JTF1248S05

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DC (direct current) DC converters are a type of power supply that produces an output voltage with a desired magnitude in direct proportion to the magnitude of the input voltage. The JTF1248S05 is one such DC-DC converter that is used to provide a regulated and isolated output voltage from an unregulated and possibly noisy input voltage. It is specifically designed for applications such as distributed power systems, battery-powered systems, and demanding industrial systems that require high precision and reliability.

The JTF1248S05 is a non-isolated regulator whose primary features include high efficiency, small size, low power consumption, and wide input/output voltage range. The unit requires Vin of 6.75V to 18V and an input current range of 0A to 3A. It also has an output voltage of 5.0V±0.04V, an output current of 4A, and a conversion efficiency of up to 96%. The output voltage stability and ripple noise is excellent resulting in a output voltage ripple of below 10mV.

In terms of its working principle, the JTF1248S05 uses a buck-conversion architecture to achieve its high performance. The buck converter works by first converting the input AC voltage into a DC Voltage, then regulate it, and finally monitoring it, and adjusting its output voltage in real-time. The process begins by the rectifier that first converts the AC input voltage to a DC voltage.

The DC voltage is then rectified and smoothed by the filter to make it a clean power supply. It is now ready to be regulated and monitored. The PWM (pulse width modulation) circuit is responsible for controlling the output voltage. Whenever the output voltage does not match the set value, the PWM circuit works to adjust the output voltage accordingly by sending out a signal to the transistor switches to control the current and make it equal to the set value.

Furthermore, the JTF1248S05 employs an over-voltage, over-temperature, over/under current, and output short-circuit protection systems to help prevent any damage to the device. The unit also features an input reverse polarity protection to guard against power surge damages. Overall, the JTF1248S05 is a highly efficient and reliable DC-DC converter that can be used in a wide variety of applications.

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