ZLTSB-18V 5-18V 12A PWM DC Motor Speed Controller Module with 13kHz Frequency

The PWM ZLTSB-18V is a compact and powerful PWM (Pulse Width Modulation) DC motor speed controller module designed to regulate the speed and direction of brushed DC motors across a wide operating voltage range of 5V to 18V DC. By rapidly switching the power supplied to the motor on and off at varying duty cycles, the module delivers a precisely controlled average voltage, allowing smooth and stepless speed adjustment from 0% to 100%. The controller also supports direction control by reversing the polarity of the output, making it a versatile solution for robotics, automation systems, and electric vehicle prototypes.

The 12A PWM controller Arduino is built around a high-frequency 13kHz switching design and features a 12A rated current with a 15A short-term peak capability, enabling it to handle demanding loads such as power supply cooling fans, DC pumps, and medium-sized brushed motors. The module provides a well-defined power envelope across its voltage range: 60W at 5V, 70W at 6V, 110W at 9V, 150W at 12V, 180W at 15V, and 200W at 18V, ensuring reliable operation when paired with appropriately rated power supplies and loads. The board measures 68mm × 48mm × 15mm and includes reverse-polarity protection on the supply input as well as a soft-start function that ramps the motor current up over approximately 2 seconds to prevent sudden inrush currents.

Typical applications for the PWM ZLTSB-18V include DC motor speed regulation, LED dimming, computer power supply cooling fan control, and robotics projects. The module's straightforward interface and wide voltage range make it suitable for both hobbyist and industrial use. The controller can be driven by an external PWM signal (approximately 5V, 10kHz) or by a 0-5V analog voltage for speed adjustment, providing flexibility in how it is integrated into a larger control system.