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PMIC - Gate Drivers

Power semiconductor gate drivers are devices located between a power circuit and the power devices control circuit, essential for the correct operation of the circuit itself. In particular, the DRV8304HRHAT is a gate driver from the DRV830x component family, from Texas Instruments. This particular component was designed with three inverting gate drives and one non-inverting gate drive for low-side MOSFET. Working across the 5V-20V range, accommodating various MOSFETs, the device is suitable for several application areas including automotive, industrial drives and automation.

Features and Specifications

The DRV8304HRHAT is a three-in, one-out gate driver, capable of supplying over 1A peak pump current and a drive voltage of 18-20V. It comes with two pins, which when set to logic “high” can be used to enable or disable the gate drive channels by logic control. Furthermore, the OCP (Over Current Protection) output pin offers short circuit protection information to the user. This allows for the excess pump current to be monitored.

The component is made up of three individual low-side Gate Drivers and one high-side driver as well as a charge pump and Logic LevelShift circuitry. It has two sets of three pins connector: one is used to drive the Power MOSFETs, while the second is used to control the status of the driver. The DPWM (Digital Pulse Width Modulation) process regulates the current flows and is used as a communication bridge between logic and power section. All pins are referenced to 5V.

Functionality

The DRV8304HRHAT is a complete, low-side + high-side, three-phase MOSFET driver solution. It contains a 3-channel low-side MOSFET driver with half-bridge topology, capable of doing non-inverting and inverting gate drive with 3 ground pins. It also contains a 3-channel high-side MOSFET driver, which can operate up to 20V and serves to complete the half bridge.

The DRV8304HRHAT can be used in multiple applications, including automotive, industrial drives and automation. The flexibility of the DRV8304HRHAT comes from its adjustable_driver timing capability. This feature allows the user to easily customize the drive current and timing according to the specific requirements of the application. This also enables the user to achieve the best possible switching behavior within the available power and speed or efficiency constraints.

The DRV8304HRHAT also includes a dedicated 2-wire interface, known as I2C, that allows the user to monitor the status of the driver and its associated outputs. This feedback information can be utilized for diagnostic purposes and provides real-time information about the status of each phase. The I2C interface also allows for fault diagnosis and fast corrective actions can be taken if the fault is diagnosed correctly.

Conclusion

The DRV8304HRHAT is a highly reliable, flexible and efficient three-phase MOSFET driver designed for multiple applications including automotive, industrial drives and automation. It contains non-inverting and inverting drivers, as well as a 3-channel high-side MOSFET driver, capable of operating up to 20V. It includes an adjustable driver timing capability which allows the user to easily customize the drive current and timing according to the specific requirements of the application. Additionally, the DRV8304HRHAT contains advanced features such as a dedicated 2-wire I2C interface, charge pump, and LogicLevelShift circuitry, allowing the user to monitor the driver’s output status and receive feedback information for better fault diagnosis and fast corrective actions.

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