IRS21094SPBF

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IRS21094SPBF is a gate driver appropriate for high current half-bridge applications, making it suitable for power supplies, DC–DC converters, as well as motor control and LED lighting systems. Despite its various possible uses, the driver functions in the same way once configured correctly.

The IRS21094SPBF embeds three high voltage output drivers (HV1, HV2, and HV3) designed to drive N-channel MOSFETs or IGBTs with a maximum output current of 6.0A. The driver also contains two low voltage outputs, LV1 and LV2, which are used to drive the gate of an external P-channel MOSFET.

The driver features both positive and negative high side gate control inputs that can be used in various half-bridge combinations. This makes it suitable for a wide variety of applications, including charging systems, high current DC/DC converters and inverters, as well as motor control and LED lighting systems.

The operating principle of the IRS21094SPBF is a voltage transfer function which uses two voltages as its inputs and sets the output level automatically based on the input voltages. The input voltage associated with the HV1 and HV2 pins is usually determined by an external MOSFET, whereas the input voltage associated with the HV3 pin is determined by an internal current source. The output voltage generated at the LV1 and LV2 pins is then set to a predetermined level based on the input voltages.

The driver is usually configured for either a high side driver or low side driver application, set by the ENA0 and ENA1 pins. The ENA0 pin controls the logic level of the HV1 and HV2 outputs, while the ENA1 pin controls the logic level of the HV3 output. The output logic level can be further configured using the ENB1 and ENB2 pins.

The driver includes a variety of features that protect the power devices and the system. This includes under voltage lockout, which prevents the upper and lower FETs from operating when the input voltage is out of range, and over temperature protection, which shuts down the driver if the junction temperature exceeds a predetermined level. The driver also incorporates a variety of safe operating area limitations to protect the power devices.

In addition, the driver contains a slew rate control feature, which limits the maximum current rise and fall rate in order to ensure that the power devices are not overstressed. This feature is especially useful for protecting FETs from the high dI/dt events often encountered during motor applications.

In summary, the IRS21094SPBF is a gate driver IC designed for use in high-current half-bridge applications. It is capable of driving N-channel MOSFETs or IGBTs with a maximum output current of 6.0A, and it includes a variety of features for protecting the power devices and the system. The driver is easily configured for either a high side driver or low side driver application, and it includes a slew rate control feature in order to protect the FETs from high dI/dt events. With its wide variety of features and its robust design, the IRS21094SPBF is an ideal solution for a host of power conversion applications.

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