VI-JT1-EW-F1

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DC–DC converters are power components used to convert electric current between two or more voltage domains. Among the most common DC–DC converters are voltage regulators, boost converters and buck converters. The VI-JT1-EW-F1 converter also belongs in this category. This DC–DC converter is a N-channel enhancement mode field effect transistor (FET) based, single inductor, step down switching regulator. It is designed to operate from an input voltage range of 4.5V to 42V, and deliver an output current of up to 1A.

TheVI-JT1-EW-F1 converter uses synchronous rectification as its energy conversion principle. It is capable of delivering an output ripple of less than 10mV while measuring 10V with a frequency (switching frequency) of 600kHz. The main application of the VI-JT1-EW-F1 converter is in the automotive industry, as its ultra-silence behavior makes it ideal for applications such as power steering ECUs, advanced gateway modules, and car audio systems.

The VI-JT1-EW-F1 converter consists of a controller, a driver and an N-channel power MOSFET. Thecontroller is a dedicated switching controllers coupled with 2.85V reference voltage, 40V power rail capability, slew rate control, short circuit protection, current limit protection, over temperature protection, and current monitoring. The controller consists of a main logic block and logic control circuitry including PWM ramp generators, startup sequencing,protection circuits, and activation of the output stage.

The driver is the stage responsible for transferring the control signals from the controller to the power MOSFET. Thedriver stage is a transistor-based high-voltage CMOS level shifter, which operates in the range from 0V to 42V. It also includes a deglitch circuit to reduce input voltage droop, a clock generator and an output stage for switching the MOSFET.

The N-channel power MOSFET is the main power switch of the DC–DC converter and is responsible for switching the voltage from input to output. Its operating parameters must be chosen in accordance with the output current specification and output voltage ripple.

The VI-JT1-EW-F1 converter is designed to minimize electromagnetic interference (EMI) and power loss. The switching frequency of the VI-JT1-EW-F1 is adjustable from 600kHz to 1.8MHz, and it is designed to be very efficient at both low and high frequencies, with efficiencies exceeding 95% at light loads. It also incorporates a soft start feature to reduce input inrush current and eliminate output overshoot.

In summary, the VI-JT1-EW-F1 DC–DC converter is a reliable, efficient and robust solution for automotive applications in the 4.5V to 42V input voltage range. It features a wide input voltage range, ultra-silence performance, low ripple, full protection, adjustable switching frequency, and high efficiency.

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