Tl494 Circuit Diagram -

is a classic fixed-frequency Pulse Width Modulation (PWM) control integrated circuit (IC) that has served as the backbone for switch-mode power supplies (SMPS) for decades. Its enduring popularity stems from its comprehensive architecture, which integrates all the essential functions for PWM control—oscillator, error amplifiers, dead-time control, and output steering—into a single 16-pin package. The Core Architecture

SMPS (Switch Mode Power Supplies): Both buck and boost topologies. Battery Chargers: Such as 36V Li-ion chargers. tl494 circuit diagram

• Texas Instruments (TI) TL494 datasheet
• TI's "TL494 PWM Control Circuit" application note
• Various online resources, such as electronics forums and design guides

• Single-ended (pin 13 to GND): Both outputs in parallel, frequency = oscillator frequency.
• Push-pull (pin 13 to REF): Outputs alternate, frequency = oscillator frequency / 2.

TL494 Circuit Diagram 2: Buck Converter (DC-DC Step-Down)

This is a practical power supply circuit: 12V to 5V @ 2A. is a classic fixed-frequency Pulse Width Modulation (PWM)

Non-inverting and inverting inputs for Error Amplifier 1. Typically used for voltage regulation. Pin 4 (DTC): Texas Instruments (TI) TL494 datasheet TI's "TL494 PWM

TL494 PWM Control Circuit:

• Connect VCC (Pin 12) to 12V-15V DC.
• Connect Pin 13 to Pin 14 (REF) for push-pull mode.
• Connect Pins 1 & 2 to GND to disable error amp 1 (makes it try for 100% duty).
• Caution: Without feedback, the duty cycle will max out. Use this only for oscilloscope testing.