SQM48T25033-NAB0

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DC/DC converters convert a higher voltage DC source into a lower voltage DC source at different current and power levels. Among them, SQM48T25033-NAB0 is one of the most popular and reliable converters with wide application field. This article will introduce the application field and working principle of this specific model.

Application Field of SQM48T25033-NAB0

SQM48T25033-NAB0 is a non-isolated step-down switching regulator which is designed to transform 26V-36V DC input voltage into continuous 8V/18A output. This converter is normally used in a wide range of applications, especially for those who are looking for higher efficiency and better performance. The typical applications are digital products such as remote control box, Bluetooth speakers, notebook physical test equipment, industrial automation, etc.

Working Principle of SQM48T25033-NAB0

SQM48T25033-NAB0 converter uses Pulse Width Modulation (PWM) technology to control average voltage output with a 25 kHz switching frequency. In this circuit design, the duty cycle of the output pulses is controlled by a feedback signal. And this feedback signal comes directly from the output voltage.

To regulate the output voltage, the buck regulator will first measure the output voltage. Then it will compare the output voltage with its reference voltage. A suitable error is generated when the two voltages deviate from each other. This error signal is applied to a Pulse Width Modulation (PWM) circuit to modulate the duty cycle of the switching transistor. The circuit will increase the duty cycle of the transistor to raise output voltage if the setpoint voltage is higher than the actual output voltage. This process will continue until the output voltage is stabilized and regulated.

Advantages of SQM48T25033-NAB0

SQM48T25033-NAB0 buck regulator is able to handle wide output current of up to 18A with minimum input voltage of 26V. It also provides very good efficiency, typically more than 80%, even at the full load of 18A. And the average output ripple voltage is less than or equal to 100mV, which means that the converter is not producing too much noise and interference.

Additionally, this converter is also designed with short-circuit and over-current protection features. This can effectively avoid any kinds of unpredictable over-current or over-temperature conditions due to the sudden peak current load of a device. An over-temperature control system is also available to cut off the output if the converter\'s internal temperatures reach over a certain limit.

Conclusion

To sum up, SQM48T25033-NAB0 is a reliable and efficient DC/DC buck converter which is suitable for various industrial applications. With the wide input voltage range and high output current, this buck converter also provides various safety features such as over-current protection, over-temperature protection and short-circuit proof to further ensure the safety and stability of the system.

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