The oscillator (pins 5 & 6) generates a sawtooth wave. The PWM comparator compares this sawtooth to the error signal from Amps 1 & 2. The output logic then drives the two transistors (Q1/Q2). Pin 4 (DTC) adds an offset to the sawtooth, limiting max duty cycle.
Pin 13, the Output Control, acts as a logic toggle. The circuit diagram shows this pin connected to the internal flip-flop. When Pin 13 is tied to the 5V reference, the internal flip-flop is enabled, and the output transistors (Pins 8, 9, 10, 11) alternate in a push-pull configuration—ideal for driving a center-tapped transformer. When Pin 13 is grounded, the flip-flop is bypassed, and the output transistors switch in parallel. This allows the diagram to reveal the chip's versatility: it can drive a single output stage or a double-ended output stage depending solely on this wiring configuration. tl494 circuit diagram
This buck regulator maintains a stable 5V output regardless of input variations or load changes. The oscillator (pins 5 & 6) generates a sawtooth wave
is a staple in the world of power electronics. Whether you're building a custom inverter or a high-efficiency bench power supply, this fixed-frequency Pulse Width Modulation (PWM) Pin 4 (DTC) adds an offset to the
Allows you to monitor both voltage and current simultaneously.