IR21716S

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Gate drivers are an essential type of external component for power management integrated circuits (PMICs). They are responsible for driving the power transistors in PMICs and providing the current needed for the transistors to carry out the necessary switching. The IR21716S is an example of a PMIC gate driver IC specifically designed for use in electronic applications requiring high efficiency, such as automotive, industrial, lighting, and consumer electronics applications. In this article, we will discuss the IR21716S’s application fields and working principle.

IR21716S Application Fields

The IR21716S’ is designed for applications requiring wide input voltage operating range (spanning from 6V to 36V) and high efficiency due to its low quiescent current. This makes it ideal for use in automotive, industrial, lighting and consumer electronics applications, making it a versatile component. It can be used in a variety of DC-DC applications including buck (step down) converter, boost (step up) converter, inverter converter, flyback converter, and synchronous or asynchronous boost converters. The IR21716S can also be used as an active-clamping element to protect applications like motor drivers, DC-DC converters, and VRMs against reverse current.

IR21716S Working Principle

The IR21716S is a totem-pole gate driver that senses and switches the internal power transistor (N-channel MOSFET). This gate driver can be interfaced with an external control signal, such as a pulse width modulated (PWM) signal, and will react accordingly to drive the internal power transistor high or low accordingly. The low on-resistance (RDS(ON)) of the power transistor and the high efficiency of the bypassed gate driver enable high efficiency operation.

A gate driver typically consists of an upper and lower driver, each responsible for driving the gate of the power transistor in one direction. The upper driver is responsible for driving the gate of the power transistor to its "ON" state, and the lower driver is responsible for driving the gate to its "OFF" state. The IR21716S features a built-in safety circuit that provides protections against input over-voltage, output shorts, and over-temperature, making it reliable and robust.

The IR21716S can provide a pre-bias on the power transistor, speeds up its transfer process, and reduces the power dissipation. Additionally, its self-contained architecture facilitates compact and simple applications, eliminating the need for any additional components.

Conclusion

The IR21716S is a versatile and efficient PMIC gate driver IC, specifically designed for use in applications requiring wide input voltage operating range and high efficiency. It is capable of driving the power transistors used in a variety of DC-DC applications, including buck converters, boost converters, flyback converters, and synchronous or asynchronous boost converters. Additionally, its built-in safety circuit provides protection from input over-voltage, output shorts, and over-temperature.

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