UCC27324DGNR

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The UCC27324DGNR is a part of a series of gate drivers in TI\'s portfolio of power management integrated circuits (PMICs). It is specifically designed for driving low-side and high-side MOSFETs, as well as integrated circuit (IC) controlled relays. It is an adjustable-rate (+/-10%) device that can be used to replace multiple discrete components, resulting in a space saving, cost effective solution in automotive, industrial, and consumer applications.

Application Field

The UCC27324DGNR is suitable for a wide range of applications, including automotive, industrial, and consumer. Automotive applications include powertrain, infotainment and convenience systems, allowing for a cost-effective and space saving system architecture. The UCC27324DGNR is compatible with 12V and 24V load supply voltage and gate threshold voltage, and supports inrush current control with a slow start control feature. It also has built-in protection to avoid damage due to "shoot-through" events.

In industrial applications, the UCC27324DGNR is used in a variety of motor drive systems, such as small pumps and fans. The adjustable-rate feature can be used to adjust the gate drive current for gate capacitances ranging from 35nF to 5.3mF, allowing the user to optimize system performance and cost. The UCC27324DGNR is also suitable for consumer applications, such as battery-powered applications, thanks to its low quiescent current and extremely low standby current.

Working Principle

The UCC27324DGNR is designed to drive low-side and high-side MOSFET channels and IC-controlled relays. It operates using a 7V to 45V supply voltage range, and is capable of driving load supply voltage up to 45V. The device is divided into two channels, low-side and high-side. Each channel incorporates an adjustable slew rate for the current ramp up and ramp down, as well as an adjustable current limit. To ensure reliable performance, the device supports automatic shoot-through protection, as well as overtemperature shutdown.

To activate the low-side channel, the signal at EN3 needs to be pulled low, while for the high-side channel, the signal at EN4 needs to be pulled high. When low-side channel is activated, the signal at EN4 is also pulled low and vice versa. This mechanism is referred to as level shifting. The device is driven by two separate power supply pins, VCC2 and VCC3, dedicated to the low-side and the high-side channel, respectively.

The low-side channel is capable of driving loads up to 3A, while the high-side channel can drive loads up to 6A. The device has a 450mΩ maximum on-resistance, and an adjustable current limit that can be set from 0.5A to 9A. It is designed with a low quiescent current to reduce power consumption, as well as an adjustable frequency range from 300kHz to 4kHz.

Conclusion

The UCC27324DGNR is a part of TI\'s portfolio of gate drivers, specifically designed for automotive, industrial, and consumer applications. It is an adjustable-rate device that can be used to replace multiple discrete components, resulting in a space saving, cost effective solution. The device comes with a 7V to 45V supply voltage range, as well as two separate power supply pins for the low-side and high-side channels. It supports inrush current control with a slow start control feature and has built-in protection to avoid damage due to "shoot-through" events. With its adjustable frequency range, adjustable current limit, and low quiescent and standby current, the UCC27324DGNR is the ideal solution for a variety of PMIC applications.

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