Skip to main content
Log in
Texas Instruments TL594IDR — Power Management (PMIC / Gate Driver)

TL594IDR PWM Controller, 1kHz–300kHz, 97% Duty Cycle

MPNTL594IDR
Active

Texas Instruments TL594IDR, PWM controller, 1kHz–300kHz switching, 97% max duty cycle, 2 outputs, transistor driver, 7V–40V supply, -40°C–85°C, 16-SOIC.

$0.9500Ref. price · indicative, final on quote
Texas Instruments TL594IDR datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL594IDR specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))7V ~ 40V
Frequency - switching1kHz ~ 300kHz
I/O channels2
Output phases1
Duty cycle97%
Operating temperature-40°C~85°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

PWM controller for multi-topology power supplies

The Texas Instruments TL594IDR is a fixed-frequency PWM controller that can be configured for step-up, step-down, or step-up/step-down conversion across seven topologies: buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull. It integrates two transistor-driver outputs, a 1 kHz to 300 kHz oscillator, dead-time control, and a 7 V to 40 V supply range, making it a workhorse for industrial and telecom power supplies that need one controller to handle multiple rail architectures.

97% duty cycle — headroom and dead-time trade-off

The 97% maximum duty cycle lets the controller hold the switch on nearly the whole period, useful for low-dropout regulation in boost or flyback stages.

Switching frequency range: 1 kHz to 300 kHz

The oscillator runs from 1 kHz to 300 kHz, set by a single RT/CT network.

Frequently asked questions

Is TL594IDR obsolete?

No, the TL594IDR is listed as Active in production. TI continues to manufacture this part, so there is no last-time-buy risk for new designs.

What is the maximum duty cycle of TL594IDR?

The maximum duty cycle is 97%, which allows near-continuous on-time for low-dropout regulation but requires careful dead-time control to ensure the transformer resets properly.

What is the closest functional second-source for TL594IDR?

The UCC2806DWTR is a functional peer with similar topology support (boost, flyback, forward converter) and the same output count and temperature range, but it has a 50% maximum duty cycle and includes synchronous rectifier capability. For designs that need duty cycles above 50%, the TL594IDR is the better fit.

What is TL594IDR's listed function?

The TL594IDR is a PWM controller that can be configured for step-up, step-down, or step-up/step-down conversion, supporting buck, boost, flyback, forward converter, full-bridge, half-bridge, and push-pull topologies.