ISL6614CBZA-T

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The ISL6614CBZA-T is a part of the Intersil Isolated Gate Driver (IGD) product family, which provides a solution for high-speed, high-efficiency, isolated gate drive applications. Isolated gate drivers are often used in power topologies where power switching occurs at high frequencies and large voltage swings, such as AC/DC converters, motor drives, and automotive systems.

Typically, gate drivers are designed for boards and system level applications to drive external, isolated MOSFETs. An IGD provides isolated power and gate drive signals that interface to the isolated gate driver power source, making them ideal for applications in automotive and industrial control applications that are required to be isolated from the switch node.

The ISL6614CBZA-T is an enhanced, low-side, negative-logic device with high-side, low-side and complementary dead time adjustments. It supports a wide range of input voltage supply (3.3V to 12V) and a wide range of output voltage swing (2.2 to 9V). In addition, it includes overcurrent protection and an ability to drive up to a 10A load. The ISL6614CBZA-T is designed with an on-board LIN transceiver, making it suitable for applications that require communication between electronic components over the LIN bus system.

The ISL6614CBZA-T is designed to provide full-time protection against accidental transients generated during startup, process and programming activities. This protection helps to eliminate output faults, reduce the time needed for power on reset (POR), and reduce the risk of system shutdown due to malfunctions. The device includes an overcurrent protection (OCP) circuit that protects the power devices and the power supply. In addition, it includes an error-amplifier-based OCP circuit with an adjustable threshold level, as well as an override OCP circuit.

ISL6614CBZA-T gate driver also offers low on-resistance (RDS(ON)) and has a wide operating temperature range of -40°C to +125°C. Additionally, the device features an adaptive power-sharing support that enables it to regulate the supply current delivered to the external MOSFETs to maintain their drain-source voltages within a specified range. This adaptive power-sharing feature helps to maintain system stability, reduce EMI and data-logic noise, and improve system reliability. The device also offers multiple levels of isolation through the use of high-speed optocouplers.

The working principle of the ISL6614CBZA-T is based on the generation of high-side gate signals based on the logic signal provided to their logic input pins. An N-channel MOSFET is used at the input stage to provide a low-impedance signal path to the gate driver, while high-speed optocouplers isolate the signal and provide isolation between the gate driver and its input signal. The gate signal is then amplified using a high-speed MOSFET driver, which provides a large drive current to the external MOSFET\'s gate. The high current output of the amplifier provides the necessary drive to switch the external MOSFET on and off as required. The high-side gate signals are then used to actively pull the external MOSFET\'s gate low.

Applications for the ISL6614CBZA-T include high-speed motor control, DC/DC and AC/DC converters, automotive systems, high-voltage motor control, isolated gate drive, and solar inverters. It is also suitable for industrial control applications such as power amplifiers, power switches, welding power supplies, and video switching. The high-performance features of the ISL6614CBZA-T, along with its enhanced protection features, make it an ideal device for applications that require a high level of reliability.

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