JCJ1048S12

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DC-DC converters refer to devices that convert DC input voltage to a different level of DC output voltage. One particular DC-DC converter, the JCJ1048S12, has made considerable contributions to the industry. This paper will discuss its application field and working principle.

The JCJ1048S12 is a high-efficiency and low-cost DC-DC step-down converter. It is suitable specifically for distributed power systems in Industrial, Telecommunications, IT and Automotive applications. It supplies eight output voltages from ±5V to ±15V, and is designed to support systems with multiple output voltage configurations. The non-isolated DC-DC step-down regulator also includes external current feedback for improved output voltage accuracy and board space optimization. Furthermore, it has an adjustable output voltage of ±10V to ±15V, and provides up to 5A output current.

In terms of design, the JCJ1048S12 includes an internal low on-resistance N-Channel MOSFET with minimum power losses. It also features enable/shutdown control, soft-start, and thermal protection. With an operating junction temperature range of -40°C to +125°C, it supports various system applications.

The working principle of the JCJ1048S12 is relatively straightforward. It begins with an input voltage, which is then applied to the primary transformer side of the converter. The secondary terminal of the transformer is connected to an internal N-Channel MOSFET, which is fed to an internal power inductor, along with an array of filter capacitors. The energy from the inductor is then transferred to one of the output voltage rails. This entire closed-loop system provides stability to the voltage output.

Finally, to ensure efficient power transfer from the input to the output, the JCJ1048S12 utilizes an external current feedback technique. This method allows the converter to adjust the current and maintain a proper balance between the input voltage and the output voltage. The feedback loop in the converter will detect the difference between the two and adjust the current accordingly.

In conclusion, the JCJ1048S12 is a DC-DC step-down converter designed to provide a variety of output voltage levels for distributed power systems. It includes features such as internal low on-resistance MOSFETs, enable/shutdown control, soft-start, and thermal protection. To ensure efficient power transfer from the input to the output, the converter utilizes an external current feedback technique. This article has given an overview of its application field and working principle.

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