L9857-TR

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The L9857-TR is a advanced level gate driver for the power management integrated circuits (PMIC) industry, featuring a versatile, compact and current-controlled architecture. This driver appears within multiple applications, including improved motor control, power conversion and intelligent power converters for various automotive applications. Combining exclusive features such as a low side charge pump and a current mode input stage, this device provides superior performance and superior ruggedness, resulting in an ideal device for energy efficiency and efficiency in motor control systems.

The L9857-TR is a two-channel gate driver, designed to provide high-current gate driving capability and advanced diagnostics. It features a combination of emulated outputs, high voltage integrated drivers and logic control signals. This combination of features allows the device to support a variety of applications, ranging from steady state and high power motor control, to more traditional digital output applications, such as logic level control signals. Compared to most other gate drivers, this device is capable of supporting higher-power ratings, up to 240A peak.

Power management integrated circuits are devices that convert a digital signal into a power supply voltage. They are critical elements in the operation of motors, as they provide the initial electrical power needed to get the motor up and running. This is why it is important to select a device that can handle large amounts of current, and also provide advanced diagnostics. The L9857-TR fits the bill, allowing power loads up to 240A peak, while also providing advanced diagnostics including over-voltage, under-voltage, and over-temperature protection.

The L9857-TR is designed to be versatile in both the modes of operation and the range of application. Built around a current-controlled architecture, the device has two external input transistors (NPN & PNP) which can be used as dual-channel, high and low side drivers for N-channel FETs or IGBTs. Separate logic inputs and comparators allow for further customisation of the device, ensuring that the user can specify their own current limits and over-temperature protection. The device also integrates a low-side charge pump, capable of delivering up to 240A peak for motor control applications. Additionally, the device has an internal voltage source and feedback loop, allowing for improved efficiency.

The power stage of the L9857-TR is what sets it apart from conventional gate drivers. It incorporates an advanced current-controlled architecture, whereby current is supplied to the load independently of the voltage. When compared to traditional gate drivers, the current-controlled architecture is capable of providing a wider range of output current, making the device suitable for higher-power applications. This allows the device to drive higher currents than standard gate drivers, while maintaining excellent efficiency.

The advanced diagnostics capabilities of the L9857-TR are another major advantage of the device. With an integrated over-voltage, under-voltage and over-temperature protection, users can be sure that their system is being protected from potentially damaging conditions. Additionally, the device features a fault flag to notify the user in the event of a fault, helping to ensure system continuity. By using the integrated features of the device, users can ensure the highest protection and performance from their motor control system.

The L9857-TR is an advanced gate driver for power management integrated circuits, offering high-current gate driving capability and a range of integrated diagnostics and protection features. Designed to be versatile and expandable, the device can be used in a variety of applications and is suitable for power loads up to 240A peak. With a current-controlled architecture, advanced diagnostics, and a low-side charge pump, the device can provide system protection and enhanced efficiency in applications ranging from motor control to digital output.

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