LM5109BMAX

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The LM5109BMAX is a PMIC (Power Management Integrated Circuit) specifically designed for gate driver applications. It provides a monolithic single channel gate driver with protection, diagnostics and gate drive control. The environment around the gate driver is automatically monitored and protected from abnormal conditions, including shorted MOSFETS, excessive current and thermal conditions. In addition, the LM5109BMAX provides an integrated gate drive MOSFET for low side applications, reducing the need for external high-side components to complete a gate control system. Beside its highest safety in applications, the LM5109BMAX also offers a wide range of features, such as fast gate turn-on, lower FOD, ProtectMode and multiple devices synchronization.

The LM5109BMAX gate driver is the first device to provide gate driver protection outside of discrete components. It provides a monolithic, single-channel gate driver with protection, diagnostics, and gate drive control. With the integrated logic-level MOSFET and integrated gate driver, the LM5109BMAX provides one of the most versatile and powerful gate driver solutions available. This solution offers features such as fast gate turn-on, ProtectMode, and multiple device synchronization. The device is ideal for high shelf, low shelf, and battery environmental protection.

The LM5109BMAX gate driver works by monitoring the logic levels at its inputs and controlling the operation of the connected MOSFETs. The MOSFET operation is controlled by either one of three dedicated control ports and by the embedded logic. The control ports allow the user to program the gate voltage, current and timeout of the MOSFET operation. The device also features built-in features like overtemperature protection, over-current protection, and output short-circuit protection.

The LM5109BMAX can also provide low side control of the MOSFETs in applications, eliminating the need for external high side components. The integrated gate drive MOSFET makes the LM5109BMAX an ideal solution for battery-powered applications, where space and power efficiency are important. Additionally, the driver has a very low output capacitance, which ensures fast switch turn-on and minimal propagation delay.

The LM5109BMAX also offers ProtectMode and multiple device synchronization. ProtectMode is a feature that reduces the output of the gate driver when it senses an over-current or over-temperature condition. This help protect the MOSFETs from unwanted voltage transients and operating outside their safe operating range. Multiple device synchronization allows control of multiple drivers with a single control port.

In conclusion, the LM5109BMAX is a powerful and versatile PMIC specifically designed for gate driver applications. It features integrated features to help protect the connected MOSFETS, reduce system cost and size, and increase efficiency. Fast gate turn-on and multiple device synchronization allows for better control of gate voltage and current and makes the LM5109BMAX an ideal choice for applications such as high shelf, low shelf, and battery environmental protection.

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