Understanding these circuit topologies allows you to build efficient power supplies, inverters, and chargers from datasheet reference designs.

The TL494 IC has a 16-pin package with several pinouts that need to be connected to external components to form a functional circuit. The pinout configuration of the TL494 is as follows:

The TL494 might be an "old" chip, but its flexibility and low cost make it a staple for anyone serious about power electronics. Whether you're building a laboratory power supply or a solar inverter, mastering this circuit is a rite of passage.

The IC contains:

The primary error amplifier (Input 1 and 2) is typically used for voltage regulation. The diagram shows a non-inverting input (Pin 1) connected to a voltage divider from the power supply’s output, and an inverting input (Pin 2) connected to the reference voltage. When the output voltage rises, the diagram’s logic dictates that the output of this amplifier rises.

ceramic capacitor close to to filter out high-frequency switching noise.

: Pin 4 provides a way to set a minimum "off-time" between pulses to prevent overlap in push-pull stages.