UCC37323DRG4

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PMIC - Gate Drivers

A PMIC or power management integrated circuit (IC) is a terminal power supply device for providing regulated electrical power for a variety of electronic circuits. Gate driver, as one of the important functions of PMIC, is used to drive a logic level signal at the gate of a power transistor.

UCC37323DRG4 is an advanced gate driver IC which is especially designed for high voltage 3-phase brushless DC (BLDC) and permanent magnet BLDC motor applications. This IC is built with an integrated pre-driver circuit, providing the necessary current to drive the power FETs or IGBTs in high switch frequency applications and provides the necessary current to drive the gate capacitances.

Application Field

UCC37323DRG4 is a device suitable for many motion control or motor control applications such as high power BLDC motors, multi-phase DC motors, servomotors and unipolar brush motors. It can also be used for several industrial and consumer applications including robotic systems, home appliances, electrical vehicle drives and many others.

Working Principle

UCC37323DRG4 is an integrated circuit with a pre-driver that provides the necessary current to drive the power FETs or IGBTs in high switch frequency applications. The chip is designed such that the PWM output voltage from the microcontroller on the gate driver can be quickly shifted to the required high and low levels so that it may be used with either slow or high speed FETs and IGBTs. The chip also includes an integrated voltage clamp in the logic power which prevents overvoltage damage to the logic circuitry.

This chip operates at a constant frequency and generates a regulated voltage that can be used to quickly and safely switch the FETs and IGBTs in various motor control applications. This IC has an adjustable dead-time of 1.5ns to 33ns that prevents shoot-through of the FETs or IGBTs. It also has a built-in thermal protection circuit which monitors the junction temperature and shuts off the motor through over-temperature protection.

To sum up, UCC37323DRG4 is an advanced gate driver IC which provides optimized gate driving of the FETs or IGBTs in motor control systems, including 3-phase brushless DC (BLDC) and permanent magnet BLDC motor applications. The chip offers integrated pre-drives that eliminates the need for external drivers, as well as integrated voltage clamp, adjustable dead-time and thermal protection circuits for added protection and ease of use.

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