ISL89167FRTAZ

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The ISL89167FRTAZ is a remarkable product from Intersil, which is categorized as a PMIC – Gate Driver. This particular product is designed and especially crafted for driving both the low-side and the high-side MOSFETs or IGBTs in the more power-intensive applications, such as the automotive and telecoms applications.It has a 40V operating voltage range and is provided in a space-saving 4mmx4mm QFN package, which makes it a reliable and dependable gate driver.

The salient features of the ISL89167FRTAZ are Zener-protected inputs, very low-side gate driver output resistance, and an on-chip temperature sensor that monitors the power circuit temperature. Additionally, this product can withstand transients up to 80V, and it comes with an adjustable current sink for low-side gate driver over-current detection. This device is configured to work on both the inverting and non-inverting gate drive systems, making it highly versatile.

Regarding the application of the ISL89167FRTAZ, it is mainly used in industrial process controllers, DC-DC converters, LED drivers, power supply systems and high-current motor controllers. Owing to its strong over-current protection, transient protection and speed stability, it is perfect for automotive and telecoms applications. It can also be used in servers and consumer electronics, such as the charging piles and routers.

Regarding its working principle, the ISL89167FRTAZ has two independent gate drivers, one meant for the high-side (HS) switches, while the other is meant for the low-side (LS) switches. The two gate drivers share one common low-voltage supply and one high-voltage supply. The two gate drivers can be operated separately, so that one can be used to independently control the HS and LS switches. The device has two independent control and logic inputs, which control the HS and LS switches.

The high-side gate driver has an output voltage range of 4V to 20V; and it is capable of sourcing (pull up) current. It is also capable of sinking (pull down) a very minimal amount of current. The high-side gate driver is used for switching the high-side (HS) switches between on and off states. When the HS control signal rises above the logic level of the given input, the HS switch is turned on.

The low-side gate driver has an output voltage range of -3V to -20V. It is capable of sinking currents. It is used for turning the low-side (LS) switches between on and off states. When the LS control signal goes low below the logic level of the given input, the LS switch is turned on. The low-side gate driver prevents the back biasing of the power transistors, that is, it suppresses the body diodes of the power transistors.

The ISL89167FRTAZ PMIC – Gate Driver is a highly reliable, efficient and cost-effective device. It can be used in a variety of power-intensive applications, particularly the automotive and telecoms applications, owing to its superior protection features like the Zener-protected inputs, low-side gate driver output resistance and on-chip temperature sensor. It is also suitable for use in consumer electronic applications.

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