UCC37324DG4

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The UCC37324DG4, a precision, high-speed low side gate driver, is designed for use in PMIC - Gate Drivers. Its main purpose is to drive high-side MOSFETs or high-side BJTs on DC-DC converters or other high-side switching applications in power supplies, motor controls, LED lighting, and more. With the ability to drive any MOSFET up to 10.5A peak and 10A continuous current, while operating up to 200kHz and typically 4V dropout, the UCC37324DG4 is an ideal gate driver for any application, ranging from low-power to medium-power and even high-power loads.

The UCC37324DG4’s external components consist of an N-Channel MOSFET and a single pulldown resistor per output. The pulldown resistor values are typically chosen based on the amount of current needed. The N-Channel MOSFET is used to control the high-side device and ensures that the high-side device is properly controlled to meet the application’s specific requirements. The UCC37324DG4’s external components provide reliable control for the high-side device, while its internal logic ensures that the output signal is at the correct level with a minimum duty cycle.

The UCC37324DG4 features a wide range of features and benefits, such as the ability to support both synchronous and asynchronous switching, adjustable dead time, and an open-drain/high-Z output. The adjustable dead time allows designers to optimize the switching performance of their system in order to maximize efficiency, while the open-drain/high-Z output helps reduce ringing and facilitate fast switching. Additionally, the UCC37324DG4 has a number of protections and diagnostics for over-voltage, over-current, and undervoltage.

The UCC37324DG4’s working principle consists of two main stages. The first stage uses a charge pump to charge up the gate capacitance of the MOSFET or BJT. Once charged, the second stage uses an oscillator, driving the charge pump and providing a waveform. This waveform moves the gate voltage up and down, over a programmable amount of time to turn the high-side device on and off. This process is repeated in order to turn the high-side device on and off as desired.

In summary, UCC37324DG4 is an ideal gate driver solution for high-power loads in PMIC - Gate Drivers applications. It is designed to drive any MOSFET up to 10.5A peak current and 10A continuous current, while operating up to 200kHz and typically 4V dropout. Additionally, it features a wide range of features and protections for over-voltage, over-current, and undervoltage. Its working principle consists of two main stages to provide reliable control of the high-side device and minimize ringing.

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