not a direct pin-compatible replacement for the UC3842DTR, but could serve as a functional alternative in designs requiring dual outputs or wider temperature operation.