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Texas Instruments TL494CDR — Power Management (PMIC / Gate Driver)

TL494CDR Texas Instruments PWM Controller – Active, 16-SOIC

MPNTL494CDR
Active

Texas Instruments TL494CDR, PWM controller, 7 V to 40 V supply, 1 kHz to 300 kHz switching, 45% max duty cycle, 2 outputs, transistor driver, 16-SOIC, active lifecycle.

$0.4500Ref. price · indicative, final on quote
Texas Instruments TL494CDR datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL494CDR specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))7V ~ 40V
Frequency - switching1kHz ~ 300kHz
I/O channels2
Output phases1
Duty cycle45%
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Up, Step-Down, Step-Up/Step-Down
TopologyBuck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Clock syncNo
Case16-SOIC (0.154\", 3.90mm Width)
Control featuresDead Time Control, Frequency Control
Output configurationPositive
Synchronous rectifierNo

Product details

Active PWM controller for multi-topology power stages

The TL494CDR is a fixed-frequency PWM controller supporting buck, boost, flyback, forward, full-bridge, half-bridge, and push-pull topologies. Its 7 V to 40 V supply range covers industrial buses without an external regulator. Two transistor-driver outputs each deliver a maximum duty cycle of 45%, which forces a push-pull or half-bridge architecture for output voltages above the input rail. The 1 kHz to 300 kHz switching frequency range lets the designer trade transformer size against core loss.

Duty-cycle ceiling and topology selection

At 45% max duty cycle per output, the TL494CDR cannot run a single-ended forward converter without a reset winding or a two-switch forward topology. The UCC2806DWTR offers a 50% duty cycle and synchronous rectifier capability, but its 47 kHz maximum switching frequency limits transformer miniaturisation.

Frequently asked questions

What is the maximum duty cycle of TL494CDR?

45% per output. This limits single-ended forward converter designs without a reset winding; push-pull or half-bridge topologies are the natural fit.

Is TL494CDR obsolete?

No.

What are the equivalents or cross references for TL494CDR?

The UCC2806DWTR is a functional peer with 50% duty cycle and synchronous rectifier support, but its 47 kHz max switching frequency is lower. The LM5150QURUMRQ1 is a single-output boost controller with automotive qualification — not a direct cross for multi-topology designs.