Tl494 Circuit Diagram !!better!! | No Ads

Mastering the TL494: A Comprehensive Guide to Circuit Diagrams and Applications

Introduction

The TL494 is arguably one of the most successful and iconic integrated circuits (ICs) in the history of power electronics. Introduced by Texas Instruments in the late 1970s, this fixed-frequency, pulse-width modulation (PWM) control IC has stood the test of time. From inexpensive computer power supplies (PSUs) in the 1990s to modern inverter circuits, battery chargers, and DC-DC converters, the TL494 remains a favorite among hobbyists and professional engineers.

REF output (pin 14) provides 5V ± 5% up to 10mA. Use it for potentiometers and error amp references. tl494 circuit diagram

When designing a TL494-based switching power supply, consider the following: Mastering the TL494: A Comprehensive Guide to Circuit

The second error amplifier (Pins 15 and 16) is often wired for current limiting. The diagram might show a sense resistor in the load path connected to these pins. If the voltage drop across the sense resistor exceeds the preset limit (often set at the inputs), this amplifier overrides the voltage control. REF output (pin 14) provides 5V ± 5% up to 10mA