Tl494 Circuit Diagram Jun 2026

To ensure the circuit operates reliably, configure these core internal blocks:

Before diving into the diagrams, let’s understand why this chip has survived for over 40 years: tl494 circuit diagram

Push-pull configuration (Pin 13 → Vref). To ensure the circuit operates reliably, configure these

Need 300V from a 12V source for a Nixie tube or an electric fence? Use a boost topology. +---+---+ 1IN+ |1 +--+--+ 16| 2IN+ 1IN- |2

+---+---+ 1IN+ |1 +--+--+ 16| 2IN+ 1IN- |2 15| 2IN- FEEDBACK |3 14| Vref (5V) DTC |4 13| Output Ctrl CT |5 12| VCC (7-40V) RT |6 11| C2 (Output 2) GND |7 10| E2 (Emitter 2) C1 |8 9| E1 (Emitter 1) +-----------+

This circuit requires careful PCB layout. The high-frequency switching can cause noise and overheating if not built properly.

The TL494 circuit diagram consists of several external components that are connected to the IC to form a complete PWM control circuit. The basic circuit diagram of a TL494 is shown below: