QLS08ZH-NT

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DC-DC converters are devices that convert the input direct current (DC) into a regulated output DC voltage. The QLS08ZH-NT (QLS) is a single-quadrant DC-DC converter application field used for low (50W) power motor control applications. It offers several features that make it well-suited for motor control applications.

Applications

The primary application field of the QLS DC-DC converter is motor control. It is suitable for a wide variety of motors, including brushless DC motors, brushed motors, stepper motors, and solenoids. The main advantages of using the QLS DC-DC converter for motor control applications include low-power usage, fast response time, precise current limit control, and adjustable ramp-up and ramp-down times. As a result, it is well-suited for a variety of motor control applications, such as electric scooters, robotic arms, or power steering systems.

Working Principle

The QLS08ZH-NT is a single-quadrant, current-mode DC-DC converter. It works by regulating a current to the load in order to regulate the output voltage. Current is drawn from the input source, typically a battery, and regulated using a pulse-width modulation (PWM) technique. The PWM amplitude determines the DC current and is adjusted according to the load requirements. The output voltage is monitored and adjusted accordingly, providing a regulated output voltage.

To ensure a stable output voltage, the QLS08ZH-NT converter employs a closed-loop architecture. The current is sensed and compared to a reference, which is set by an external signal or by the feedback voltage. The difference between the two is fed into the pulse-width modulator which adjusts the current accordingly, providing a regulated output voltage.

The QLS08ZH-NT DC-DC converter also features a constant-voltage/constant-current (CV/CC) control, which allows for both voltage and current regulation. In CV mode, the PWM output is adjusted to keep the output voltage constant, regardless of the load. In CC mode, the PWM output is adjusted to keep the current constant, regardless of the load.

Conclusion

The QLS08ZH-NT DC-DC converter is a low-power (50W) motor control application field device, ideal for a wide range of motor control and vehicular applications. It utilizes a pulse-width modulation (PWM) technique to regulate the input current, providing a stable output voltage. Furthermore, it offers adjustable ramp-up and ramp-down times, precise current limit control, and a constant-voltage/constant-current (CV/CC) mode. Thus, the QLS DC-DC converter is an excellent choice for a variety of motor control applications.

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