If you are not utilizing the secondary error amplifier (Pins 15 and 16) for current sensing, do not leave them floating. Tie the non-inverting input (Pin 16) to Ground and the inverting input (Pin 15) to VREF. This keeps the unused amplifier output low, preventing unexpected noise from overriding your primary control loop. Bypass Capacitors: Place a high-quality
The TL494 is housed in a standard 16-pin dual in-line package (DIP) or surface-mount (SOIC) package. Pin Number Description IN+ (Error Amp 1) tl494 circuit diagram
Tie Pin 13 directly to the 5V reference output (Pin 14) to enable push-pull mode. Dead-Time Control: Connect Pin 4 to GND through a If you are not utilizing the secondary error
For a application (where Output Control is grounded), the switching frequency equals the oscillator frequency: Bypass Capacitors: Place a high-quality The TL494 is
The TL494 is a highly versatile, industry-standard Pulse Width Modulation (PWM) control circuit. Introduced decades ago, this integrated circuit (IC) remains a cornerstone in power electronics. It is widely used in switch-mode power supplies (SMPS), DC-DC converters, inverter circuits, and motor control systems.
Moving to the dynamic aspect of the diagram, the oscillator section is represented by pins 5 and 6, labeled RT (Resistor Timing) and CT (Capacitor Timing). In the schematic view, these pins connect to an internal sawtooth generator. The circuit diagram illustrates that the frequency is determined by the external resistor and capacitor values attached to these pins.