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DC DC Converters

A DC DC converter is a device that converts direct current electrical power from one voltage level to another. One common use of DC DC converters are voltage regulators which reduce voltage to a desired level. In this article, we will take a closer look at the application field and working principle of RP40-1212SG, a DC DC converter.

Application field of RP40-1212SG

RP40-1212SG is a 40W metered DC DC converter designed for industrial applications such as factory automation, communications, instrumentation and controls, LED lighting, etc. It is a single-output, non-isolated synchronous buck converter ideal for point-of-load (POL) applications. It offers a wide input voltage range, from 9V to 36V, and a programmable output voltage range with high efficiency operation up to 96%.

The metered technology used in RP40-1212SG ensures accuracy of rated input current and output voltage, making the converter suitable for use in sensitive applications. This device also includes integrated safety protection functions such as short circuit protection, over-temperature protection, over-voltage protection, and under-voltage lockout.

Working Principle of RP40-1212SG

The working principle of RP40-1212SG is based on synchronous buck converter theory. This theory states that the output voltage is proportional to the input voltage divided by the duty cycle of the switch network. In other words, the duty cycle is directly proportional to the desired output voltage.

The metered technology in RP40-1212SG implements regulation using current mode control. This type of control employs two control loops: one is for current sensing; the other is for feedback control. The primary control loop senses the output current at the high side of the switch and compares it to a preset current reference. Based on the error between the measured and the reference current, an error signal is generated, which is further used to adjust the duty cycle of the switch to compensate for the load fluctuation.

The secondary control loop monitors the output voltage, and uses the feedback signal to adjust the duty cycle to keep the output voltage at the predetermined value. By adjusting the duty cycle, the switching frequency of the SRFETs is also controlled, which determines the power efficiency of the device.

Conclusion

RP40-1212SG is an ideal DC DC converter for industrial applications due to its wide input voltage range, programmable output voltage, and high power efficiency. This device utilizes metered technology and synchronous buck converter theory in order to regulate output voltage and current, and ensure accuracy of the rated parameters. This makes the device suitable for sensitive applications. With safety protection functions such as short circuit protection, over-temperature protection, over-voltage protection, and under-voltage lockout, and a low standby power consumption, the RP40-1212SG is a reliable and efficient DC DC converter.

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