Tl494 Circuit Diagram [better]
The is one of the most popular, versatile, and inexpensive pulse-width modulation (PWM) controller ICs. Designed originally by Texas Instruments, it remains a favorite among hobbyists and professionals for building switch-mode power supplies (SMPS), DC-DC converters, battery chargers, and inverters.
The Ultimate Guide to TL494: Pulse Width Modulation (PWM) Circuit Design tl494 circuit diagram