It compares the sawtooth against the error amplifier output. As the control voltage rises, the output pulse width narrows. 5V Reference:
To read a , you must first memorize the function of the critical pins. tl494 circuit diagram
This 5V reference is the heartbeat of the circuit’s stability. On the diagram, we see lines branching from Pin 14 to various inputs. It serves a dual purpose: it powers the internal logic and provides a stable comparison voltage for the error amplifiers. Without this stable reference depicted in the diagram, the PWM control would drift with temperature and input voltage fluctuations, rendering the circuit useless for precision applications. It compares the sawtooth against the error amplifier output
: Provides a stable 5V reference voltage used for biasing the error amplifiers and setting control thresholds. Diverse Applications This 5V reference is the heartbeat of the
By using the TL494 to drive a high-side MOSFET, you can create a highly efficient step-down converter. The chip ensures that even as your battery drains, the output voltage remains exactly where you set it. Pure Sine Wave Inverters