BUY KA7500 https://www.utsource.net/itm/p/873124.html
Single Monolithic chip
The KA7500 is a voltage-mode PWM (Pulse Width Modulation) controller manufactured by Samsung. It is a 16-pin DIP (Dual Inline Package) integrated circuit. Description: The KA7500 is a PWM controller used to regulate the output voltage of a power supply. It has an oscillator, error amplifier, reference voltage generator, and a PWM comparator. It also has a built-in thermal shutdown circuit. Features: Wide operating voltage range: 4.5V to 18V High-speed operation: 1MHz Low power consumption Built-in thermal shutdown circuit High accuracy reference voltage generator Low ripple PWM comparator Applications: The KA7500 is commonly used in switching power supplies, DC-DC converters, and other power supply applications. It is also used in motor control applications, such as brushless DC motor drives. (For reference only)