THM 30-4812WI

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DC-DC converters refers to the conversion of DC input voltage to another DC output voltage. They provide the static power conversion necessary to facilitate the functioning of electrical devices and circuits. The THM 30-4812WI is a buck topology dual output DC/DC module from TOP Power Electronics Company, designed to regulate a high or low input voltage down to a fixed output voltage. It features a wide input voltage range, current mode control, adjustable output voltage and adjustable switching frequency. It also provides high efficiency, low ripple and good output regulation. The following article details the application field and working principle of the 30-4812WI.

Application Field of THM 30-4812WI

The THM 30-4812WI is suitable for a range of applications including solar photovoltaic (PV) power systems, telecom systems, DC power plants, LED driver and other power supplies designed for industrial use. It can provide an input voltage of up to 48V DC and outputs of 30W. Output voltage is adjustable from 1.3V – 24V. The product has built in surge protection of 600W and can handle transients as large as 500W/ms. In solar PV applications, it acts as a buffer between the solar panels and the load, providing a stable energy flow even when the source voltage is fluctuating.

Working Principle of THM 30-4812WI

The working principle of DC-DC converters is based on the concept of energy conversion. The DC-DC converter is designed to convert DC input voltage to another DC output voltage. The THM 30-4812WI uses buck topology for this purpose and features synchronous rectification, featuring high efficiency and good maximum load efficiency. The THM 30-4812WI converter consists of the following components: one Buck Converter IC, one inductor, one load resistor, one diode, one capacitor and one MOSFET. The inductor stores energy, the diode serves as an energy return and the capacitor acts as a storage capacitor. The MOSFET switching action is specified by the Sync Buck converter IC.

The DC/DC converter begins to work the moment a DC input voltage is introduced. The Synchronous Buck converter IC sends out a signal which starts the switching action of the MOSFET. Upon closing of the MOSFET the input XL voltage and the inductor magnetic flux increases significantly. Then the MOSFET is turned off and the stored magnetic energy is discharged to the output via the diode. The remaining energy will flow into the storage capacitor to be used at the next switching cycle.

When the converter is working, all the components, including the capacitor, the inductor and the MOSFET are in a state of dynamic equilibrium, ensuring efficient energy transfer from input to output at the desired output voltage. The switching frequency of the THM 30-4812WI can be adjusted from 200K Hz to 1.2MHz. This ensures that the output voltage is always stable, even when the input voltage is changing.

Conclusion

The THM 30-4812WI is a high-efficiency dual output DC/DC converter from TOP Power Electronics Company, using buck topology. It is suitable for a range of applications including solar PV applications, telecom systems, DC power plants, LED driver and other industrial power supplies. Its wide input voltage range, adjustable output voltage and adjustable switching frequency makes it one of the most popular DC/DC converters in the market. The working principle of the 30-4812WI is based on the concept of energy conversion and is composed by a Buck Converter IC, an inductor, a load resistor, a diode, a capacitor and a MOSFET.

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