Skip to datasheet
Dual-output PWM controller

TL494 Internal Circuitry

Explore the internal circuitry and functional stages of TL494.

Package view

Inside TL494

Timing, pulse control and output steering inside one controller.

Compact TL494 cutaway showing reference, oscillator, error amplifiers, PWM and dead-time comparators, steering and two output switches.
Functional cutaway; external timing and power components are outside the IC.

Explore the circuit

Select a stage to see its role and connections

Create a stable ramp

The reference and RC oscillator establish the timing waveform.

Compare control demands

Either error amplifier or DTC can reduce pulse duration.

Select the output pattern

The mode pin selects simultaneous or alternating output switching.

Component view