L6385E

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L6385E is a high voltage gate driver that is part of the PMIC (Power Management Integrated Circuit) family. It is designed to provide efficient, reliable and robust control of high voltage switching devices, such as IGBTs (insulated-gate bipolar transistors), MOSFETs (Metal-oxide-semiconductor Field-effect Transistors) and GTOs (Gate Turn-off Thyristors). In the application fields of drives systems, motor control, power converters, lithum-ion battery pack protection circuits, AC-DC and DC-AC power conversion, over voltage protection, and inverter applications, to name but a few.

The L6385E has four main components: the main driver, a low-side driver, a high-side driver, and an auxiliary driver. The four individual drivers incorporate all of the necessary protection features and their design prevents the MOSFETs and IGBTs from becoming over-stressed in an inductive load. This is important because an overstressed transistor can cause catastrophic failure.

The main driver of the L6385E can directly drive both the high and low-side switches, through its dual output pins, as well as support the corresponding gate turn on and turn off times with rise and fall time pins, respectively. In addition, there are two additional output pins that can be used to control a second switch or auxiliary feature, like a gate reset or diagnostics. The main driver also includes protection features, such as an over-current, over-temperature, and over-voltage protection, to increase system robustness and reliability.

The low-side driver provides fast and accurate turn-on and turn-off times, as well as support for the low-side MOSFET/IGBT gate drive. With its over-voltage protection pre-driver, it helps to protect the MOSFET/IGBT from voltage transients and fault states caused by slow turn-on transients. The low-side driver also has other protection features such as over-current, over-temperature, open load, and short circuit protection.

The high-side driver provides a fast and accurate turn-on and turn-off times, as well as support for the high-side MOSFET/IGBT gate drive. It is designed to provide optimal turn-on and turn-off times through its dual current sensing topology and integrated bootstrap, which helps to provide an efficient and accurate control of the gate drive. It also has over-current, over-temperature and open load protection.

The auxiliary driver of the L6385E makes use of the low-side driver to provide additional control options, such as reset and diagnostics. This is important for applications where multiple levels of protection are needed. It also provides gate-level diagnostics, which is useful for system monitoring and maintenance. The auxiliary driver includes a dedicated reset pin for resetting the IC in case of an impending fault, and can also be used as a backup for over-current, over-temperature, and open load protection.

In summary, the L6385E is a high voltage gate driver that provides efficient and robust control of high voltage switching devices. It is designed to provide fast and accurate turn-on and turn-off times, as well as protection features, such as over-voltage, over-current, over-temperature, open load, short circuit and diagnostic protection. With these features, it is an ideal device for driving high voltage switching devices in power control applications.

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