The way TL494IN form a bridge-type double-ended switching power supply circuit

The TL494IN strong text is a fixed-frequency pulse-width-modulation (PWM) control circuit. The design of the TL494IN not only incorporates the primary building blocks required to control a switching power supply but also addresses many basic problems and reduces the amount of additional circuitry required in the total design.
The TL494IN device incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power supply control, this device offers the flexibility to tailor the power supply control circuitry to a specific application.
The TL494IN device contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.
The error amplifiers exhibit a common-mode voltage range from -0.3V to -2V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The TL494 device provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.
The TL494IN device is characterized for operation from -40℃ to 85℃.

There is a description of the controller TL494IN. I want to apply it to form a bridge-type double-ended switching power supply circuit.

If you can give me a suggestion, I would much appreciate it.


Could you clarify what you mean when you say ‘give me a suggestion’? It may help to facilitate your receipt of forum member support.

Hey bud, I’m a Controls Engineer and understand the module, but why do you need a power supply circuit? Do you want to replace the existing? Is this for a project? Is this for the controller? What is the purpose?

1 Like