UC3714D

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Power management integrated circuits (PMICs) are essential in modern electronic systems, as they convert, regulate and monitor the voltage levels for efficient operation. The UC3714D is one such PMIC, and specialized power-line interface circuitry that is designed for driving MOSFETs, IGBTs and other power switches. It is particularly useful for laminated gate drivers applications, making it a popular choice amongst engineers and system designers. This article will discuss the application fields and working principles of the UC3714D.

Application Fields

The UC3714D is a multipurpose gate driver that is especially suitable for laminated gate driver applications. As a part of a PMIC, the current driver of the circuit can drive signals with a single 5V voltage power source without the use of an inverter, potentially reducing the size, cost, and complexity of the overall circuit. The low impedance output enable input within a wide supply voltage range also allows for easy gate drive in multiple gate driver applications. The large on-chip capacitance allows for a low maximum gate drive current limit without the need of an external capacitor. This makes the UC3714D ideal for applications such as motor control, charger control, and home appliances.

Working Principles

The UC3714D is designed to drive both IGBTs and MOSFETs with a single 5V supply voltage. When the device is powered on, the input signal (VMIN) is applied to the input buffer. The signal is then compared to the internal reference voltage, and if the input signal is higher, a logic high will be generated. This logic high then enables the output power booster. When enabled, the output of the power booster drives the gate of the IGBT/MOSFET, allowing current to flow. The UC3714D also features a protection function which helps protect against overcurrent, spikes, and surges.

The UC3714D also features a universal output enable input which allows for easy gate drive in multiple gate driver applications. It supports operating voltage range from 5V to 18V and has a low input capacitance. In addition, it provides up to 4A of peak current and can withstand top and bottom half cell voltages of up to 18V. The UC3714D also features an adjustable propagation delay and dead time, allowing users to adapt the output drive timing as needed.

Conclusion

The UC3714D is a multipurpose gate driver specifically designed for laminated gate driver applications. It is suitable for use with 5V supply voltage and can drive various types of IGBTs and MOSFETs. The low impedance output enable input and wide supply voltage range enable easy gate driving in multiple gate driver applications. In addition, the device features adjustable propagation delay and dead times, making it an ideal solution for power management in motor control, charger control, and home appliances.

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